/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:03:41,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:03:41,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:03:41,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:03:41,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:03:41,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:03:41,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:03:41,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:03:41,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:03:41,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:03:41,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:03:41,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:03:41,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:03:41,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:03:41,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:03:41,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:03:41,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:03:41,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:03:41,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:03:41,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:03:41,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:03:41,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:03:41,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:03:41,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:03:41,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:03:41,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:03:41,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:03:41,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:03:41,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:03:41,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:03:41,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:03:41,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:03:41,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:03:41,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:03:41,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:03:41,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:03:41,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:03:41,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:03:41,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:03:41,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:03:41,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:03:41,160 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 [2020-10-14 05:03:41,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:03:41,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:03:41,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:03:41,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:03:41,199 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:03:41,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:03:41,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:03:41,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:03:41,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:03:41,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:03:41,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:03:41,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:03:41,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:03:41,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:03:41,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:03:41,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:03:41,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:03:41,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:03:41,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:03:41,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:03:41,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:03:41,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:41,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:03:41,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:03:41,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:03:41,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:03:41,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:03:41,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:03:41,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:03:41,206 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:03:41,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:03:41,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:03:41,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:03:41,543 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:03:41,543 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:03:41,544 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2020-10-14 05:03:41,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1695fa3ab/c10e1603e0f54ba1a3cbbf0797f4f9a1/FLAG28b6a8240 [2020-10-14 05:03:42,022 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:03:42,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-1.i [2020-10-14 05:03:42,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1695fa3ab/c10e1603e0f54ba1a3cbbf0797f4f9a1/FLAG28b6a8240 [2020-10-14 05:03:42,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1695fa3ab/c10e1603e0f54ba1a3cbbf0797f4f9a1 [2020-10-14 05:03:42,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:03:42,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:03:42,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:42,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:03:42,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:03:42,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:42" (1/1) ... [2020-10-14 05:03:42,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265a33a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:42, skipping insertion in model container [2020-10-14 05:03:42,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:42" (1/1) ... [2020-10-14 05:03:42,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:03:42,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:03:42,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:42,914 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:03:42,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:43,021 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:03:43,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43 WrapperNode [2020-10-14 05:03:43,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:43,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:03:43,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:03:43,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:03:43,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:03:43,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:03:43,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:03:43,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:03:43,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (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 [2020-10-14 05:03:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:03:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:03:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:03:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:03:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:03:43,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:03:43,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:03:43,158 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:03:43,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:03:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:03:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:03:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:03:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:03:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:03:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:03:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:03:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:03:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:03:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:03:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:03:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:03:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:03:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:03:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:03:43,163 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:03:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:03:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:03:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:03:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:03:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:03:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:03:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:03:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:03:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:03:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:03:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:03:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:03:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:03:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:03:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:03:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:03:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:03:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:03:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:03:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:03:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:03:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:03:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:03:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:03:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:03:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:03:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:03:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:03:43,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:03:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:03:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:03:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:03:43,522 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:03:43,661 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:03:43,661 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:03:43,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:43 BoogieIcfgContainer [2020-10-14 05:03:43,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:03:43,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:03:43,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:03:43,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:03:43,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:03:42" (1/3) ... [2020-10-14 05:03:43,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91aaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:43, skipping insertion in model container [2020-10-14 05:03:43,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43" (2/3) ... [2020-10-14 05:03:43,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91aaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:43, skipping insertion in model container [2020-10-14 05:03:43,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:43" (3/3) ... [2020-10-14 05:03:43,674 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-10-14 05:03:43,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:03:43,691 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:03:43,704 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:03:43,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:03:43,727 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:03:43,727 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:03:43,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:03:43,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:03:43,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:03:43,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:03:43,728 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:03:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 05:03:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:03:43,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:43,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:43,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-10-14 05:03:43,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:43,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316744139] [2020-10-14 05:03:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:44,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:03:44,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-14 05:03:44,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:03:44,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:03:44,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:03:44,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:44,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316744139] [2020-10-14 05:03:44,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:44,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:03:44,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880180205] [2020-10-14 05:03:44,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:03:44,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:03:44,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:44,305 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-14 05:03:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:44,400 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-14 05:03:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:03:44,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:03:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:44,410 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:03:44,410 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:03:44,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:03:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:03:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:03:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:03:44,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-10-14 05:03:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:44,447 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:03:44,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:03:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:03:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:03:44,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:44,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:44,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:03:44,449 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-10-14 05:03:44,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:44,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139743228] [2020-10-14 05:03:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:03:44,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-14 05:03:44,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:44,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:03:44,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:03:44,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139743228] [2020-10-14 05:03:44,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:44,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:44,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99429828] [2020-10-14 05:03:44,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:44,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:44,629 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-14 05:03:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:44,754 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-14 05:03:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:44,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:03:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:44,758 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:03:44,758 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:03:44,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:03:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:03:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-14 05:03:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:03:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 05:03:44,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-10-14 05:03:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:44,768 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 05:03:44,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 05:03:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:03:44,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:44,770 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:44,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:03:44,770 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-10-14 05:03:44,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:44,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16153143] [2020-10-14 05:03:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:03:44,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:03:44,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:03:44,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:44,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:44,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16153143] [2020-10-14 05:03:44,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:44,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:44,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292736732] [2020-10-14 05:03:44,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:44,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:44,908 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-10-14 05:03:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,059 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 05:03:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:45,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:03:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,061 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:03:45,061 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:03:45,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:03:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:03:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-14 05:03:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:03:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-14 05:03:45,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-14 05:03:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,073 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-14 05:03:45,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-14 05:03:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:03:45,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,074 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:45,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:03:45,075 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-10-14 05:03:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875680824] [2020-10-14 05:03:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:03:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-14 05:03:45,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:03:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:45,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:45,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875680824] [2020-10-14 05:03:45,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:45,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388131596] [2020-10-14 05:03:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:45,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:45,246 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-14 05:03:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,351 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 05:03:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:45,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:03:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,352 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:03:45,352 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:03:45,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:03:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:03:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-14 05:03:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:03:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:03:45,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-10-14 05:03:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,359 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:03:45,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:03:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:03:45,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,360 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:45,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:03:45,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-10-14 05:03:45,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551247169] [2020-10-14 05:03:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:03:45,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-14 05:03:45,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:03:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:45,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:03:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551247169] [2020-10-14 05:03:45,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:45,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:03:45,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452684575] [2020-10-14 