/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/heap-data/min_max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:38:16,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:38:16,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:38:16,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:38:16,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:38:16,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:38:16,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:38:16,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:38:16,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:38:16,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:38:16,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:38:16,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:38:16,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:38:16,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:38:16,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:38:16,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:38:16,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:38:16,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:38:16,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:38:16,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:38:16,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:38:16,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:38:16,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:38:16,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:38:16,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:38:16,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:38:16,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:38:16,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:38:16,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:38:16,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:38:16,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:38:16,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:38:16,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:38:16,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:38:16,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:38:16,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:38:16,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:38:16,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:38:16,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:38:16,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:38:16,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:38:16,832 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 15:38:16,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:38:16,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:38:16,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:38:16,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:38:16,876 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:38:16,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:38:16,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:38:16,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:38:16,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:38:16,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:38:16,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:38:16,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:38:16,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:38:16,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:38:16,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:38:16,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:38:16,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:38:16,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:38:16,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:38:16,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:38:16,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:38:16,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:38:16,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:38:16,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:38:16,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:38:16,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:38:16,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:38:16,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:38:16,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:38:16,883 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 15:38:17,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:38:17,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:38:17,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:38:17,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:38:17,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:38:17,265 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/min_max.i [2020-10-12 15:38:17,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/312750707/05cbde54e7644561aa21ecfef876da65/FLAGabaeec9ac [2020-10-12 15:38:17,850 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:38:17,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/min_max.i [2020-10-12 15:38:17,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/312750707/05cbde54e7644561aa21ecfef876da65/FLAGabaeec9ac [2020-10-12 15:38:18,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/312750707/05cbde54e7644561aa21ecfef876da65 [2020-10-12 15:38:18,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:38:18,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:38:18,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:18,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:38:18,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:38:18,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cbdd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18, skipping insertion in model container [2020-10-12 15:38:18,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:38:18,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:38:18,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:18,556 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:38:18,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:18,687 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:38:18,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18 WrapperNode [2020-10-12 15:38:18,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:18,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:38:18,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:38:18,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:38:18,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (1/1) ... [2020-10-12 15:38:18,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:38:18,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:38:18,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:38:18,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:38:18,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (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 15:38:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:38:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:38:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:38:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:38:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:38:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:38:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:38:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:38:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:38:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:38:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:38:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:38:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:38:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:38:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:38:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:38:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:38:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:38:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:38:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:38:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:38:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:38:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:38:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:38:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:38:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:38:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:38:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:38:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:38:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:38:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:38:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:38:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:38:19,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:38:19,312 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:38:19,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:19 BoogieIcfgContainer [2020-10-12 15:38:19,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:38:19,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:38:19,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:38:19,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:38:19,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:38:18" (1/3) ... [2020-10-12 15:38:19,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d04b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:19, skipping insertion in model container [2020-10-12 15:38:19,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:18" (2/3) ... [2020-10-12 15:38:19,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d04b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:19, skipping insertion in model container [2020-10-12 15:38:19,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:19" (3/3) ... [2020-10-12 15:38:19,325 INFO L109 eAbstractionObserver]: Analyzing ICFG min_max.i [2020-10-12 15:38:19,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:38:19,344 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-12 15:38:19,358 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-12 15:38:19,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:38:19,380 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:38:19,380 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:38:19,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:38:19,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:38:19,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:38:19,381 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:38:19,381 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:38:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 15:38:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 15:38:19,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:19,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:19,404 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1192142104, now seen corresponding path program 1 times [2020-10-12 15:38:19,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:19,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52811144] [2020-10-12 15:38:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:19,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 15:38:19,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:19,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 15:38:19,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:38:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:38:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:38:19,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:19,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:19,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:38:19,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:19,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:19,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:19,914 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 15:38:19,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52811144] [2020-10-12 15:38:19,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:19,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:38:19,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355496062] [2020-10-12 15:38:19,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:38:19,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:38:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:38:19,942 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-12 15:38:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:20,105 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2020-10-12 15:38:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:38:20,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-12 15:38:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:20,118 INFO L225 Difference]: With dead ends: 45 [2020-10-12 15:38:20,118 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 15:38:20,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 15:38:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 15:38:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:38:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-12 15:38:20,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2020-10-12 15:38:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:20,163 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-12 15:38:20,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:38:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-12 15:38:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:38:20,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:20,165 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:20,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:38:20,165 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:20,166 INFO L82 PathProgramCache]: Analyzing trace with hash 897845277, now seen corresponding path program 1 times [2020-10-12 15:38:20,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:20,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48827683] [2020-10-12 15:38:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:38:20,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 15:38:20,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:38:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:20,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:20,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:20,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:20,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:20,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48827683] [2020-10-12 15:38:20,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:20,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:20,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413654947] [2020-10-12 15:38:20,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:20,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:20,448 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-10-12 15:38:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:20,610 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-12 15:38:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:38:20,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-12 15:38:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:20,613 INFO L225 Difference]: With dead ends: 46 [2020-10-12 15:38:20,613 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 15:38:20,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 15:38:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-10-12 15:38:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:38:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-12 15:38:20,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2020-10-12 15:38:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:20,623 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-12 15:38:20,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-12 15:38:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:38:20,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:20,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:20,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:38:20,625 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1577903647, now seen corresponding path program 1 times [2020-10-12 15:38:20,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:20,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904896120] [2020-10-12 15:38:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:38:20,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:20,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-12 15:38:20,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:38:20,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:20,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:20,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:20,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:20,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:20,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:20,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:20,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:20,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904896120] [2020-10-12 15:38:20,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:20,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:20,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805502846] [2020-10-12 15:38:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:20,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:20,874 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2020-10-12 15:38:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:21,038 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-12 15:38:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:38:21,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-12 15:38:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:21,039 INFO L225 Difference]: With dead ends: 48 [2020-10-12 15:38:21,040 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:38:21,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:38:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2020-10-12 15:38:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 15:38:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 15:38:21,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-12 15:38:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:21,048 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 15:38:21,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 15:38:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:38:21,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:21,050 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:21,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:38:21,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash -458989665, now seen corresponding path program 1 times [2020-10-12 15:38:21,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:21,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125281070] [2020-10-12 15:38:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:38:21,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 15:38:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:21,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:21,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:38:21,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:21,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:21,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:21,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:21,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:21,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:21,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125281070] [2020-10-12 15:38:21,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:21,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:21,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324363027] [2020-10-12 15:38:21,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:21,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:21,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:21,237 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-12 15:38:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:21,381 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-12 15:38:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:38:21,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-12 15:38:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:21,383 INFO L225 Difference]: With dead ends: 44 [2020-10-12 15:38:21,383 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:38:21,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:38:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-12 15:38:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 15:38:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-12 15:38:21,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2020-10-12 15:38:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:21,391 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-12 15:38:21,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-12 15:38:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:38:21,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:21,392 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:21,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:38:21,393 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash 221068705, now seen corresponding path program 1 times [2020-10-12 15:38:21,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:21,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097087749] [2020-10-12 15:38:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:38:21,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-12 15:38:21,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:38:21,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:21,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:21,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:21,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097087749] [2020-10-12 