05:03:45,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:03:45,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:03:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:03:45,781 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-10-14 05:03:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:46,048 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-14 05:03:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:03:46,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:03:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:46,051 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:03:46,051 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:03:46,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:03:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-14 05:03:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:03:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 05:03:46,059 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-10-14 05:03:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:46,060 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 05:03:46,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:03:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 05:03:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:03:46,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:46,061 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:46,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:03:46,061 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-10-14 05:03:46,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:46,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062411908] [2020-10-14 05:03:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:03:46,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-14 05:03:46,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:46,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:46,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:46,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:46,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:03:46,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:46,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062411908] [2020-10-14 05:03:46,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:46,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:46,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233115446] [2020-10-14 05:03:46,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:46,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:46,498 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2020-10-14 05:03:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:46,734 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-14 05:03:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:03:46,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:03:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:46,736 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:03:46,736 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:03:46,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:03:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-14 05:03:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:03:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-14 05:03:46,742 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2020-10-14 05:03:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:46,743 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-14 05:03:46,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-14 05:03:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:03:46,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:46,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:46,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:03:46,744 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1587413318, now seen corresponding path program 1 times [2020-10-14 05:03:46,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:46,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069008030] [2020-10-14 05:03:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:03:46,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 05:03:46,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:46,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:46,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:46,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:46,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069008030] [2020-10-14 05:03:46,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:46,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:46,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92258787] [2020-10-14 05:03:46,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:46,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:46,998 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-10-14 05:03:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:47,240 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-14 05:03:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:47,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 05:03:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:47,242 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:03:47,242 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 05:03:47,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 05:03:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-10-14 05:03:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:03:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-14 05:03:47,249 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2020-10-14 05:03:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:47,249 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-14 05:03:47,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-14 05:03:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:47,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:47,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:47,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:03:47,251 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash -742131883, now seen corresponding path program 2 times [2020-10-14 05:03:47,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:47,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373349314] [2020-10-14 05:03:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:47,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:47,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 05:03:47,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:47,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:47,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:47,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:47,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:47,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:47,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:47,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:47,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:47,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373349314] [2020-10-14 05:03:47,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:47,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:47,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678769685] [2020-10-14 05:03:47,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:47,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:47,501 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 10 states. [2020-10-14 05:03:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:47,802 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-14 05:03:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:47,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:03:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:47,806 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:03:47,806 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:03:47,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:03:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-14 05:03:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:03:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-14 05:03:47,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-10-14 05:03:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:47,825 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-14 05:03:47,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-14 05:03:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:47,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:47,827 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:47,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:03:47,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 1 times [2020-10-14 05:03:47,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:47,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240435063] [2020-10-14 05:03:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:48,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:48,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:48,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:48,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:48,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240435063] [2020-10-14 05:03:48,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:48,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:48,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532336755] [2020-10-14 05:03:48,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:48,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:48,245 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-10-14 05:03:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:48,477 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 05:03:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:48,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:03:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:48,479 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:03:48,479 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:03:48,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:03:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-14 05:03:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:03:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:03:48,484 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-10-14 05:03:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:48,484 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:03:48,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:03:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:48,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:48,486 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:48,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:03:48,486 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-10-14 05:03:48,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:48,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989319913] [2020-10-14 05:03:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:48,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-14 05:03:48,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:03:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:48,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:48,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:48,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:48,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:48,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989319913] [2020-10-14 05:03:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:48,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:03:48,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237843198] [2020-10-14 05:03:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:03:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:03:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:03:48,770 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 11 states. [2020-10-14 05:03:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:49,010 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 05:03:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:49,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:03:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:49,012 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:03:49,012 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:03:49,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:03:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-14 05:03:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:03:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-14 05:03:49,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-10-14 05:03:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:49,018 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-14 05:03:49,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:03:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-14 05:03:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:49,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:49,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:49,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:03:49,020 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-10-14 05:03:49,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:49,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15841488] [2020-10-14 05:03:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:49,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:49,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:49,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-14 05:03:49,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:49,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:03:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:49,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:49,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:49,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:49,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:49,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:49,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15841488] [2020-10-14 05:03:49,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:49,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:03:49,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778943625] [2020-10-14 05:03:49,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:03:49,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:03:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:03:49,300 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 11 states. [2020-10-14 05:03:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:49,539 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 05:03:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:03:49,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:03:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:49,540 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:03:49,540 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:03:49,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:03:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:03:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 05:03:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:03:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-14 05:03:49,546 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-10-14 05:03:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:49,546 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-14 05:03:49,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:03:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-14 05:03:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:03:49,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:49,548 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, 1, 1, 1] [2020-10-14 05:03:49,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:03:49,548 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 3 times [2020-10-14 05:03:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:49,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940080114] [2020-10-14 05:03:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:49,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:03:49,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 05:03:49,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:49,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:03:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:03:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:49,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:49,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:49,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:49,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:49,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940080114] [2020-10-14 05:03:49,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:03:49,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645845567] [2020-10-14 05:03:49,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:03:49,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:03:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:03:49,993 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2020-10-14 05:03:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:50,376 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-14 05:03:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:03:50,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:03:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:50,377 INFO L225 Difference]: With dead ends: 80 [2020-10-14 05:03:50,378 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:03:50,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:03:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2020-10-14 05:03:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:03:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-14 05:03:50,389 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2020-10-14 05:03:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:50,390 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-14 05:03:50,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:03:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-14 05:03:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:03:50,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:50,394 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, 1, 1, 1] [2020-10-14 05:03:50,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:03:50,395 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 256692321, now seen corresponding path program 1 times [2020-10-14 05:03:50,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:50,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161070747] [2020-10-14 05:03:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:03:50,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:50,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:50,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:50,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161070747] [2020-10-14 05:03:50,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:50,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:03:50,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023330930] [2020-10-14 05:03:50,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:03:50,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:03:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:03:50,741 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-10-14 05:03:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,116 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-14 05:03:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:03:51,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:03:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:51,117 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:03:51,118 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:03:51,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:03:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-14 05:03:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:03:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-14 05:03:51,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 30 [2020-10-14 05:03:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:51,124 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-14 05:03:51,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:03:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-14 05:03:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:03:51,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:51,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:51,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:03:51,126 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -43846724, now seen corresponding path program 4 times [2020-10-14 05:03:51,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:51,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565143700] [2020-10-14 05:03:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:03:51,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-14 05:03:51,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:03:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:51,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:03:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:51,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:51,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:51,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:51,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565143700] [2020-10-14 05:03:51,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:51,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:51,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684519330] [2020-10-14 05:03:51,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:51,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:51,571 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 13 states. [2020-10-14 05:03:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,999 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-14 05:03:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:52,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:03:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:52,002 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:03:52,002 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:03:52,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:03:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2020-10-14 05:03:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:03:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-10-14 05:03:52,018 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 32 [2020-10-14 05:03:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:52,018 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-10-14 05:03:52,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-10-14 05:03:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:03:52,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:52,021 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:52,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:03:52,022 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash 861647831, now seen corresponding path program 5 times [2020-10-14 05:03:52,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:52,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150755707] [2020-10-14 05:03:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:52,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:03:52,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 05:03:52,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:03:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:03:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:52,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:52,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150755707] [2020-10-14 05:03:52,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:52,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:52,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806729131] [2020-10-14 05:03:52,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:52,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:52,624 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 13 states. [2020-10-14 05:03:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:53,255 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-14 05:03:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:53,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 05:03:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:53,257 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:03:53,257 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:03:53,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:03:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:03:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-14 05:03:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:03:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-14 05:03:53,266 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 34 [2020-10-14 05:03:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:53,267 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-14 05:03:53,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-14 05:03:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:03:53,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:53,268 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:53,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:03:53,268 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1881366999, now seen corresponding path program 2 times [2020-10-14 05:03:53,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:53,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165349045] [2020-10-14 05:03:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:53,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:03:54,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:03:54,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-10-14 05:03:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:54,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:54,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:54,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:54,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:54,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:54,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:54,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:54,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:54,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165349045] [2020-10-14 05:03:54,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:54,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:54,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656375433] [2020-10-14 05:03:54,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:54,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:54,847 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 13 states. [2020-10-14 05:03:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:55,318 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-14 05:03:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:55,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 05:03:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:55,319 INFO L225 Difference]: With dead ends: 83 [2020-10-14 05:03:55,319 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:03:55,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:03:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-10-14 05:03:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:03:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-14 05:03:55,324 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 34 [2020-10-14 05:03:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:55,324 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-14 05:03:55,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-14 05:03:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:03:55,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:55,325 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:55,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:03:55,325 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash -781949048, now seen corresponding path program 6 times [2020-10-14 05:03:55,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:55,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232498888] [2020-10-14 05:03:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:55,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:55,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:03:55,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 05:03:55,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:55,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:03:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:03:55,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:55,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:55,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:55,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:55,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:55,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:55,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:55,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:55,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232498888] [2020-10-14 05:03:55,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:55,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:03:55,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158109680] [2020-10-14 05:03:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:03:55,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:03:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:03:55,874 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 14 states. [2020-10-14 05:03:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:56,380 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-10-14 05:03:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:03:56,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 05:03:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:56,381 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:03:56,382 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:03:56,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:03:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:03:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-14 05:03:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:03:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-14 05:03:56,388 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 34 [2020-10-14 05:03:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:56,388 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-14 05:03:56,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:03:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-14 05:03:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:03:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:56,389 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:56,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:03:56,390 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash 189501192, now seen corresponding path program 1 times [2020-10-14 05:03:56,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:56,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7359287] [2020-10-14 05:03:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:56,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:56,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:56,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:03:56,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:56,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-14 05:03:56,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:56,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:03:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:03:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:56,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:56,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:56,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:56,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:56,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:56,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:56,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7359287] [2020-10-14 05:03:56,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:56,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:03:56,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59556005] [2020-10-14 05:03:56,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:03:56,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:03:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:03:56,973 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 14 states. [2020-10-14 05:03:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:57,461 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-14 05:03:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:03:57,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 05:03:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:57,462 INFO L225 Difference]: With dead ends: 83 [2020-10-14 05:03:57,462 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:03:57,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:03:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:03:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 05:03:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:03:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-14 05:03:57,467 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 34 [2020-10-14 05:03:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:57,467 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-14 05:03:57,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:03:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-14 05:03:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:03:57,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:57,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:57,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:03:57,469 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash 214918307, now seen corresponding path program 7 times [2020-10-14 05:03:57,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:57,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997891130] [2020-10-14 05:03:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:57,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:57,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:57,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:03:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:03:57,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:58,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:58,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:58,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:58,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:58,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:58,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997891130] [2020-10-14 05:03:58,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:58,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:03:58,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233879041] [2020-10-14 05:03:58,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:03:58,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:03:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:58,216 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 15 states. [2020-10-14 05:03:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:59,058 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-14 05:03:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:03:59,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 05:03:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:59,060 INFO L225 Difference]: With dead ends: 122 [2020-10-14 05:03:59,060 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:03:59,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:03:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:03:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2020-10-14 05:03:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:03:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-14 05:03:59,067 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 36 [2020-10-14 05:03:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:59,067 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-14 05:03:59,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:03:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-14 05:03:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:03:59,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:59,068 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:59,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:03:59,069 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1199866653, now seen corresponding path program 2 times [2020-10-14 05:03:59,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:59,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665019088] [2020-10-14 05:03:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:03:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:59,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:03:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:59,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:59,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:59,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665019088] [2020-10-14 05:03:59,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:59,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:03:59,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109717349] [2020-10-14 05:03:59,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:03:59,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:03:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:59,735 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 15 states. [2020-10-14 05:04:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:00,610 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2020-10-14 05:04:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:04:00,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 05:04:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:00,611 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:04:00,611 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:04:00,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:04:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:04:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-10-14 05:04:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:04:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-14 05:04:00,619 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 36 [2020-10-14 05:04:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:00,619 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-14 05:04:00,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:04:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-14 05:04:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:04:00,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:00,620 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:00,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:04:00,620 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash 426739454, now seen corresponding path program 8 times [2020-10-14 05:04:00,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:00,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129873847] [2020-10-14 05:04:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:00,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:04:00,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:01,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:01,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:01,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:01,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:01,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:01,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:01,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:01,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129873847] [2020-10-14 05:04:01,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:01,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:01,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022484490] [2020-10-14 05:04:01,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:01,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:01,468 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 16 states. [2020-10-14 05:04:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:02,410 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-14 05:04:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:02,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 05:04:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:02,415 INFO L225 Difference]: With dead ends: 139 [2020-10-14 05:04:02,415 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 05:04:02,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:04:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 05:04:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-14 05:04:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:04:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-10-14 05:04:02,424 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 38 [2020-10-14 05:04:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:02,425 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-10-14 05:04:02,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-10-14 05:04:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:04:02,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:02,426 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:02,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:04:02,426 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2123398809, now seen corresponding path program 9 times [2020-10-14 05:04:02,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:02,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729348385] [2020-10-14 05:04:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:02,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:02,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:04:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:03,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:03,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729348385] [2020-10-14 05:04:03,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:03,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:03,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882579377] [2020-10-14 05:04:03,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:03,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:03,174 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 16 states. [2020-10-14 05:04:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:04,061 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-14 05:04:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:04,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 05:04:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:04,065 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:04:04,065 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:04:04,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:04:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:04:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2020-10-14 05:04:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:04:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-14 