15:38:21,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:21,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:38:21,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237735730] [2020-10-12 15:38:21,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:21,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:21,572 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-10-12 15:38:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:21,727 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-12 15:38:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:38:21,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 15:38:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:21,728 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:38:21,729 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 15:38:21,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 15:38:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-12 15:38:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 15:38:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-12 15:38:21,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-10-12 15:38:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:21,735 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-12 15:38:21,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-12 15:38:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:21,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:21,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:21,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:38:21,737 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1418643305, now seen corresponding path program 1 times [2020-10-12 15:38:21,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:21,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157480125] [2020-10-12 15:38:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:21,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 15:38:21,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:38:21,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:21,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:21,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:21,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:21,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157480125] [2020-10-12 15:38:21,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:21,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:38:21,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125091654] [2020-10-12 15:38:21,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:21,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:21,929 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-12 15:38:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:22,069 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-12 15:38:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:38:22,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 15:38:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:22,070 INFO L225 Difference]: With dead ends: 48 [2020-10-12 15:38:22,070 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 15:38:22,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 15:38:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 15:38:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 15:38:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-12 15:38:22,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-12 15:38:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:22,077 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-12 15:38:22,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-12 15:38:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:22,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:22,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:22,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:38:22,078 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1939400262, now seen corresponding path program 2 times [2020-10-12 15:38:22,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:22,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112229223] [2020-10-12 15:38:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:22,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:22,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:22,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-12 15:38:22,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:38:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:22,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:22,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:22,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:22,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:22,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:22,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112229223] [2020-10-12 15:38:22,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:22,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:38:22,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55783501] [2020-10-12 15:38:22,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:38:22,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:38:22,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:22,876 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 10 states. [2020-10-12 15:38:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:23,309 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-12 15:38:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:38:23,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 15:38:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:23,311 INFO L225 Difference]: With dead ends: 83 [2020-10-12 15:38:23,311 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:38:23,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:38:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:38:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 53. [2020-10-12 15:38:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:38:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-12 15:38:23,321 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 27 [2020-10-12 15:38:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:23,321 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-12 15:38:23,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:38:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-12 15:38:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:23,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:23,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:23,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:38:23,323 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1344449784, now seen corresponding path program 1 times [2020-10-12 15:38:23,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:23,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157258510] [2020-10-12 15:38:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:23,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:23,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:23,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:23,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 15:38:23,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:23,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:23,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:23,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:23,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:23,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:23,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:23,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:23,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:23,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:23,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157258510] [2020-10-12 15:38:23,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:23,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:23,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119431181] [2020-10-12 15:38:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:23,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:23,661 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 9 states. [2020-10-12 15:38:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:24,070 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2020-10-12 15:38:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:38:24,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-12 15:38:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:24,072 INFO L225 Difference]: With dead ends: 101 [2020-10-12 15:38:24,073 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 15:38:24,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:38:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 15:38:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2020-10-12 15:38:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:38:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-12 15:38:24,082 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 27 [2020-10-12 15:38:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:24,082 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-12 15:38:24,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-12 15:38:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:24,084 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:24,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:38:24,084 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 666623292, now seen corresponding path program 2 times [2020-10-12 15:38:24,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:24,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083786155] [2020-10-12 15:38:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:24,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:25,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:25,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:25,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:38:25,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-12 15:38:25,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:25,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:25,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:25,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:25,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:25,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:25,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:25,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:25,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:25,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:25,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083786155] [2020-10-12 15:38:25,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:25,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:25,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489977135] [2020-10-12 15:38:25,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:25,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:25,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:25,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:25,404 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 12 states. [2020-10-12 15:38:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:26,178 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2020-10-12 15:38:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:38:26,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 15:38:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:26,180 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:38:26,180 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:38:26,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:38:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:38:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 58. [2020-10-12 15:38:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:38:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-12 15:38:26,189 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 27 [2020-10-12 15:38:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:26,189 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-12 15:38:26,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-12 15:38:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:26,190 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:26,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:38:26,191 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash 252280316, now seen corresponding path program 1 times [2020-10-12 15:38:26,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:26,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387066683] [2020-10-12 15:38:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:26,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:26,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:26,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:26,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:26,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:26,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:26,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387066683] [2020-10-12 15:38:26,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:26,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:26,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347992790] [2020-10-12 15:38:26,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:26,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:26,924 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 12 states. [2020-10-12 15:38:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:27,493 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2020-10-12 15:38:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:27,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-12 15:38:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:27,500 INFO L225 Difference]: With dead ends: 169 [2020-10-12 15:38:27,500 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:38:27,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:38:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:38:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 75. [2020-10-12 15:38:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:38:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2020-10-12 15:38:27,514 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 29 [2020-10-12 15:38:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:27,514 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2020-10-12 15:38:27,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2020-10-12 15:38:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:27,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:27,516 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:27,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:38:27,516 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash -758836934, now seen corresponding path program 1 times [2020-10-12 15:38:27,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:27,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997227364] [2020-10-12 15:38:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:27,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:27,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:27,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-12 15:38:27,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:27,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:27,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:27,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:27,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:27,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:27,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:27,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:27,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:27,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:27,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997227364] [2020-10-12 15:38:27,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:27,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:27,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501106110] [2020-10-12 15:38:27,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:27,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:27,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:27,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:27,813 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 9 states. [2020-10-12 15:38:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:28,274 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2020-10-12 15:38:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:38:28,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-12 15:38:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:28,276 INFO L225 Difference]: With dead ends: 144 [2020-10-12 15:38:28,277 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 15:38:28,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:38:28,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 15:38:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2020-10-12 15:38:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 15:38:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-12 15:38:28,304 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 29 [2020-10-12 15:38:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:28,305 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-12 15:38:28,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-12 15:38:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:28,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:28,311 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:28,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:38:28,313 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash -768788038, now seen corresponding path program 1 times [2020-10-12 15:38:28,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:28,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227911421] [2020-10-12 15:38:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:28,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:29,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:29,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:29,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:38:29,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-12 15:38:29,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:29,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:30,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:30,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:30,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:30,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:30,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:30,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227911421] [2020-10-12 15:38:30,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:30,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:30,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512728195] [2020-10-12 15:38:30,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:30,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:30,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:30,023 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 13 states. [2020-10-12 15:38:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:30,545 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-10-12 15:38:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:38:30,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 15:38:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:30,547 INFO L225 Difference]: With dead ends: 162 [2020-10-12 15:38:30,548 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 15:38:30,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:38:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 15:38:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 99. [2020-10-12 15:38:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:38:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2020-10-12 15:38:30,573 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 29 [2020-10-12 15:38:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:30,573 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2020-10-12 15:38:30,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2020-10-12 15:38:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:30,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:30,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:38:30,579 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1436663426, now seen corresponding path program 2 times [2020-10-12 15:38:30,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:30,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717035324] [2020-10-12 15:38:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:30,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:30,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:30,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-12 15:38:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:31,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:31,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:31,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:31,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:31,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:31,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:31,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:31,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717035324] [2020-10-12 15:38:31,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:31,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:31,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328335591] [2020-10-12 15:38:31,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:31,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:31,170 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand 13 states. [2020-10-12 15:38:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:32,067 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2020-10-12 15:38:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:32,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 15:38:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:32,069 INFO L225 Difference]: With dead ends: 145 [2020-10-12 15:38:32,069 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 15:38:32,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:38:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 15:38:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2020-10-12 15:38:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:38:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2020-10-12 15:38:32,081 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 29 [2020-10-12 15:38:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:32,081 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2020-10-12 15:38:32,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2020-10-12 15:38:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:32,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:32,083 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:32,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:38:32,083 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1847186620, now seen corresponding path program 1 times [2020-10-12 15:38:32,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:32,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066157396] [2020-10-12 15:38:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:32,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:32,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:32,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:32,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 15:38:32,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:32,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:38:32,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:32,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:32,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:32,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:32,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:32,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:32,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:32,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066157396] [2020-10-12 15:38:32,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:32,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:38:32,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067396895] [2020-10-12 15:38:32,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:38:32,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:38:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:32,377 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand 10 states. [2020-10-12 15:38:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:32,887 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2020-10-12 15:38:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:38:32,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-12 15:38:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:32,889 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:38:32,889 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 15:38:32,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:38:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 15:38:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2020-10-12 15:38:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:38:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-10-12 15:38:32,897 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 29 [2020-10-12 15:38:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:32,897 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-10-12 15:38:32,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:38:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-10-12 15:38:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:32,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:32,898 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:32,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:38:32,899 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2094339090, now seen corresponding path program 1 times [2020-10-12 15:38:32,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:32,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130086880] [2020-10-12 15:38:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:32,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:33,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:33,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:33,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 15:38:33,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:33,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:38:33,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:33,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:33,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:33,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:33,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:33,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:33,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130086880] [2020-10-12 15:38:33,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:33,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:33,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287838914] [2020-10-12 15:38:33,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:33,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:33,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:33,145 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2020-10-12 15:38:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:33,328 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2020-10-12 15:38:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:38:33,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-12 15:38:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:33,329 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:38:33,329 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:38:33,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:38:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-12 15:38:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:38:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-10-12 15:38:33,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 32 [2020-10-12 15:38:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:33,348 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-10-12 15:38:33,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-10-12 15:38:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:33,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:33,349 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:33,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:38:33,349 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1379592393, now seen corresponding path program 3 times [2020-10-12 15:38:33,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:33,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138910173] [2020-10-12 15:38:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:33,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-12 15:38:33,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 15:38:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:33,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:33,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:33,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:33,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:33,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:33,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:33,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:33,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:33,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138910173] [2020-10-12 15:38:33,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:33,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:33,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409693025] [2020-10-12 15:38:33,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:33,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:33,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:33,830 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 12 states. [2020-10-12 15:38:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:34,375 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2020-10-12 15:38:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:38:34,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 15:38:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:34,376 INFO L225 Difference]: With dead ends: 202 [2020-10-12 15:38:34,376 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 15:38:34,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:38:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 15:38:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 98. [2020-10-12 15:38:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 15:38:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-10-12 15:38:34,399 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 32 [2020-10-12 15:38:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:34,399 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-10-12 15:38:34,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-10-12 15:38:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:34,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:34,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:38:34,400 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -208755509, now seen corresponding path program 1 times [2020-10-12 15:38:34,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:34,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891500748] [2020-10-12 15:38:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:34,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:34,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:34,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 15:38:34,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:34,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:34,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:38:34,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:34,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:34,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:34,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:34,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:34,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:34,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:34,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:34,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:34,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:38:34,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891500748] [2020-10-12 15:38:34,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:34,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:34,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224821446] [2020-10-12 15:38:34,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:34,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:34,655 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 9 states. [2020-10-12 15:38:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:35,039 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-10-12 15:38:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:38:35,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-12 15:38:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:35,041 INFO L225 Difference]: With dead ends: 148 [2020-10-12 15:38:35,041 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 15:38:35,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 15:38:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 44. [2020-10-12 15:38:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:38:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-12 15:38:35,052 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2020-10-12 15:38:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:35,053 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-12 15:38:35,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-12 15:38:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:35,054 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:35,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:38:35,054 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 715214079, now seen corresponding path program 2 times [2020-10-12 15:38:35,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:35,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651089798] [2020-10-12 15:38:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:37,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:37,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2905 [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:38,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:38,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:38,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:38,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:38,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:38,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651089798] [2020-10-12 15:38:38,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:38,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:38:38,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047528736] [2020-10-12 15:38:38,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:38:38,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:38:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:38,345 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 17 states. [2020-10-12 15:38:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:40,744 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2020-10-12 15:38:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:38:40,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 15:38:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:40,753 INFO L225 Difference]: With dead ends: 172 [2020-10-12 15:38:40,753 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 15:38:40,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:38:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 15:38:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 84. [2020-10-12 15:38:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 15:38:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-12 15:38:40,769 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 37 [2020-10-12 15:38:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:40,769 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-12 15:38:40,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:38:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-12 15:38:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:40,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:40,770 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:40,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:38:40,770 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash 614618239, now seen corresponding path program 4 times [2020-10-12 15:38:40,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:40,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355045656] [2020-10-12 15:38:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:41,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:41,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:41,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:41,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:41,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355045656] [2020-10-12 15:38:41,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:41,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:41,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355692778] [2020-10-12 15:38:41,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:41,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:41,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:41,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:41,515 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 12 states. [2020-10-12 15:38:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:43,003 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2020-10-12 15:38:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:38:43,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 15:38:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:43,006 INFO L225 Difference]: With dead ends: 209 [2020-10-12 15:38:43,010 INFO L226 Difference]: Without dead ends: 207 [2020-10-12 15:38:43,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:38:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-12 15:38:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 88. [2020-10-12 15:38:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:38:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2020-10-12 15:38:43,027 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 37 [2020-10-12 15:38:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:43,028 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2020-10-12 15:38:43,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2020-10-12 15:38:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:43,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:43,029 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:43,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:38:43,030 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 581200573, now seen corresponding path program 2 times [2020-10-12 15:38:43,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:43,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8784362] [2020-10-12 15:38:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:43,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:43,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:43,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:43,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 15:38:43,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:43,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:43,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:43,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:43,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:43,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:43,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:43,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:43,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:43,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:43,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8784362] [2020-10-12 15:38:43,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:43,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:43,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478326238] [2020-10-12 15:38:43,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:43,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:43,498 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand 12 states. [2020-10-12 15:38:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:44,289 INFO L93 Difference]: Finished difference Result 183 states and 211 transitions. [2020-10-12 15:38:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:44,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 15:38:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:44,291 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:38:44,291 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 15:38:44,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:38:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 15:38:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 97. [2020-10-12 15:38:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:38:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2020-10-12 15:38:44,316 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 37 [2020-10-12 15:38:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:44,316 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2020-10-12 15:38:44,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2020-10-12 15:38:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:44,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:44,317 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:44,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:38:44,318 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 480604733, now seen corresponding path program 5 times [2020-10-12 15:38:44,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:44,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321231882] [2020-10-12 15:38:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:44,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:44,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:44,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:44,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-12 15:38:44,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:38:44,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:44,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:44,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:44,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:44,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:44,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:44,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:44,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:44,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:44,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:44,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:44,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:44,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321231882] [2020-10-12 