05:04:04,073 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 40 [2020-10-14 05:04:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:04,073 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-14 05:04:04,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-14 05:04:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:04:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:04,074 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:04,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:04:04,075 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -449288551, now seen corresponding path program 3 times [2020-10-14 05:04:04,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:04,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941097848] [2020-10-14 05:04:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:04:06,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:04:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-10-14 05:04:06,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:06,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:06,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:04:06,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:04:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:06,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941097848] [2020-10-14 05:04:06,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:06,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:06,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337402148] [2020-10-14 05:04:06,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:06,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:06,657 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 16 states. [2020-10-14 05:04:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:07,289 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2020-10-14 05:04:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:07,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 05:04:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:07,293 INFO L225 Difference]: With dead ends: 118 [2020-10-14 05:04:07,293 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:04:07,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:04:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-14 05:04:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:04:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-14 05:04:07,305 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 40 [2020-10-14 05:04:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:07,305 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-14 05:04:07,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-14 05:04:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:04:07,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:07,306 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:07,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:04:07,306 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204278, now seen corresponding path program 10 times [2020-10-14 05:04:07,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:07,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350828957] [2020-10-14 05:04:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:04:07,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:04:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:08,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:08,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:08,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:08,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:08,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:08,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350828957] [2020-10-14 05:04:08,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:08,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:04:08,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677963564] [2020-10-14 05:04:08,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:04:08,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:04:08,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:04:08,347 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 17 states. [2020-10-14 05:04:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:09,502 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2020-10-14 05:04:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:04:09,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 05:04:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:09,504 INFO L225 Difference]: With dead ends: 138 [2020-10-14 05:04:09,504 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:04:09,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:04:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 118. [2020-10-14 05:04:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 05:04:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2020-10-14 05:04:09,513 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 40 [2020-10-14 05:04:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:09,513 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2020-10-14 05:04:09,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:04:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2020-10-14 05:04:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:04:09,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:09,514 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:09,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:04:09,514 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1438973366, now seen corresponding path program 2 times [2020-10-14 05:04:09,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:09,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463489781] [2020-10-14 05:04:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:04:09,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:09,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-14 05:04:09,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:04:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:04:09,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:10,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:10,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:10,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:10,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463489781] [2020-10-14 05:04:10,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:10,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:04:10,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488003101] [2020-10-14 05:04:10,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:04:10,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:10,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:04:10,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:04:10,565 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand 17 states. [2020-10-14 05:04:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:11,475 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-14 05:04:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:04:11,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 05:04:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:11,477 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:04:11,477 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 05:04:11,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:04:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 05:04:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2020-10-14 05:04:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:04:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2020-10-14 05:04:11,487 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 40 [2020-10-14 05:04:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:11,488 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2020-10-14 05:04:11,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:04:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2020-10-14 05:04:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:04:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:11,489 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:11,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:04:11,489 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1569156773, now seen corresponding path program 11 times [2020-10-14 05:04:11,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:11,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602386513] [2020-10-14 05:04:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:04:11,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:04:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:12,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:12,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:12,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602386513] [2020-10-14 05:04:12,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:12,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:12,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118282036] [2020-10-14 05:04:12,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:12,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:12,582 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand 18 states. [2020-10-14 05:04:13,200 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 05:04:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:13,727 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2020-10-14 05:04:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:13,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 05:04:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:13,729 INFO L225 Difference]: With dead ends: 166 [2020-10-14 05:04:13,729 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 05:04:13,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 05:04:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2020-10-14 05:04:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 05:04:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2020-10-14 05:04:13,740 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 42 [2020-10-14 05:04:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:13,740 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2020-10-14 05:04:13,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2020-10-14 05:04:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:04:13,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:13,741 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:13,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:04:13,742 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1450211237, now seen corresponding path program 3 times [2020-10-14 05:04:13,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:13,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108547627] [2020-10-14 05:04:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:04:14,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:04:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:14,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:14,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:14,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108547627] [2020-10-14 05:04:14,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:14,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:14,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009608219] [2020-10-14 05:04:14,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:14,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:14,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:14,908 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand 18 states. [2020-10-14 05:04:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:16,285 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-10-14 05:04:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:16,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 05:04:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:16,287 INFO L225 Difference]: With dead ends: 173 [2020-10-14 05:04:16,287 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 05:04:16,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:04:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 05:04:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2020-10-14 05:04:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:04:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2020-10-14 05:04:16,299 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 42 [2020-10-14 05:04:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:16,300 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2020-10-14 05:04:16,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2020-10-14 05:04:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:04:16,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:16,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:16,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:04:16,305 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 474814592, now seen corresponding path program 12 times [2020-10-14 05:04:16,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:16,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281224724] [2020-10-14 05:04:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:16,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:16,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:16,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:04:16,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:16,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-14 05:04:16,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:16,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:16,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:16,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:16,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:04:16,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:17,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:17,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:17,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:17,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281224724] [2020-10-14 05:04:17,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:17,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:17,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551006598] [2020-10-14 05:04:17,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:17,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:17,621 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand 19 states. [2020-10-14 05:04:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:19,002 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2020-10-14 05:04:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:19,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 05:04:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:19,004 INFO L225 Difference]: With dead ends: 185 [2020-10-14 05:04:19,005 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 05:04:19,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 05:04:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 159. [2020-10-14 05:04:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 05:04:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-10-14 05:04:19,021 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 44 [2020-10-14 05:04:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:19,021 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-10-14 05:04:19,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-10-14 05:04:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:04:19,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:19,022 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:19,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:04:19,023 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1526178801, now seen corresponding path program 13 times [2020-10-14 05:04:19,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:19,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359342000] [2020-10-14 05:04:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:19,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:19,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:04:19,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:04:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:20,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:20,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:20,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:20,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:20,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:20,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:20,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:20,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359342000] [2020-10-14 05:04:20,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:20,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:20,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493234056] [2020-10-14 05:04:20,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:20,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:20,241 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 18 states. [2020-10-14 05:04:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:21,075 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2020-10-14 05:04:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:04:21,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 05:04:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:21,077 INFO L225 Difference]: With dead ends: 181 [2020-10-14 05:04:21,078 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 05:04:21,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 05:04:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2020-10-14 05:04:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 05:04:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-10-14 05:04:21,090 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 44 [2020-10-14 05:04:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:21,091 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-10-14 05:04:21,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-10-14 05:04:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:21,092 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:21,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:04:21,092 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1078966171, now seen corresponding path program 14 times [2020-10-14 05:04:21,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:21,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078126983] [2020-10-14 05:04:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:21,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:21,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:04:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:22,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:22,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:22,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:22,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:22,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078126983] [2020-10-14 05:04:22,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:22,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:22,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266917799] [2020-10-14 05:04:22,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:22,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:22,491 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 19 states. [2020-10-14 05:04:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:23,794 INFO L93 Difference]: Finished difference Result 193 states and 217 transitions. [2020-10-14 05:04:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:23,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 05:04:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:23,796 INFO L225 Difference]: With dead ends: 193 [2020-10-14 05:04:23,796 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 05:04:23,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 05:04:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-14 05:04:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:04:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-10-14 05:04:23,807 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 46 [2020-10-14 05:04:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:23,807 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-10-14 05:04:23,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-10-14 05:04:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:23,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:23,808 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:23,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:04:23,808 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -642688613, now seen corresponding path program 4 times [2020-10-14 05:04:23,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:23,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104611268] [2020-10-14 05:04:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:23,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:23,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:27,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:27,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:27,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:04:27,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3648 [2020-10-14 05:04:27,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:27,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:27,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:27,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:27,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:04:27,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:28,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:28,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:28,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:28,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:28,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:28,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:28,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:28,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104611268] [2020-10-14 05:04:28,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:28,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:28,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950883237] [2020-10-14 05:04:28,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:28,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:28,338 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 19 states. [2020-10-14 05:04:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:29,645 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2020-10-14 05:04:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:29,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 05:04:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:29,649 INFO L225 Difference]: With dead ends: 159 [2020-10-14 05:04:29,649 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:04:29,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:04:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2020-10-14 05:04:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:04:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2020-10-14 05:04:29,657 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 46 [2020-10-14 05:04:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:29,658 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2020-10-14 05:04:29,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2020-10-14 05:04:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:29,659 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:29,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:04:29,660 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2122656460, now seen corresponding path program 15 times [2020-10-14 05:04:29,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:29,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644556370] [2020-10-14 05:04:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:30,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:04:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:04:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:30,622 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 05:04:30,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:30,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:30,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:30,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:30,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:31,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644556370] [2020-10-14 05:04:31,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:31,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:04:31,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698719027] [2020-10-14 05:04:31,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:04:31,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:04:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:04:31,014 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand 20 states. [2020-10-14 05:04:32,125 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-14 05:04:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:32,534 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-10-14 05:04:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:32,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 05:04:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:32,536 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:04:32,536 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 05:04:32,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:04:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 05:04:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-14 05:04:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:04:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-10-14 05:04:32,546 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 46 [2020-10-14 05:04:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:32,546 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-10-14 05:04:32,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:04:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-10-14 05:04:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:32,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:32,547 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:32,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:04:32,548 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2125941812, now seen corresponding path program 3 times [2020-10-14 05:04:32,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:32,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887957404] [2020-10-14 05:04:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:04:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:33,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:33,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:33,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887957404] [2020-10-14 05:04:33,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:33,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:04:33,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905602354] [2020-10-14 05:04:33,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:04:33,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:04:33,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:04:33,875 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 20 states. [2020-10-14 05:04:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:35,533 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2020-10-14 05:04:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:35,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 05:04:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:35,535 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:04:35,535 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:04:35,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:04:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:04:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-14 05:04:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:04:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 165 transitions. [2020-10-14 05:04:35,546 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 165 transitions. Word has length 46 [2020-10-14 05:04:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:35,546 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 165 transitions. [2020-10-14 05:04:35,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:04:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 165 transitions. [2020-10-14 05:04:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:04:35,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:35,547 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:35,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:04:35,548 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash -187930905, now seen corresponding path program 16 times [2020-10-14 05:04:35,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:35,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284572051] [2020-10-14 05:04:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:35,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:36,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:36,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:04:36,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:36,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-14 05:04:36,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:36,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:04:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:37,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:37,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:37,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284572051] [2020-10-14 05:04:37,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:37,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:37,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269720852] [2020-10-14 05:04:37,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:37,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:37,179 INFO L87 Difference]: Start difference. First operand 149 states and 165 transitions. Second operand 21 states. [2020-10-14 05:04:37,723 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-14 05:04:38,612 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-14 05:04:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:39,289 INFO L93 Difference]: Finished difference Result 230 states and 256 transitions. [2020-10-14 05:04:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:04:39,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 05:04:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:39,292 INFO L225 Difference]: With dead ends: 230 [2020-10-14 05:04:39,292 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 05:04:39,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:04:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 05:04:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 186. [2020-10-14 05:04:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-14 05:04:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2020-10-14 05:04:39,306 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 48 [2020-10-14 05:04:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2020-10-14 05:04:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2020-10-14 05:04:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:04:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:39,307 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:39,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:04:39,307 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1378279257, now seen corresponding path program 4 times [2020-10-14 05:04:39,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:39,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715406427] [2020-10-14 05:04:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:39,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:04:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-14 05:04:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:39,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:04:39,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:40,225 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 05:04:40,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:40,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:40,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:40,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:40,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:40,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715406427] [2020-10-14 05:04:40,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:40,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:40,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498902276] [2020-10-14 05:04:40,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:40,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:40,873 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand 21 states. [2020-10-14 05:04:42,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-14 05:04:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:42,824 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-14 05:04:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:04:42,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 05:04:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:42,826 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:04:42,826 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 05:04:42,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:04:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 05:04:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2020-10-14 05:04:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-14 05:04:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 219 transitions. [2020-10-14 05:04:42,843 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 219 transitions. Word has length 48 [2020-10-14 05:04:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:42,843 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 219 transitions. [2020-10-14 05:04:42,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 219 transitions. [2020-10-14 05:04:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:04:42,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:42,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:42,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:04:42,844 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -164296638, now seen corresponding path program 17 times [2020-10-14 05:04:42,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:42,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475635950] [2020-10-14 05:04:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:43,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:43,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:04:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:43,886 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 05:04:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:44,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:44,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:44,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:44,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:44,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:44,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:44,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:44,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475635950] [2020-10-14 05:04:44,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:44,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:44,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626367548] [2020-10-14 05:04:44,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:44,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:44,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:44,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:44,426 INFO L87 Difference]: Start difference. First operand 195 states and 219 transitions. Second operand 22 states. [2020-10-14 05:04:45,142 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-14 05:04:45,540 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-14 05:04:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:46,485 INFO L93 Difference]: Finished difference Result 251 states and 280 transitions. [2020-10-14 05:04:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:46,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 05:04:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:46,487 INFO L225 Difference]: With dead ends: 251 [2020-10-14 05:04:46,487 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 05:04:46,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:04:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 05:04:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 207. [2020-10-14 05:04:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 05:04:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 232 transitions. [2020-10-14 05:04:46,506 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 232 transitions. Word has length 50 [2020-10-14 05:04:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:46,507 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 232 transitions. [2020-10-14 05:04:46,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 232 transitions. [2020-10-14 05:04:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:04:46,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:46,508 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:46,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:04:46,508 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1073397469, now seen corresponding path program 18 times [2020-10-14 05:04:46,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:46,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170622643] [2020-10-14 05:04:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:47,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:47,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:04:47,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:04:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:47,735 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-14 05:04:48,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:48,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:48,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:48,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:48,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170622643] [2020-10-14 05:04:48,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:48,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:48,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232604321] [2020-10-14 05:04:48,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:48,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:48,319 INFO L87 Difference]: Start difference. First operand 207 states and 232 transitions. Second operand 22 states. [2020-10-14 05:04:48,974 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-14 05:04:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:49,816 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2020-10-14 05:04:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:49,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 05:04:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:49,818 INFO L225 Difference]: With dead ends: 253 [2020-10-14 05:04:49,819 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 05:04:49,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 05:04:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 178. [2020-10-14 05:04:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 05:04:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 200 transitions. [2020-10-14 05:04:49,834 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 200 transitions. Word has length 52 [2020-10-14 05:04:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:49,834 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 200 transitions. [2020-10-14 05:04:49,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 200 transitions. [2020-10-14 05:04:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:04:49,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:49,835 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:49,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:04:49,836 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1150261981, now seen corresponding path program 5 times [2020-10-14 05:04:49,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:49,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367590248] [2020-10-14 05:04:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:49,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:51,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:04:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:55,438 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-14 05:04:56,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:56,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:56,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:56,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:56,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:56,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:56,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:56,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:56,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:56,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367590248] [2020-10-14 05:04:56,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:56,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:56,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560033357] [2020-10-14 05:04:56,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:56,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:56,052 INFO L87 Difference]: Start difference. First operand 178 states and 200 transitions. Second operand 22 states. [2020-10-14 05:04:56,997 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 05:04:57,410 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-14 05:04:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:58,203 INFO L93 Difference]: Finished difference Result 206 states and 229 transitions. [2020-10-14 05:04:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:58,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 05:04:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:58,205 INFO L225 Difference]: With dead ends: 206 [2020-10-14 05:04:58,205 INFO L226 Difference]: Without dead ends: 185 [2020-10-14 05:04:58,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:04:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-14 05:04:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2020-10-14 05:04:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 05:04:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2020-10-14 05:04:58,216 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 52 [2020-10-14 05:04:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:58,216 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2020-10-14 05:04:58,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2020-10-14 05:04:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:04:58,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:58,217 