15:38:44,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:44,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:38:44,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933907444] [2020-10-12 15:38:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:38:44,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:38:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:44,721 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 11 states. [2020-10-12 15:38:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:45,496 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2020-10-12 15:38:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:45,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-12 15:38:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:45,498 INFO L225 Difference]: With dead ends: 190 [2020-10-12 15:38:45,499 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 15:38:45,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:38:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 15:38:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 109. [2020-10-12 15:38:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 15:38:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-10-12 15:38:45,519 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 37 [2020-10-12 15:38:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:45,519 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-12 15:38:45,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:38:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2020-10-12 15:38:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:45,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:45,520 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:45,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:38:45,521 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2101417473, now seen corresponding path program 3 times [2020-10-12 15:38:45,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:45,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676513785] [2020-10-12 15:38:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:45,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:48,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:48,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:48,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:38:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2656 [2020-10-12 15:38:48,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:38:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:48,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:48,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:48,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:48,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676513785] [2020-10-12 15:38:48,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:48,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:38:48,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930757827] [2020-10-12 15:38:48,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:38:48,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:38:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:48,560 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 17 states. [2020-10-12 15:38:49,836 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-12 15:38:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:50,952 INFO L93 Difference]: Finished difference Result 273 states and 320 transitions. [2020-10-12 15:38:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:38:50,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 15:38:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:50,956 INFO L225 Difference]: With dead ends: 273 [2020-10-12 15:38:50,956 INFO L226 Difference]: Without dead ends: 271 [2020-10-12 15:38:50,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:38:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-12 15:38:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 114. [2020-10-12 15:38:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 15:38:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2020-10-12 15:38:50,975 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 37 [2020-10-12 15:38:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:50,975 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2020-10-12 15:38:50,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:38:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2020-10-12 15:38:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:50,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:50,976 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:50,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:38:50,976 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2000821633, now seen corresponding path program 6 times [2020-10-12 15:38:50,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:50,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877449833] [2020-10-12 15:38:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:52,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:53,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2280 [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:38:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:53,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:53,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:53,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:38:53,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877449833] [2020-10-12 15:38:53,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:53,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681656298] [2020-10-12 15:38:53,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:53,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:53,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:53,459 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand 15 states. [2020-10-12 15:38:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:54,009 INFO L93 Difference]: Finished difference Result 327 states and 409 transitions. [2020-10-12 15:38:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:54,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:38:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:54,012 INFO L225 Difference]: With dead ends: 327 [2020-10-12 15:38:54,012 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 15:38:54,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:38:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 15:38:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 168. [2020-10-12 15:38:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-12 15:38:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 229 transitions. [2020-10-12 15:38:54,048 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 229 transitions. Word has length 37 [2020-10-12 15:38:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:54,048 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 229 transitions. [2020-10-12 15:38:54,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:38:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 229 transitions. [2020-10-12 15:38:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:38:54,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:54,049 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:54,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:38:54,050 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1974695105, now seen corresponding path program 4 times [2020-10-12 15:38:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:54,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601872486] [2020-10-12 15:38:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:54,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:38:59,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:38:59,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:38:59,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:38:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:38:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:59,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:59,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:59,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:59,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601872486] [2020-10-12 15:38:59,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:59,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:59,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972563092] [2020-10-12 15:38:59,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:59,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:59,481 INFO L87 Difference]: Start difference. First operand 168 states and 229 transitions. Second operand 15 states. [2020-10-12 15:39:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:02,290 INFO L93 Difference]: Finished difference Result 635 states and 791 transitions. [2020-10-12 15:39:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:39:02,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:39:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:02,294 INFO L225 Difference]: With dead ends: 635 [2020-10-12 15:39:02,294 INFO L226 Difference]: Without dead ends: 633 [2020-10-12 15:39:02,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:39:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-12 15:39:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 271. [2020-10-12 15:39:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 15:39:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 386 transitions. [2020-10-12 15:39:02,332 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 386 transitions. Word has length 37 [2020-10-12 15:39:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:02,333 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 386 transitions. [2020-10-12 15:39:02,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 386 transitions. [2020-10-12 15:39:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:02,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:02,334 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:02,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:39:02,334 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2075290945, now seen corresponding path program 5 times [2020-10-12 15:39:02,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:02,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645837001] [2020-10-12 15:39:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:02,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1789 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:04,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:04,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:04,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645837001] [2020-10-12 15:39:04,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:04,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:04,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458671784] [2020-10-12 15:39:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:04,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:04,420 INFO L87 Difference]: Start difference. First operand 271 states and 386 transitions. Second operand 15 states. [2020-10-12 15:39:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:06,408 INFO L93 Difference]: Finished difference Result 496 states and 650 transitions. [2020-10-12 15:39:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:39:06,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:39:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:06,412 INFO L225 Difference]: With dead ends: 496 [2020-10-12 15:39:06,413 INFO L226 Difference]: Without dead ends: 494 [2020-10-12 15:39:06,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:39:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-10-12 15:39:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 291. [2020-10-12 15:39:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 15:39:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 416 transitions. [2020-10-12 15:39:06,466 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 416 transitions. Word has length 37 [2020-10-12 15:39:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:06,466 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 416 transitions. [2020-10-12 15:39:06,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 416 transitions. [2020-10-12 15:39:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:06,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:06,467 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:06,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:39:06,468 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1967403967, now seen corresponding path program 6 times [2020-10-12 15:39:06,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:06,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607577597] [2020-10-12 15:39:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:06,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:07,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:07,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:07,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:07,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:07,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:07,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:07,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:07,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607577597] [2020-10-12 15:39:07,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:07,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:07,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807683749] [2020-10-12 15:39:07,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:07,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:07,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:07,724 INFO L87 Difference]: Start difference. First operand 291 states and 416 transitions. Second operand 14 states. [2020-10-12 15:39:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:09,491 INFO L93 Difference]: Finished difference Result 457 states and 600 transitions. [2020-10-12 15:39:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:39:09,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 15:39:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:09,494 INFO L225 Difference]: With dead ends: 457 [2020-10-12 15:39:09,494 INFO L226 Difference]: Without dead ends: 455 [2020-10-12 15:39:09,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:39:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-12 15:39:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 245. [2020-10-12 15:39:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-12 15:39:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 347 transitions. [2020-10-12 15:39:09,532 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 347 transitions. Word has length 37 [2020-10-12 15:39:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:09,532 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 347 transitions. [2020-10-12 15:39:09,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 347 transitions. [2020-10-12 15:39:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:09,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:09,533 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:39:09,534 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash 126088193, now seen corresponding path program 3 times [2020-10-12 15:39:09,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:09,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272041767] [2020-10-12 15:39:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-12 15:39:09,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:10,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:10,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:10,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272041767] [2020-10-12 15:39:10,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:10,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:10,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472570619] [2020-10-12 15:39:10,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:10,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:10,041 INFO L87 Difference]: Start difference. First operand 245 states and 347 transitions. Second operand 13 states. [2020-10-12 15:39:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:12,005 INFO L93 Difference]: Finished difference Result 506 states and 645 transitions. [2020-10-12 15:39:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:39:12,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-12 15:39:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:12,010 INFO L225 Difference]: With dead ends: 506 [2020-10-12 15:39:12,011 INFO L226 Difference]: Without dead ends: 504 [2020-10-12 15:39:12,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:39:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-12 15:39:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 336. [2020-10-12 15:39:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-12 15:39:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 473 transitions. [2020-10-12 15:39:12,105 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 473 transitions. Word has length 39 [2020-10-12 15:39:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:12,105 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 473 transitions. [2020-10-12 15:39:12,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 473 transitions. [2020-10-12 15:39:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:12,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:12,106 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:12,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:39:12,107 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash -7925313, now seen corresponding path program 4 times [2020-10-12 15:39:12,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:12,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662303222] [2020-10-12 15:39:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:12,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:12,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:12,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:12,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:12,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662303222] [2020-10-12 15:39:12,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:12,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:12,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958304666] [2020-10-12 15:39:12,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:12,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:12,469 INFO L87 Difference]: Start difference. First operand 336 states and 473 transitions. Second operand 11 states. [2020-10-12 15:39:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:13,299 INFO L93 Difference]: Finished difference Result 489 states and 641 transitions. [2020-10-12 15:39:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:13,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-12 15:39:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:13,303 INFO L225 Difference]: With dead ends: 489 [2020-10-12 15:39:13,303 INFO L226 Difference]: Without dead ends: 487 [2020-10-12 15:39:13,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-12 15:39:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 364. [2020-10-12 15:39:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-12 15:39:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 515 transitions. [2020-10-12 15:39:13,366 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 515 transitions. Word has length 39 [2020-10-12 15:39:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:13,366 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 515 transitions. [2020-10-12 15:39:13,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 515 transitions. [2020-10-12 15:39:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:13,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:13,368 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:13,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:39:13,368 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2103720255, now seen corresponding path program 1 times [2020-10-12 15:39:13,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:13,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287107537] [2020-10-12 15:39:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:13,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:13,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:13,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 15:39:13,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:13,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:13,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:13,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:13,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287107537] [2020-10-12 15:39:13,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:13,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:13,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174902057] [2020-10-12 15:39:13,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:13,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:13,763 INFO L87 Difference]: Start difference. First operand 364 states and 515 transitions. Second operand 13 states. [2020-10-12 15:39:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:14,784 INFO L93 Difference]: Finished difference Result 506 states and 660 transitions. [2020-10-12 15:39:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:14,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-12 15:39:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:14,789 INFO L225 Difference]: With dead ends: 506 [2020-10-12 15:39:14,789 INFO L226 Difference]: Without dead ends: 504 [2020-10-12 