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:58,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:04:58,217 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -962582066, now seen corresponding path program 19 times [2020-10-14 05:04:58,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:58,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289115175] [2020-10-14 05:04:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:58,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:58,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:58,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:04:58,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:04:58,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:59,340 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-14 05:04:59,621 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-14 05:05:00,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:00,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:00,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289115175] [2020-10-14 05:05:00,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:00,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:05:00,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194897807] [2020-10-14 05:05:00,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:05:00,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:05:00,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:05:00,249 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand 23 states. [2020-10-14 05:05:01,240 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-14 05:05:01,476 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2020-10-14 05:05:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:02,155 INFO L93 Difference]: Finished difference Result 254 states and 281 transitions. [2020-10-14 05:05:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:05:02,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 05:05:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:02,157 INFO L225 Difference]: With dead ends: 254 [2020-10-14 05:05:02,157 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 05:05:02,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:05:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 05:05:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 212. [2020-10-14 05:05:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 05:05:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 235 transitions. [2020-10-14 05:05:02,172 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 235 transitions. Word has length 52 [2020-10-14 05:05:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:02,172 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 235 transitions. [2020-10-14 05:05:02,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:05:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 235 transitions. [2020-10-14 05:05:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:05:02,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:02,173 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:02,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:05:02,174 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 963511182, now seen corresponding path program 4 times [2020-10-14 05:05:02,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:02,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322314295] [2020-10-14 05:05:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:02,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:05:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:03,411 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-14 05:05:03,700 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-14 05:05:03,957 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 05:05:04,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:04,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322314295] [2020-10-14 05:05:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:04,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:05:04,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956942018] [2020-10-14 05:05:04,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:05:04,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:05:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:05:04,419 INFO L87 Difference]: Start difference. First operand 212 states and 235 transitions. Second operand 23 states. [2020-10-14 05:05:06,032 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-14 05:05:06,450 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-10-14 05:05:06,694 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-14 05:05:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:07,340 INFO L93 Difference]: Finished difference Result 251 states and 278 transitions. [2020-10-14 05:05:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:05:07,341 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 05:05:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:07,343 INFO L225 Difference]: With dead ends: 251 [2020-10-14 05:05:07,343 INFO L226 Difference]: Without dead ends: 245 [2020-10-14 05:05:07,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:05:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-14 05:05:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 223. [2020-10-14 05:05:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 05:05:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 248 transitions. [2020-10-14 05:05:07,362 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 248 transitions. Word has length 52 [2020-10-14 05:05:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:07,363 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 248 transitions. [2020-10-14 05:05:07,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:05:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 248 transitions. [2020-10-14 05:05:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:05:07,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:07,364 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:07,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:05:07,364 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1574720151, now seen corresponding path program 20 times [2020-10-14 05:05:07,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:07,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008870506] [2020-10-14 05:05:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:08,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:08,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:05:08,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:05:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:08,724 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 05:05:08,929 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 05:05:09,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:09,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:09,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:09,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:09,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:05:09,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:09,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:09,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008870506] [2020-10-14 05:05:09,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:09,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:05:09,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899726643] [2020-10-14 05:05:09,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:05:09,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:05:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:05:09,537 INFO L87 Difference]: Start difference. First operand 223 states and 248 transitions. Second operand 24 states. [2020-10-14 05:05:10,776 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-14 05:05:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:11,656 INFO L93 Difference]: Finished difference Result 284 states and 315 transitions. [2020-10-14 05:05:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:05:11,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 05:05:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:11,658 INFO L225 Difference]: With dead ends: 284 [2020-10-14 05:05:11,658 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 05:05:11,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:05:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 05:05:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 240. [2020-10-14 05:05:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-14 05:05:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2020-10-14 05:05:11,679 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 54 [2020-10-14 05:05:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:11,679 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2020-10-14 05:05:11,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:05:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2020-10-14 05:05:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:05:11,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:11,680 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:11,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:05:11,680 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1009330199, now seen corresponding path program 5 times [2020-10-14 05:05:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:11,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080337773] [2020-10-14 05:05:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:12,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:12,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:05:12,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-14 05:05:12,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:12,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:05:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:05:12,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:13,151 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-14 05:05:13,408 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-14 05:05:14,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:14,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:14,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:14,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080337773] [2020-10-14 05:05:14,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:14,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:05:14,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861626409] [2020-10-14 05:05:14,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:05:14,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:14,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:05:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:05:14,064 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand 24 states. [2020-10-14 05:05:15,192 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 05:05:15,695 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 05:05:15,887 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:05:16,302 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-14 05:05:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:17,217 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2020-10-14 05:05:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:05:17,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 05:05:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:17,220 INFO L225 Difference]: With dead ends: 270 [2020-10-14 05:05:17,220 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 05:05:17,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:05:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 05:05:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 242. [2020-10-14 05:05:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-14 05:05:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2020-10-14 05:05:17,245 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 54 [2020-10-14 05:05:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:17,246 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2020-10-14 05:05:17,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:05:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2020-10-14 05:05:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:05:17,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:17,247 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:17,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:05:17,247 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1428900284, now seen corresponding path program 21 times [2020-10-14 05:05:17,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:17,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783503115] [2020-10-14 05:05:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:17,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:05:18,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:18,917 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 05:05:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:19,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:19,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783503115] [2020-10-14 05:05:19,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:19,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:19,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986833870] [2020-10-14 05:05:19,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:19,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:19,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:19,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:19,717 INFO L87 Difference]: Start difference. First operand 242 states and 269 transitions. Second operand 25 states. [2020-10-14 05:05:20,361 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-14 05:05:20,706 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-14 05:05:21,061 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-14 05:05:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:22,309 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2020-10-14 05:05:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:22,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:05:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:22,311 INFO L225 Difference]: With dead ends: 298 [2020-10-14 05:05:22,311 INFO L226 Difference]: Without dead ends: 294 [2020-10-14 05:05:22,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:05:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-14 05:05:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 254. [2020-10-14 05:05:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-14 05:05:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 282 transitions. [2020-10-14 05:05:22,362 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 282 transitions. Word has length 56 [2020-10-14 05:05:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:22,365 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 282 transitions. [2020-10-14 05:05:22,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 282 transitions. [2020-10-14 05:05:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:05:22,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:22,367 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:22,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:05:22,367 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 830087477, now seen corresponding path program 22 times [2020-10-14 05:05:22,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:22,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632471533] [2020-10-14 05:05:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:23,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:23,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:05:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:24,052 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-14 05:05:24,258 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 05:05:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:24,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:24,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:24,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:24,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:05:24,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632471533] [2020-10-14 05:05:24,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:24,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:05:24,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900424394] [2020-10-14 05:05:24,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:05:24,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:24,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:05:24,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:05:24,874 INFO L87 Difference]: Start difference. First operand 254 states and 282 transitions. Second operand 24 states. [2020-10-14 05:05:26,448 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:05:26,646 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:05:26,844 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 05:05:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:27,441 INFO L93 Difference]: Finished difference Result 303 states and 337 transitions. [2020-10-14 05:05:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:05:27,442 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 05:05:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:27,444 INFO L225 Difference]: With dead ends: 303 [2020-10-14 05:05:27,444 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 05:05:27,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:05:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 05:05:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 259. [2020-10-14 05:05:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-14 05:05:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 288 transitions. [2020-10-14 05:05:27,468 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 288 transitions. Word has length 56 [2020-10-14 05:05:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:27,469 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 288 transitions. [2020-10-14 05:05:27,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:05:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 288 transitions. [2020-10-14 05:05:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:05:27,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:27,470 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:27,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:05:27,470 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1484331765, now seen corresponding path program 5 times [2020-10-14 05:05:27,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:27,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095876440] [2020-10-14 05:05:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:27,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:28,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:28,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:05:28,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:29,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:29,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:29,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:29,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:29,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:29,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:29,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:29,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095876440] [2020-10-14 05:05:29,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:29,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:29,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935916342] [2020-10-14 05:05:29,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:29,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:29,821 INFO L87 Difference]: Start difference. First operand 259 states and 288 transitions. Second operand 25 states. [2020-10-14 05:05:31,769 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-10-14 05:05:32,041 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2020-10-14 05:05:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:32,696 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2020-10-14 05:05:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:05:32,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:05:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:32,699 INFO L225 Difference]: With dead ends: 287 [2020-10-14 05:05:32,699 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 05:05:32,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:05:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 05:05:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 261. [2020-10-14 05:05:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 05:05:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 290 transitions. [2020-10-14 05:05:32,726 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 290 transitions. Word has length 56 [2020-10-14 05:05:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:32,727 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 290 transitions. [2020-10-14 05:05:32,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 290 transitions. [2020-10-14 05:05:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:05:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:32,727 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:32,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:05:32,728 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1265038431, now seen corresponding path program 23 times [2020-10-14 05:05:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:32,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805098468] [2020-10-14 05:05:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:33,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:33,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:05:33,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:05:33,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:33,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:05:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:05:34,190 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 05:05:34,473 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-14 05:05:35,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:35,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:35,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:35,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:35,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:35,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:35,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805098468] [2020-10-14 05:05:35,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:35,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:35,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685070543] [2020-10-14 05:05:35,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:35,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:35,381 INFO L87 Difference]: Start difference. First operand 261 states and 290 transitions. Second operand 25 states. [2020-10-14 05:05:36,198 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 05:05:36,611 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:05:37,075 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 05:05:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:38,189 INFO L93 Difference]: Finished difference Result 321 states and 355 transitions. [2020-10-14 05:05:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:38,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 05:05:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:38,191 INFO L225 Difference]: With dead ends: 321 [2020-10-14 05:05:38,192 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 05:05:38,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:05:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 05:05:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 227. [2020-10-14 05:05:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 05:05:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2020-10-14 05:05:38,216 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 58 [2020-10-14 05:05:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:38,217 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2020-10-14 05:05:38,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2020-10-14 05:05:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:05:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:38,218 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:38,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:05:38,218 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1152873889, now seen corresponding path program 6 times [2020-10-14 05:05:38,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:38,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83907083] [2020-10-14 05:05:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:38,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:38,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:41,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:43,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:43,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:05:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:43,989 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 05:05:44,247 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-14 05:05:45,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:45,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83907083] [2020-10-14 05:05:45,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:45,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:45,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189857559] [2020-10-14 05:05:45,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:45,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:45,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:45,088 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand 25 states. [2020-10-14 05:05:45,891 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 05:05:46,104 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:05:46,394 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 05:05:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:47,283 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2020-10-14 05:05:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:47,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 05:05:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:47,286 INFO L225 Difference]: With dead ends: 259 [2020-10-14 05:05:47,286 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 05:05:47,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:05:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 05:05:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2020-10-14 05:05:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-14 05:05:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 242 transitions. [2020-10-14 05:05:47,309 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 242 transitions. Word has length 58 [2020-10-14 05:05:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:47,309 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 242 transitions. [2020-10-14 05:05:47,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 242 transitions. [2020-10-14 05:05:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:05:47,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:47,310 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:47,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:05:47,310 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1101175024, now seen corresponding path program 24 times [2020-10-14 05:05:47,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:47,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685171336] [2020-10-14 05:05:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:48,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:48,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:05:48,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:05:48,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:49,029 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-14 05:05:49,243 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 05:05:49,505 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 05:05:50,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:50,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:50,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:50,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685171336] [2020-10-14 05:05:50,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:50,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:05:50,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741255529] [2020-10-14 05:05:50,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:05:50,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:05:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:05:50,103 INFO L87 Difference]: Start difference. First operand 222 states and 242 transitions. Second operand 26 states. [2020-10-14 05:05:51,561 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-14 05:05:51,841 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2020-10-14 05:05:52,133 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2020-10-14 05:05:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:53,074 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2020-10-14 05:05:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:05:53,074 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 05:05:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:53,077 INFO L225 Difference]: With dead ends: 324 [2020-10-14 05:05:53,077 INFO L226 Difference]: Without dead ends: 320 [2020-10-14 05:05:53,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:05:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-14 05:05:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 268. [2020-10-14 05:05:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-14 05:05:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 295 transitions. [2020-10-14 05:05:53,109 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 295 transitions. Word has length 58 [2020-10-14 05:05:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:53,110 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 295 transitions. [2020-10-14 05:05:53,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:05:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 295 transitions. [2020-10-14 05:05:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:05:53,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:53,111 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:53,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:05:53,111 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash -753380976, now seen corresponding path program 6 times [2020-10-14 05:05:53,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:53,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886548429] [2020-10-14 05:05:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:05:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:55,146 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-14 05:05:55,331 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-14 05:05:55,624 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 05:05:55,939 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-14 05:05:56,130 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-14 05:05:56,309 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-14 05:05:56,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:56,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:56,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:56,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:56,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:56,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:56,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:56,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:56,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886548429] [2020-10-14 05:05:56,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:56,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:05:56,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933516042] [2020-10-14 05:05:56,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:05:56,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:05:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:05:56,837 INFO L87 Difference]: Start difference. First operand 268 states and 295 transitions. Second operand 26 states. [2020-10-14 05:05:57,899 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-14 05:05:58,137 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-14 05:05:58,615 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 99 [2020-10-14 05:05:58,912 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2020-10-14 05:05:59,199 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2020-10-14 05:06:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:00,120 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2020-10-14 05:06:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:06:00,121 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 05:06:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:00,123 INFO L225 Difference]: With dead ends: 311 [2020-10-14 05:06:00,123 INFO L226 Difference]: Without dead ends: 305 [2020-10-14 05:06:00,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:06:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-14 05:06:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 279. [2020-10-14 05:06:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 05:06:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 308 transitions. [2020-10-14 05:06:00,148 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 308 transitions. Word has length 58 [2020-10-14 05:06:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:00,148 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 308 transitions. [2020-10-14 05:06:00,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:06:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 308 transitions. [2020-10-14 05:06:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:06:00,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:00,149 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:00,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:06:00,149 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1618566613, now seen corresponding path program 25 times [2020-10-14 05:06:00,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:00,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512015307] [2020-10-14 05:06:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:01,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:01,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:06:01,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:06:01,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:01,650 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-14 05:06:01,885 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-14 05:06:02,193 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-14 05:06:02,343 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 05:06:02,550 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-14 05:06:03,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:03,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:03,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:03,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:03,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:03,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512015307] [2020-10-14 05:06:03,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:03,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:06:03,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495691502] [2020-10-14 05:06:03,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:06:03,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:06:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:06:03,480 INFO L87 Difference]: Start difference. First operand 279 states and 308 transitions. Second operand 27 states. [2020-10-14 05:06:04,449 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-14 05:06:04,690 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-14 05:06:05,099 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-14 05:06:05,390 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-14 05:06:05,803 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:06:06,078 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:06:06,660 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 104 [2020-10-14 05:06:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:08,054 INFO L93 Difference]: Finished difference Result 356 states and 392 transitions. [2020-10-14 05:06:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:06:08,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 05:06:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:08,056 INFO L225 Difference]: With dead ends: 356 [2020-10-14 05:06:08,056 INFO L226 Difference]: Without dead ends: 352 [2020-10-14 05:06:08,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=198, Invalid=2352, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:06:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-14 05:06:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 298. [2020-10-14 05:06:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-14 05:06:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 329 transitions. [2020-10-14 05:06:08,089 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 329 transitions. Word has length 60 [2020-10-14 05:06:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:08,089 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 329 transitions. [2020-10-14 05:06:08,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:06:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 329 transitions. [2020-10-14 05:06:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:06:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:08,090 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:08,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:06:08,090 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1476461205, now seen corresponding path program 6 times [2020-10-14 05:06:08,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:08,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365921892] [2020-10-14 05:06:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:08,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:09,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:06:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:09,766 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-14 05:06:10,033 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 05:06:10,331 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 05:06:10,532 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-14 05:06:10,731 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-14 05:06:11,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:11,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:11,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365921892] [2020-10-14 05:06:11,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:11,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:06:11,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549479919] [2020-10-14 05:06:11,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:06:11,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:11,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:06:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:06:11,350 INFO L87 Difference]: Start difference. First operand 298 states and 329 transitions. Second operand 27 states. [2020-10-14 05:06:13,091 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-10-14 05:06:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:14,237 INFO L93 Difference]: Finished difference Result 332 states and 365 transitions. [2020-10-14 05:06:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:06:14,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 05:06:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:14,239 INFO L225 Difference]: With dead ends: 332 [2020-10-14 05:06:14,240 INFO L226 Difference]: Without dead ends: 326 [2020-10-14 05:06:14,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:06:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-14 05:06:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 300. [2020-10-14 05:06:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-14 05:06:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 331 transitions. [2020-10-14 05:06:14,277 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 331 transitions. Word has length 60 [2020-10-14 05:06:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:14,277 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 331 transitions. [2020-10-14 05:06:14,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:06:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 331 transitions. [2020-10-14 05:06:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:06:14,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:14,279 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:14,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:06:14,279 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash -615677306, now seen corresponding path program 26 times [2020-10-14 05:06:14,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:14,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673592318] [2020-10-14 05:06:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:14,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:06:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:15,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:06:15,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:15,964 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-14 05:06:16,267 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-14 05:06:16,603 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-14 05:06:16,754 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 05:06:16,919 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-14 05:06:17,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:17,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:17,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:17,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:17,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673592318] [2020-10-14 05:06:17,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:17,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:06:17,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003697654] [2020-10-14 05:06:17,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:06:17,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:06:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:06:17,724 INFO L87 Difference]: Start difference. First operand 300 states and 331 transitions. Second operand 28 states. [2020-10-14 05:06:18,419 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 05:06:18,854 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:06:19,367 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:06:19,610 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:06:19,938 