15:39:14,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:39:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-12 15:39:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 368. [2020-10-12 15:39:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 15:39:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 521 transitions. [2020-10-12 15:39:14,846 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 521 transitions. Word has length 39 [2020-10-12 15:39:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:14,847 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 521 transitions. [2020-10-12 15:39:14,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 521 transitions. [2020-10-12 15:39:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:14,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:14,848 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:14,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:39:14,849 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:14,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1512291587, now seen corresponding path program 5 times [2020-10-12 15:39:14,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:14,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211817499] [2020-10-12 15:39:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:14,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:15,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:15,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:15,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:15,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:15,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:15,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:15,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:15,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:15,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:15,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:15,846 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 15:39:15,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211817499] [2020-10-12 15:39:15,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:15,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:39:15,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870073256] [2020-10-12 15:39:15,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:39:15,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:39:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:15,848 INFO L87 Difference]: Start difference. First operand 368 states and 521 transitions. Second operand 17 states. [2020-10-12 15:39:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:18,596 INFO L93 Difference]: Finished difference Result 569 states and 749 transitions. [2020-10-12 15:39:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:39:18,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 15:39:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:18,600 INFO L225 Difference]: With dead ends: 569 [2020-10-12 15:39:18,600 INFO L226 Difference]: Without dead ends: 567 [2020-10-12 15:39:18,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:39:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2020-10-12 15:39:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 403. [2020-10-12 15:39:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 15:39:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 575 transitions. [2020-10-12 15:39:18,679 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 575 transitions. Word has length 39 [2020-10-12 15:39:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:18,680 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 575 transitions. [2020-10-12 15:39:18,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:39:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 575 transitions. [2020-10-12 15:39:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:18,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:18,681 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:18,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:39:18,682 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash -671030141, now seen corresponding path program 2 times [2020-10-12 15:39:18,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:18,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631675529] [2020-10-12 15:39:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:21,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:21,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:21,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:39:21,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3175 [2020-10-12 15:39:21,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:21,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:39:21,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:21,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:21,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:22,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:22,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:22,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631675529] [2020-10-12 15:39:22,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:22,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:39:22,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557380925] [2020-10-12 15:39:22,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:39:22,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:22,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:39:22,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:22,393 INFO L87 Difference]: Start difference. First operand 403 states and 575 transitions. Second operand 19 states. [2020-10-12 15:39:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:24,668 INFO L93 Difference]: Finished difference Result 496 states and 669 transitions. [2020-10-12 15:39:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:39:24,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-10-12 15:39:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:24,672 INFO L225 Difference]: With dead ends: 496 [2020-10-12 15:39:24,672 INFO L226 Difference]: Without dead ends: 494 [2020-10-12 15:39:24,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:39:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-10-12 15:39:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 394. [2020-10-12 15:39:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-12 15:39:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 562 transitions. [2020-10-12 15:39:24,733 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 562 transitions. Word has length 39 [2020-10-12 15:39:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:24,734 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 562 transitions. [2020-10-12 15:39:24,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:39:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 562 transitions. [2020-10-12 15:39:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:24,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:24,735 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:24,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:39:24,735 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -805043647, now seen corresponding path program 3 times [2020-10-12 15:39:24,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:24,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922475983] [2020-10-12 15:39:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:24,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:24,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:24,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:25,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:25,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:25,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:25,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:25,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:25,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922475983] [2020-10-12 15:39:25,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:25,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:25,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561571060] [2020-10-12 15:39:25,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:25,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:25,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:25,139 INFO L87 Difference]: Start difference. First operand 394 states and 562 transitions. Second operand 14 states. [2020-10-12 15:39:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:26,519 INFO L93 Difference]: Finished difference Result 470 states and 639 transitions. [2020-10-12 15:39:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:26,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 15:39:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:26,522 INFO L225 Difference]: With dead ends: 470 [2020-10-12 15:39:26,522 INFO L226 Difference]: Without dead ends: 468 [2020-10-12 15:39:26,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:39:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-12 15:39:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 382. [2020-10-12 15:39:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-12 15:39:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 544 transitions. [2020-10-12 15:39:26,592 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 544 transitions. Word has length 39 [2020-10-12 15:39:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:26,592 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 544 transitions. [2020-10-12 15:39:26,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 544 transitions. [2020-10-12 15:39:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:26,593 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:26,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:39:26,594 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1800979907, now seen corresponding path program 1 times [2020-10-12 15:39:26,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:26,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196751406] [2020-10-12 15:39:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:26,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:39:26,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:26,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:26,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:26,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:26,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:26,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:26,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:26,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:26,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196751406] [2020-10-12 15:39:26,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:26,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:26,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862596181] [2020-10-12 15:39:26,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:26,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:26,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:26,936 INFO L87 Difference]: Start difference. First operand 382 states and 544 transitions. Second operand 12 states. [2020-10-12 15:39:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:28,153 INFO L93 Difference]: Finished difference Result 407 states and 569 transitions. [2020-10-12 15:39:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:39:28,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-12 15:39:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:28,157 INFO L225 Difference]: With dead ends: 407 [2020-10-12 15:39:28,157 INFO L226 Difference]: Without dead ends: 405 [2020-10-12 15:39:28,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:39:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-12 15:39:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 250. [2020-10-12 15:39:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 15:39:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 353 transitions. [2020-10-12 15:39:28,208 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 353 transitions. Word has length 39 [2020-10-12 15:39:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:28,208 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 353 transitions. [2020-10-12 15:39:28,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 353 transitions. [2020-10-12 15:39:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:28,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:28,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:28,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:39:28,210 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1799143481, now seen corresponding path program 3 times [2020-10-12 15:39:28,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:28,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553269347] [2020-10-12 15:39:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:29,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:29,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:29,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-12 15:39:29,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:29,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:29,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:29,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:29,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553269347] [2020-10-12 15:39:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:29,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:29,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544687473] [2020-10-12 15:39:29,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:29,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:29,332 INFO L87 Difference]: Start difference. First operand 250 states and 353 transitions. Second operand 13 states. [2020-10-12 15:39:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:30,757 INFO L93 Difference]: Finished difference Result 384 states and 502 transitions. [2020-10-12 15:39:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:39:30,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-12 15:39:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:30,761 INFO L225 Difference]: With dead ends: 384 [2020-10-12 15:39:30,761 INFO L226 Difference]: Without dead ends: 345 [2020-10-12 15:39:30,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:39:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-12 15:39:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 268. [2020-10-12 15:39:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 15:39:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 377 transitions. [2020-10-12 15:39:30,807 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 377 transitions. Word has length 42 [2020-10-12 15:39:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:30,808 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 377 transitions. [2020-10-12 15:39:30,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 377 transitions. [2020-10-12 15:39:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:30,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:30,809 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:30,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:39:30,809 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2142955591, now seen corresponding path program 7 times [2020-10-12 15:39:30,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:30,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931131382] [2020-10-12 15:39:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:31,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:31,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:31,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:31,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931131382] [2020-10-12 15:39:31,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:31,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:31,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048251963] [2020-10-12 15:39:31,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:31,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:31,729 INFO L87 Difference]: Start difference. First operand 268 states and 377 transitions. Second operand 14 states. [2020-10-12 15:39:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:32,833 INFO L93 Difference]: Finished difference Result 430 states and 550 transitions. [2020-10-12 15:39:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:39:32,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:39:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:32,836 INFO L225 Difference]: With dead ends: 430 [2020-10-12 15:39:32,836 INFO L226 Difference]: Without dead ends: 406 [2020-10-12 15:39:32,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:39:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-12 15:39:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 268. [2020-10-12 15:39:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 15:39:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 377 transitions. [2020-10-12 15:39:32,877 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 377 transitions. Word has length 42 [2020-10-12 15:39:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:32,877 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 377 transitions. [2020-10-12 15:39:32,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 377 transitions. [2020-10-12 15:39:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:32,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:32,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:32,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:39:32,879 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash 124084553, now seen corresponding path program 4 times [2020-10-12 15:39:32,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:32,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465456065] [2020-10-12 15:39:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:32,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:33,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:33,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:33,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 15:39:33,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:39:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:33,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:33,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:33,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465456065] [2020-10-12 15:39:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866831161] [2020-10-12 15:39:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:33,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:33,180 INFO L87 Difference]: Start difference. First operand 268 states and 377 transitions. Second operand 11 states. [2020-10-12 15:39:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:33,565 INFO L93 Difference]: Finished difference Result 413 states and 567 transitions. [2020-10-12 15:39:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:33,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-12 15:39:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:33,568 INFO L225 Difference]: With dead ends: 413 [2020-10-12 15:39:33,568 INFO L226 Difference]: Without dead ends: 387 [2020-10-12 15:39:33,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-12 15:39:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 333. [2020-10-12 15:39:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-12 15:39:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 464 transitions. [2020-10-12 15:39:33,610 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 464 transitions. Word has length 42 [2020-10-12 15:39:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:33,610 INFO L479 AbstractCegarLoop]: Abstraction has 333 states and 464 transitions. [2020-10-12 15:39:33,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 464 transitions. [2020-10-12 15:39:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:33,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:33,611 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:33,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:39:33,612 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1432038066, now seen corresponding path program 7 times [2020-10-12 15:39:33,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:33,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054753682] [2020-10-12 15:39:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 15:39:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:39:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:34,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:34,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:34,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054753682] [2020-10-12 15:39:34,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:34,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:34,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604324273] [2020-10-12 15:39:34,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:34,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:34,379 INFO L87 Difference]: Start difference. First operand 333 states and 464 transitions. Second operand 15 states. [2020-10-12 15:39:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:35,535 INFO L93 Difference]: Finished difference Result 633 states and 821 transitions. [2020-10-12 15:39:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:35,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-12 15:39:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:35,539 INFO L225 Difference]: With dead ends: 633 [2020-10-12 15:39:35,540 INFO L226 Difference]: Without dead ends: 631 [2020-10-12 15:39:35,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-12 15:39:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 395. [2020-10-12 15:39:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-12 15:39:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 556 transitions. [2020-10-12 15:39:35,615 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 556 transitions. Word has length 42 [2020-10-12 15:39:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:35,615 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 556 transitions. [2020-10-12 15:39:35,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 556 transitions. [2020-10-12 15:39:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:35,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:35,617 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:35,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:39:35,617 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1532633906, now seen corresponding path program 8 times [2020-10-12 15:39:35,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:35,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6093520] [2020-10-12 15:39:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:35,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:35,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:36,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:39:36,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:36,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:36,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:36,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:36,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:36,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:36,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6093520] [2020-10-12 15:39:36,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:36,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:36,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235551883] [2020-10-12 15:39:36,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:36,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:36,298 INFO L87 Difference]: Start difference. First operand 395 states and 556 transitions. Second operand 14 states. [2020-10-12 15:39:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:37,389 INFO L93 Difference]: Finished difference Result 643 states and 839 transitions. [2020-10-12 15:39:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:39:37,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:39:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:37,392 INFO L225 Difference]: With dead ends: 643 [2020-10-12 15:39:37,392 INFO L226 Difference]: Without dead ends: 641 [2020-10-12 15:39:37,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:39:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-12 15:39:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 413. [2020-10-12 15:39:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-12 15:39:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 583 transitions. [2020-10-12 15:39:37,465 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 583 transitions. Word has length 42 [2020-10-12 15:39:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:37,465 INFO L479 AbstractCegarLoop]: Abstraction has 413 states and 583 transitions. [2020-10-12 15:39:37,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 583 transitions. [2020-10-12 15:39:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:37,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:37,466 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:37,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:39:37,466 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:37,467 INFO L82 PathProgramCache]: Analyzing trace with hash 491189968, now seen corresponding path program 8 times [2020-10-12 15:39:37,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:37,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952415770] [2020-10-12 15:39:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:37,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:37,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:37,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:37,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-12 15:39:37,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:39:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:37,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:37,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:37,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:37,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:37,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:37,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:37,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:37,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:37,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:37,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:39:38,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952415770] [2020-10-12 15:39:38,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:38,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:38,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385314566] [2020-10-12 15:39:38,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:38,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:38,007 INFO L87 Difference]: Start difference. First operand 413 states and 583 transitions. Second operand 12 states. [2020-10-12 15:39:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:38,899 INFO L93 Difference]: Finished difference Result 580 states and 785 transitions. [2020-10-12 15:39:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:38,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-12 15:39:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:38,902 INFO L225 Difference]: With dead ends: 580 [2020-10-12 15:39:38,902 INFO L226 Difference]: Without dead ends: 578 [2020-10-12 15:39:38,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-12 15:39:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 259. [2020-10-12 15:39:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 15:39:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 351 transitions. [2020-10-12 15:39:38,946 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 351 transitions. Word has length 42 [2020-10-12 15:39:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:38,946 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 351 transitions. [2020-10-12 15:39:38,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 351 transitions. [2020-10-12 15:39:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:38,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:38,947 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:38,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:39:38,947 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash 390594128, now seen corresponding path program 9 times [2020-10-12 15:39:38,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:38,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977376881] [2020-10-12 15:39:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:39,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:39:39,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977376881] [2020-10-12 15:39:39,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:39,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:39,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973649295] [2020-10-12 15:39:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:39,248 INFO L87 Difference]: Start difference. First operand 259 states and 351 transitions. Second operand 11 states. [2020-10-12 15:39:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:40,298 INFO L93 Difference]: Finished difference Result 358 states and 460 transitions. [2020-10-12 15:39:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:39:40,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-12 15:39:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:40,300 INFO L225 Difference]: With dead ends: 358 [2020-10-12 15:39:40,300 INFO L226 Difference]: Without dead ends: 356 [2020-10-12 15:39:40,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:39:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-12 15:39:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 137. [2020-10-12 15:39:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 15:39:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 180 transitions. [2020-10-12 15:39:40,326 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 180 transitions. Word has length 42 [2020-10-12 15:39:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:40,326 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 180 transitions. [2020-10-12 15:39:40,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 180 transitions. [2020-10-12 15:39:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:39:40,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:40,327 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:40,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:39:40,327 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -565812966, now seen corresponding path program 5 times [2020-10-12 15:39:40,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:40,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601209050] [2020-10-12 15:39:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:43,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:45,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:45,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:39:45,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:39:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:39:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:39:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:39:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:45,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:45,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:45,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:45,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:45,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:45,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:45,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:45,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:45,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:45,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601209050] [2020-10-12 15:39:45,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:45,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:39:45,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800891683] [2020-10-12 15:39:45,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:39:45,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:45,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:39:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:45,958 INFO L87 Difference]: Start difference. First operand 137 states and 180 transitions. Second operand 19 states. [2020-10-12 15:39:47,242 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 15:39:47,588 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:39:47,898 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-12 15:39:48,189 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:39:48,758 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:39:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:49,623 INFO L93 Difference]: Finished difference Result 299 states and 360 transitions. [2020-10-12 15:39:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:39:49,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:39:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:49,625 INFO L225 Difference]: With dead ends: 299 [2020-10-12 15:39:49,625 INFO L226 Difference]: Without dead ends: 297 [2020-10-12 15:39:49,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:39:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-12 15:39:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 187. [2020-10-12 15:39:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 15:39:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2020-10-12 15:39:49,685 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 47 [2020-10-12 15:39:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:49,685 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2020-10-12 15:39:49,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:39:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2020-10-12 15:39:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:39:49,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:49,686 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:49,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:39:49,686 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash -918681190, now seen corresponding path program 10 times [2020-10-12 15:39:49,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:49,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545130747] [2020-10-12 15:39:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:49,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:49,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:39:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:39:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:51,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:51,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545130747] [2020-10-12 15:39:51,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:51,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:39:51,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500709563] [2020-10-12 15:39:51,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:39:51,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:39:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:51,426 INFO L87 Difference]: Start difference. First operand 187 states and 243 transitions. Second operand 19 states. [2020-10-12 15:39:52,440 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-12 15:39:52,740 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 15:39:53,633 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-12 15:39:54,127 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-12 15:39:54,686 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-12 15:39:55,134 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-12 15:39:55,308 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:39:55,572 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:39:56,289 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-12 15:39:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:56,471 INFO L93 Difference]: Finished difference Result 323 states and 384 transitions. [2020-10-12 15:39:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 15:39:56,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:39:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:56,473 INFO L225 Difference]: With dead ends: 323 [2020-10-12 15:39:56,473 INFO L226 Difference]: Without dead ends: 321 [2020-10-12 15:39:56,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=433, Invalid=2429, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:39:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-12 15:39:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 189. [2020-10-12 15:39:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 15:39:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 246 transitions. [2020-10-12 15:39:56,513 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 246 transitions. Word has length 47 [2020-10-12 15:39:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:56,513 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 246 transitions. [2020-10-12 15:39:56,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:39:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 246 transitions. [2020-10-12 15:39:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:39:56,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:56,514 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:56,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:39:56,515 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1102837606, now seen corresponding path program 11 times [2020-10-12 15:39:56,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:56,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147492313] [2020-10-12 15:39:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:39:57,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:39:57,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:57,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:57,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:57,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:57,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:57,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:57,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147492313] [2020-10-12 15:39:57,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:57,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:57,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412733145] [2020-10-12 15:39:57,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:57,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:57,864 INFO L87 Difference]: Start difference. First operand 189 states and 246 transitions. Second operand 16 states. [2020-10-12 15:39:59,295 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2020-10-12 15:39:59,437 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-12 15:39:59,846 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-12 15:40:00,150 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2020-10-12 15:40:00,436 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-12 15:40:00,723 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-12 15:40:00,875 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-12 15:40:01,304 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 15:40:01,612 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-10-12 15:40:01,777 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:40:02,039 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-12 15:40:02,316 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:40:02,647 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-12 15:40:02,795 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-12 15:40:03,390 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-12 15:40:03,548 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-12 15:40:04,285 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-12 15:40:04,737 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-12 15:40:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:05,105 INFO L93 Difference]: Finished difference Result 768 states and 919 transitions. [2020-10-12 15:40:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 15:40:05,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-12 15:40:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:05,108 INFO L225 Difference]: With dead ends: 768 [2020-10-12 15:40:05,109 INFO L226 Difference]: Without dead ends: 766 [2020-10-12 15:40:05,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=877, Invalid=4379, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 15:40:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-10-12 15:40:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 301. [2020-10-12 15:40:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-12 15:40:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 408 transitions. [2020-10-12 15:40:05,182 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 408 transitions. Word has length 47 [2020-10-12 15:40:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:05,183 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 408 transitions. [2020-10-12 15:40:05,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 408 transitions. [2020-10-12 15:40:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:05,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:05,185 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:05,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:40:05,185 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1485171032, now seen corresponding path program 12 times [2020-10-12 15:40:05,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:05,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887176954] [2020-10-12 15:40:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:06,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:06,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:06,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887176954] [2020-10-12 15:40:06,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:06,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:40:06,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409070105] [2020-10-12 15:40:06,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:40:06,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:40:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:40:06,142 INFO L87 Difference]: Start difference. First operand 301 states and 408 transitions. Second operand 16 states. [2020-10-12 15:40:07,467 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-12 15:40:07,761 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:40:08,045 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-12 15:40:08,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 15:40:08,807 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-12 15:40:09,067 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:40:09,275 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-12 15:40:09,460 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:40:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:10,646 INFO L93 Difference]: Finished difference Result 558 states and 697 transitions. [2020-10-12 15:40:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:40:10,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-12 15:40:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:10,651 INFO L225 Difference]: With dead ends: 558 [2020-10-12 15:40:10,651 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 15:40:10,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:40:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 15:40:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 357. [2020-10-12 15:40:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-12 15:40:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 491 transitions. [2020-10-12 15:40:10,743 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 491 transitions. Word has length 47 [2020-10-12 15:40:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:10,743 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 491 transitions. [2020-10-12 15:40:10,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 491 transitions. [2020-10-12 15:40:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:10,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:10,744 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:10,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:40:10,744 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:10,744 INFO L82 PathProgramCache]: Analyzing trace with hash 948146392, now seen corresponding path program 13 times [2020-10-12 15:40:10,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:10,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570952811] [2020-10-12 15:40:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:11,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:11,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:11,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:11,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:11,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570952811] [2020-10-12 15:40:11,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:11,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:11,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387878715] [2020-10-12 15:40:11,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:11,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:11,258 INFO L87 Difference]: Start difference. First operand 357 states and 491 transitions. Second operand 14 states. [2020-10-12 15:40:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:12,607 INFO L93 Difference]: Finished difference Result 541 states and 696 transitions. [2020-10-12 15:40:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:40:12,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-12 15:40:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:12,611 INFO L225 Difference]: With dead ends: 541 [2020-10-12 15:40:12,611 INFO L226 Difference]: Without dead ends: 539 [2020-10-12 15:40:12,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:40:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-12 15:40:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 393. [2020-10-12 15:40:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-12 15:40:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2020-10-12 15:40:12,754 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 47 [2020-10-12 15:40:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:12,754 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2020-10-12 15:40:12,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2020-10-12 15:40:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:12,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:12,756 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:12,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:40:12,757 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 595278168, now seen corresponding path program 9 times [2020-10-12 15:40:12,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:12,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498772211] [2020-10-12 15:40:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:13,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:13,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:13,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:13,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:13,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:13,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498772211] [2020-10-12 15:40:13,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:13,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:40:13,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597802723] [2020-10-12 15:40:13,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:40:13,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:40:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:40:13,315 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand 13 states. [2020-10-12 15:40:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:15,179 INFO L93 Difference]: Finished difference Result 546 states and 706 transitions. [2020-10-12 15:40:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:40:15,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-12 15:40:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:15,183 INFO L225 Difference]: With dead ends: 546 [2020-10-12 15:40:15,183 INFO L226 Difference]: Without dead ends: 544 [2020-10-12 15:40:15,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:40:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-12 15:40:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2020-10-12 15:40:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 15:40:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 563 transitions. [2020-10-12 15:40:15,280 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 563 transitions. Word has length 47 [2020-10-12 15:40:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:15,280 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 563 transitions. [2020-10-12 15:40:15,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:40:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 563 transitions. [2020-10-12 15:40:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:15,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:15,281 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:15,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:40:15,282 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1883787164, now seen corresponding path program 14 times [2020-10-12 15:40:15,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:15,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556410906] [2020-10-12 15:40:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:20,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:20,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:20,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:40:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:40:20,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:40:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:20,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:20,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:20,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556410906] [2020-10-12 15:40:20,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:40:20,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556066415] [2020-10-12 15:40:20,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:40:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:40:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:40:20,899 INFO L87 Difference]: Start difference. First operand 403 states and 563 transitions. Second operand 19 states. [2020-10-12 15:40:22,724 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-12 15:40:23,184 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-10-12 15:40:23,812 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-10-12 15:40:24,327 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-12 15:40:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:25,620 INFO L93 Difference]: Finished difference Result 717 states and 923 transitions. [2020-10-12 15:40:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 15:40:25,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:40:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:25,625 INFO L225 Difference]: With dead ends: 717 [2020-10-12 15:40:25,625 INFO L226 Difference]: Without dead ends: 715 [2020-10-12 15:40:25,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:40:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-12 15:40:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 432. [2020-10-12 15:40:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-12 15:40:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 605 transitions. [2020-10-12 15:40:25,740 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 605 transitions. Word has length 47 [2020-10-12 15:40:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:25,740 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 605 transitions. [2020-10-12 15:40:25,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:40:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 605 transitions. [2020-10-12 15:40:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:25,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:25,741 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:25,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:40:25,741 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:25,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1530918940, now seen corresponding path program 15 times [2020-10-12 15:40:25,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:25,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820778453] [2020-10-12 15:40:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:25,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:30,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:30,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:30,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:40:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4896 [2020-10-12 15:40:30,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:40:30,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:30,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:30,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:31,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:31,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:31,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820778453] [2020-10-12 15:40:31,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:31,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:40:31,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921381063] [2020-10-12 15:40:31,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:40:31,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:40:31,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:40:31,412 INFO L87 Difference]: Start difference. First operand 432 states and 605 transitions. Second operand 19 states. [2020-10-12 15:40:33,630 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-12 15:40:33,919 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2020-10-12 15:40:34,084 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-12 15:40:34,375 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-12 15:40:34,551 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-12 15:40:35,058 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-12 15:40:35,319 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-12 15:40:35,745 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-12 15:40:36,011 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-10-12 15:40:36,584 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-12 15:40:36,885 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-12 15:40:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:37,589 INFO L93 Difference]: Finished difference Result 697 states and 897 transitions. [2020-10-12 15:40:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 15:40:37,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:40:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:37,595 INFO L225 Difference]: With dead ends: 697 [2020-10-12 15:40:37,595 INFO L226 Difference]: Without dead ends: 695 [2020-10-12 15:40:37,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 15:40:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-12 15:40:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 397. [2020-10-12 15:40:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 15:40:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 556 transitions. [2020-10-12 15:40:37,693 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 556 transitions. Word has length 47 [2020-10-12 15:40:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:37,693 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 556 transitions. [2020-10-12 15:40:37,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:40:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 556 transitions. [2020-10-12 15:40:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:37,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:37,694 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:37,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:40:37,695 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2136420518, now seen corresponding path program 16 times [2020-10-12 15:40:37,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:37,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873494794] [2020-10-12 15:40:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:37,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:37,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:40:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:43,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:43,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:43,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:40:43,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:43,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873494794] [2020-10-12 15:40:43,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:43,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:40:43,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076097759] [2020-10-12 15:40:43,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:40:43,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:40:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:40:43,415 INFO L87 Difference]: Start difference. First operand 397 states and 556 transitions. Second operand 19 states. [2020-10-12 15:40:45,610 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 15:40:46,034 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-12 15:40:47,407 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 15:40:47,644 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 15:40:48,279 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 15:40:48,471 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-12 15:40:49,319 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 15:40:50,081 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:40:50,664 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 15:40:50,910 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-12 15:40:51,263 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:40:51,584 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:40:51,892 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:40:52,223 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:40:52,767 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:40:53,279 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:40:53,499 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 15:40:53,919 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:40:54,377 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:40:54,552 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-12 15:40:54,869 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:40:55,031 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:40:55,560 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:40:56,335 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-12 15:40:56,601 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 15:40:57,506 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 15:40:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:57,908 INFO L93 Difference]: Finished difference Result 1334 states and 1647 transitions. [2020-10-12 15:40:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-10-12 15:40:57,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:40:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:57,914 INFO L225 Difference]: With dead ends: 1334 [2020-10-12 15:40:57,914 INFO L226 Difference]: Without dead ends: 1332 [2020-10-12 15:40:57,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4566 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1320, Invalid=12252, Unknown=0, NotChecked=0, Total=13572 [2020-10-12 15:40:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2020-10-12 15:40:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 422. [2020-10-12 15:40:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-12 15:40:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 593 transitions. [2020-10-12 15:40:58,027 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 593 transitions. Word has length 47 [2020-10-12 15:40:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:58,027 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 593 transitions. [2020-10-12 15:40:58,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:40:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 593 transitions. [2020-10-12 15:40:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:40:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:58,029 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:58,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:40:58,030 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1621522138, now seen corresponding path program 17 times [2020-10-12 15:40:58,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:58,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217470490] [2020-10-12 15:40:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:59,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:59,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:03,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:03,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:41:03,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:41:03,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:03,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:03,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:03,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217470490] [2020-10-12 15:41:03,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:03,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:41:03,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61453045] [2020-10-12 15:41:03,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:41:03,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:41:03,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:41:03,724 INFO L87 Difference]: Start difference. First operand 422 states and 593 transitions. Second operand 17 states. [2020-10-12 15:41:04,729 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 15:41:04,879 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-12 15:41:05,840 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 15:41:06,576 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-12 15:41:07,410 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-10-12 15:41:08,517 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-12 15:41:09,814 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-10-12 15:41:09,983 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-10-12 15:41:10,549 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-12 15:41:11,765 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-12 15:41:12,058 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-12 15:41:12,316 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-12 15:41:13,671 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-12 15:41:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:15,613 INFO L93 Difference]: Finished difference Result 1614 states and 2073 transitions. [2020-10-12 15:41:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-12 15:41:15,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-12 15:41:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:15,619 INFO L225 Difference]: With dead ends: 1614 [2020-10-12 15:41:15,619 INFO L226 Difference]: Without dead ends: 1612 [2020-10-12 15:41:15,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3755 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1602, Invalid=9528, Unknown=0, NotChecked=0, Total=11130 [2020-10-12 15:41:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-10-12 15:41:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 578. [2020-10-12 15:41:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-12 15:41:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 826 transitions. [2020-10-12 15:41:15,781 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 826 transitions. Word has length 47 [2020-10-12 15:41:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:15,782 INFO L479 AbstractCegarLoop]: Abstraction has 578 states and 826 transitions. [2020-10-12 15:41:15,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:41:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 826 transitions. [2020-10-12 15:41:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:41:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:15,783 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:41:15,783 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2011543128, now seen corresponding path program 18 times [2020-10-12 15:41:15,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:15,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894012184] [2020-10-12 15:41:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:15,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:15,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:20,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:41:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:21,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:21,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:21,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:21,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:21,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894012184] [2020-10-12 15:41:21,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:21,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:21,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124454659] [2020-10-12 15:41:21,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:21,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:21,601 INFO L87 Difference]: Start difference. First operand 578 states and 826 transitions. Second operand 19 states. [2020-10-12 15:41:22,207 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-12 15:41:22,565 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-12 15:41:25,603 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 15:41:25,923 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-12 15:41:26,195 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-12 15:41:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:26,717 INFO L93 Difference]: Finished difference Result 896 states and 1205 transitions. [2020-10-12 15:41:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 15:41:26,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-12 15:41:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:26,724 INFO L225 Difference]: With dead ends: 896 [2020-10-12 15:41:26,724 INFO L226 Difference]: Without dead ends: 894 [2020-10-12 15:41:26,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=373, Invalid=2489, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:41:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-12 15:41:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 578. [2020-10-12 15:41:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-12 15:41:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 826 transitions. [2020-10-12 15:41:26,874 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 826 transitions. Word has length 47 [2020-10-12 15:41:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:26,875 INFO L479 AbstractCegarLoop]: Abstraction has 578 states and 826 transitions. [2020-10-12 15:41:26,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 826 transitions. [2020-10-12 15:41:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:41:26,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:26,876 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:26,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:41:26,877 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash -360196134, now seen corresponding path program 19 times [2020-10-12 15:41:26,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:26,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347898744] [2020-10-12 15:41:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:31,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:41:31,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:32,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:32,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:32,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:32,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:32,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347898744] [2020-10-12 15:41:32,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:32,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:32,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264105255] [2020-10-12 15:41:32,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:32,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:32,405 INFO L87 Difference]: Start difference. First operand 578 states and 826 transitions. Second operand 16 states. [2020-10-12 15:41:34,779 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-12 15:41:35,006 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 15:41:35,264 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-12 15:41:35,504 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-12 15:41:35,771 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-12 15:41:36,007 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:41:36,426 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:41:36,635 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-12 15:41:36,938 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:41:37,151 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-12 15:41:37,664 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:41:37,849 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-12 15:41:38,049 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 15:41:38,223 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 15:41:38,432 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 15:41:38,946 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 15:41:39,229 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 15:41:39,409 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 15:41:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:39,573 INFO L93 Difference]: Finished difference Result 950 states and 1285 transitions. [2020-10-12 15:41:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 15:41:39,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-12 15:41:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:39,578 INFO L225 Difference]: With dead ends: 950 [2020-10-12 15:41:39,578 INFO L226 Difference]: Without dead ends: 948 [2020-10-12 15:41:39,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=668, Invalid=2992, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 15:41:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-10-12 15:41:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 550. [2020-10-12 15:41:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-12 15:41:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 789 transitions. [2020-10-12 15:41:39,761 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 789 transitions. Word has length 47 [2020-10-12 15:41:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:39,761 INFO L479 AbstractCegarLoop]: Abstraction has 550 states and 789 transitions. [2020-10-12 15:41:39,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 789 transitions. [2020-10-12 15:41:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:41:39,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:39,762 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:39,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:41:39,763 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1714711900, now seen corresponding path program 6 times [2020-10-12 15:41:39,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:39,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283250384] [2020-10-12 15:41:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:39,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:40,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:40,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:41:40,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:40,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:40,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283250384] [2020-10-12 15:41:40,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:40,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:41:40,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891933456] [2020-10-12 15:41:40,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:41:40,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:41:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:41:40,540 INFO L87 Difference]: Start difference. First operand 550 states and 789 transitions. Second operand 15 states. [2020-10-12 15:41:41,673 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-12 15:41:42,231 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-12 15:41:42,402 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-12 15:41:42,777 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:41:43,256 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-12 15:41:43,429 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-12 15:41:44,125 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-12 15:41:44,371 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-12 15:41:44,628 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-12 15:41:44,796 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-12 15:41:45,303 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-12 15:41:45,469 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 15:41:45,960 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 15:41:46,372 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-12 15:41:46,526 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-12 15:41:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:46,723 INFO L93 Difference]: Finished difference Result 1304 states and 1720 transitions. [2020-10-12 15:41:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 15:41:46,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-12 15:41:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:46,730 INFO L225 Difference]: With dead ends: 1304 [2020-10-12 15:41:46,730 INFO L226 Difference]: Without dead ends: 1302 [2020-10-12 15:41:46,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:41:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-10-12 15:41:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 907. [2020-10-12 15:41:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 907 states. [2020-10-12 15:41:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1309 transitions. [2020-10-12 15:41:46,996 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1309 transitions. Word has length 49 [2020-10-12 15:41:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:46,997 INFO L479 AbstractCegarLoop]: Abstraction has 907 states and 1309 transitions. [2020-10-12 15:41:46,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:41:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1309 transitions. [2020-10-12 15:41:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:41:46,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:46,998 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:46,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:41:46,998 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1910765020, now seen corresponding path program 4 times [2020-10-12 15:41:46,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:46,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591845303] [2020-10-12 15:41:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:41:48,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:41:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:48,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:48,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591845303] [2020-10-12 15:41:48,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:48,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:41:48,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997734697] [2020-10-12 15:41:48,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:41:48,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:41:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:41:48,820 INFO L87 Difference]: Start difference. First operand 907 states and 1309 transitions. Second operand 17 states. [2020-10-12 15:41:50,919 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-12 15:41:51,111 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-12 15:41:51,523 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 15:41:51,910 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-12 15:41:52,213 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-12 15:41:52,649 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-12 15:41:52,827 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-12 15:41:53,254 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-12 15:41:53,545 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-12 15:41:53,734 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-12 15:41:54,129 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-12 15:41:54,316 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-12 15:41:54,478 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-12 15:41:54,806 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-12 15:41:54,985 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-12 15:41:55,686 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-12 15:41:55,869 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-12 15:41:56,015 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-12 15:41:56,196 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-12 15:41:56,709 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-12 15:41:56,870 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-12 15:41:57,292 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 15:41:57,454 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-12 15:41:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:57,673 INFO L93 Difference]: Finished difference Result 1382 states and 1805 transitions. [2020-10-12 15:41:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 15:41:57,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-12 15:41:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:57,680 INFO L225 Difference]: With dead ends: 1382 [2020-10-12 15:41:57,680 INFO L226 Difference]: Without dead ends: 1380 [2020-10-12 15:41:57,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=823, Invalid=4727, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 15:41:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2020-10-12 15:41:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 925. [2020-10-12 15:41:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-10-12 15:41:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1336 transitions. [2020-10-12 15:41:57,953 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1336 transitions. Word has length 49 [2020-10-12 15:41:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:57,953 INFO L479 AbstractCegarLoop]: Abstraction has 925 states and 1336 transitions. [2020-10-12 15:41:57,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:41:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1336 transitions. [2020-10-12 15:41:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:41:57,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:57,955 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:57,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:41:57,955 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1719421672, now seen corresponding path program 5 times [2020-10-12 15:41:57,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:57,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724942742] [2020-10-12 15:41:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:02,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:02,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:42:02,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:42:02,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:42:02,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:42:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:42:02,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:03,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:03,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:03,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:03,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724942742] [2020-10-12 15:42:03,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:03,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:42:03,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381272744] [2020-10-12 15:42:03,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:42:03,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:42:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:42:03,566 INFO L87 Difference]: Start difference. First operand 925 states and 1336 transitions. Second operand 20 states. [2020-10-12 15:42:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:06,946 INFO L93 Difference]: Finished difference Result 1336 states and 1800 transitions. [2020-10-12 15:42:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:42:06,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-12 15:42:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:06,952 INFO L225 Difference]: With dead ends: 1336 [2020-10-12 15:42:06,952 INFO L226 Difference]: Without dead ends: 1334 [2020-10-12 15:42:06,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:42:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-10-12 15:42:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 985. [2020-10-12 15:42:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-10-12 15:42:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1424 transitions. [2020-10-12 15:42:07,240 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1424 transitions. Word has length 49 [2020-10-12 15:42:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:07,240 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1424 transitions. [2020-10-12 15:42:07,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:42:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1424 transitions. [2020-10-12 15:42:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:42:07,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:07,242 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:07,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:42:07,242 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -529271398, now seen corresponding path program 7 times [2020-10-12 15:42:07,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:07,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620793904] [2020-10-12 15:42:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:07,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:42:07,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:07,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:07,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:07,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:07,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:07,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:07,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:07,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:07,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:07,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620793904] [2020-10-12 15:42:07,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:07,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:42:07,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892061643] [2020-10-12 15:42:07,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:42:07,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:42:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:42:07,705 INFO L87 Difference]: Start difference. First operand 985 states and 1424 transitions. Second operand 13 states. [2020-10-12 15:42:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:10,060 INFO L93 Difference]: Finished difference Result 1372 states and 1879 transitions. [2020-10-12 15:42:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:42:10,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-12 15:42:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:10,068 INFO L225 Difference]: With dead ends: 1372 [2020-10-12 15:42:10,068 INFO L226 Difference]: Without dead ends: 1370 [2020-10-12 15:42:10,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:42:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2020-10-12 15:42:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1116. [2020-10-12 15:42:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-10-12 15:42:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1621 transitions. [2020-10-12 15:42:10,401 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1621 transitions. Word has length 49 [2020-10-12 15:42:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:10,401 INFO L479 AbstractCegarLoop]: Abstraction has 1116 states and 1621 transitions. [2020-10-12 15:42:10,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:42:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1621 transitions. [2020-10-12 15:42:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:42:10,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:10,403 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:10,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:42:10,403 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash -333218278, now seen corresponding path program 6 times [2020-10-12 15:42:10,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:10,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763332451] [2020-10-12 15:42:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:10,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:42:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:11,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:11,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:11,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:11,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763332451] [2020-10-12 15:42:11,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:11,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:42:11,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568832752] [2020-10-12 15:42:11,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:42:11,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:42:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:42:11,239 INFO L87 Difference]: Start difference. First operand 1116 states and 1621 transitions. Second operand 15 states. [2020-10-12 15:42:12,827 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69