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-14 05:06:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:21,411 INFO L93 Difference]: Finished difference Result 372 states and 409 transitions. [2020-10-14 05:06:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:06:21,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 05:06:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:21,413 INFO L225 Difference]: With dead ends: 372 [2020-10-14 05:06:21,414 INFO L226 Difference]: Without dead ends: 368 [2020-10-14 05:06:21,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=143, Invalid=1837, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:06:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-14 05:06:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 314. [2020-10-14 05:06:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-14 05:06:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 346 transitions. [2020-10-14 05:06:21,458 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 346 transitions. Word has length 62 [2020-10-14 05:06:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:21,459 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 346 transitions. [2020-10-14 05:06:21,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:06:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 346 transitions. [2020-10-14 05:06:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:06:21,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:21,460 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:21,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:06:21,460 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1313076535, now seen corresponding path program 27 times [2020-10-14 05:06:21,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:21,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390358005] [2020-10-14 05:06:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:22,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:22,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:06:22,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:23,569 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-14 05:06:23,867 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-14 05:06:24,221 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-14 05:06:24,365 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-14 05:06:24,601 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-14 05:06:24,765 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 05:06:25,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:25,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:25,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:25,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:25,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:25,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:25,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:25,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:06:25,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390358005] [2020-10-14 05:06:25,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:25,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:06:25,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449449836] [2020-10-14 05:06:25,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:06:25,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:06:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:06:25,325 INFO L87 Difference]: Start difference. First operand 314 states and 346 transitions. Second operand 27 states. [2020-10-14 05:06:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:27,631 INFO L93 Difference]: Finished difference Result 377 states and 416 transitions. [2020-10-14 05:06:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:06:27,632 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 05:06:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:27,634 INFO L225 Difference]: With dead ends: 377 [2020-10-14 05:06:27,634 INFO L226 Difference]: Without dead ends: 373 [2020-10-14 05:06:27,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:06:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-14 05:06:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 319. [2020-10-14 05:06:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-14 05:06:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 352 transitions. [2020-10-14 05:06:27,682 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 352 transitions. Word has length 62 [2020-10-14 05:06:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:27,683 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 352 transitions. [2020-10-14 05:06:27,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:06:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 352 transitions. [2020-10-14 05:06:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:06:27,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:27,684 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:27,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:06:27,684 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:27,685 INFO L82 PathProgramCache]: Analyzing trace with hash 203857847, now seen corresponding path program 7 times [2020-10-14 05:06:27,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:27,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007513499] [2020-10-14 05:06:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:28,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:28,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:06:28,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:28,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:06:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:29,285 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 05:06:29,490 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 05:06:29,744 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-14 05:06:30,017 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-14 05:06:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:30,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:30,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:30,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:06:30,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007513499] [2020-10-14 05:06:30,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:30,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:06:30,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082467784] [2020-10-14 05:06:30,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:06:30,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:06:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:06:30,890 INFO L87 Difference]: Start difference. First operand 319 states and 352 transitions. Second operand 27 states. [2020-10-14 05:06:31,920 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 05:06:32,115 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 05:06:32,470 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 05:06:32,679 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:06:33,105 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:06:33,391 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:06:33,663 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-14 05:06:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:34,412 INFO L93 Difference]: Finished difference Result 353 states and 388 transitions. [2020-10-14 05:06:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:06:34,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 05:06:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:34,414 INFO L225 Difference]: With dead ends: 353 [2020-10-14 05:06:34,414 INFO L226 Difference]: Without dead ends: 347 [2020-10-14 05:06:34,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=192, Invalid=2064, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:06:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-14 05:06:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 321. [2020-10-14 05:06:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-14 05:06:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 354 transitions. [2020-10-14 05:06:34,450 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 354 transitions. Word has length 62 [2020-10-14 05:06:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:34,450 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 354 transitions. [2020-10-14 05:06:34,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:06:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 354 transitions. [2020-10-14 05:06:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:06:34,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:34,451 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:34,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:06:34,451 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:34,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1088272417, now seen corresponding path program 28 times [2020-10-14 05:06:34,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:34,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228042095] [2020-10-14 05:06:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:34,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:35,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:06:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:35,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:06:35,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:36,261 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 05:06:36,534 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-14 05:06:36,878 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-14 05:06:37,036 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-14 05:06:37,198 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-14 05:06:37,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:37,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:37,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:37,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:38,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228042095] [2020-10-14 05:06:38,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:38,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:06:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518402579] [2020-10-14 05:06:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:06:38,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:06:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:06:38,025 INFO L87 Difference]: Start difference. First operand 321 states and 354 transitions. Second operand 28 states. [2020-10-14 05:06:38,926 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 05:06:39,389 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:06:39,907 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:06:40,150 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:06:40,477 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-14 05:06:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:41,907 INFO L93 Difference]: Finished difference Result 397 states and 436 transitions. [2020-10-14 05:06:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:06:41,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 05:06:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:41,909 INFO L225 Difference]: With dead ends: 397 [2020-10-14 05:06:41,909 INFO L226 Difference]: Without dead ends: 375 [2020-10-14 05:06:41,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:06:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-14 05:06:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 282. [2020-10-14 05:06:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 05:06:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 312 transitions. [2020-10-14 05:06:41,952 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 312 transitions. Word has length 64 [2020-10-14 05:06:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:41,953 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 312 transitions. [2020-10-14 05:06:41,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:06:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 312 transitions. [2020-10-14 05:06:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:06:41,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:41,954 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:41,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:06:41,954 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2076543009, now seen corresponding path program 7 times [2020-10-14 05:06:41,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:41,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807247583] [2020-10-14 05:06:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:42,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:42,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:43,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:47,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:06:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:06:47,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:06:47,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:48,712 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-14 05:06:49,130 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-14 05:06:51,774 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 227 DAG size of output: 74 [2020-10-14 05:06:55,190 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 270 DAG size of output: 96 [2020-10-14 05:06:57,179 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 233 DAG size of output: 73 [2020-10-14 05:07:00,310 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 285 DAG size of output: 91 [2020-10-14 05:07:02,545 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 255 DAG size of output: 83 [2020-10-14 05:07:05,298 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 275 DAG size of output: 91 [2020-10-14 05:07:07,225 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 260 DAG size of output: 92 [2020-10-14 05:07:11,741 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 299 DAG size of output: 110 [2020-10-14 05:07:13,204 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 261 DAG size of output: 96 [2020-10-14 05:07:14,475 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 236 DAG size of output: 89 [2020-10-14 05:07:15,010 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 83 [2020-10-14 05:07:15,239 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 54 [2020-10-14 05:07:15,463 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 53 [2020-10-14 05:07:16,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:16,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:16,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807247583] [2020-10-14 05:07:16,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:16,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:07:16,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82395113] [2020-10-14 05:07:16,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:07:16,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:07:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:07:16,327 INFO L87 Difference]: Start difference. First operand 282 states and 312 transitions. Second operand 28 states. [2020-10-14 05:07:16,981 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 88 [2020-10-14 05:07:17,304 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 05:07:17,652 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-14 05:07:17,984 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-14 05:07:18,674 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 186 [2020-10-14 05:07:19,239 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 158 [2020-10-14 05:07:19,493 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-14 05:07:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:20,141 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2020-10-14 05:07:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:07:20,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 05:07:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:20,143 INFO L225 Difference]: With dead ends: 311 [2020-10-14 05:07:20,143 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 05:07:20,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:07:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 05:07:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-10-14 05:07:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 05:07:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2020-10-14 05:07:20,186 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 64 [2020-10-14 05:07:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:20,186 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2020-10-14 05:07:20,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:07:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2020-10-14 05:07:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:07:20,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:20,188 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:20,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:07:20,188 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash -805158254, now seen corresponding path program 29 times [2020-10-14 05:07:20,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:20,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101162511] [2020-10-14 05:07:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1284 [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:21,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:21,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:07:21,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:21,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:07:21,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:21,973 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-14 05:07:22,373 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 05:07:22,673 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-14 05:07:22,807 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-14 05:07:23,018 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-14 05:07:23,266 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-14 05:07:24,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:24,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:24,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:24,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:24,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101162511] [2020-10-14 05:07:24,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:24,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:07:24,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189281242] [2020-10-14 05:07:24,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:07:24,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:07:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:07:24,243 INFO L87 Difference]: Start difference. First operand 282 states and 311 transitions. Second operand 29 states. [2020-10-14 05:07:25,391 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 05:07:25,606 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:07:26,013 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:07:26,270 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:26,490 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:07:26,769 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:27,035 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:07:27,217 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:07:27,631 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-14 05:07:28,005 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-10-14 05:07:28,386 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-14 05:07:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:29,494 INFO L93 Difference]: Finished difference Result 326 states and 358 transitions. [2020-10-14 05:07:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:07:29,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 05:07:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:29,496 INFO L225 Difference]: With dead ends: 326 [2020-10-14 05:07:29,497 INFO L226 Difference]: Without dead ends: 322 [2020-10-14 05:07:29,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=215, Invalid=2647, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:07:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-14 05:07:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 305. [2020-10-14 05:07:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-14 05:07:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 337 transitions. [2020-10-14 05:07:29,545 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 337 transitions. Word has length 64 [2020-10-14 05:07:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:29,545 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 337 transitions. [2020-10-14 05:07:29,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:07:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 337 transitions. [2020-10-14 05:07:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:07:29,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:29,546 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 7, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:29,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:07:29,547 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash -852607263, now seen corresponding path program 8 times [2020-10-14 05:07:29,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:29,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327742099] [2020-10-14 05:07:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:30,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking...