/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=NARROWEST --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/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:21:08,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:21:08,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:21:08,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:21:08,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:21:08,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:21:08,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:21:08,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:21:08,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:21:08,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:21:08,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:21:08,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:21:08,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:21:08,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:21:08,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:21:08,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:21:08,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:21:08,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:21:08,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:21:08,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:21:08,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:21:08,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:21:08,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:21:08,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:21:08,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:21:08,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:21:08,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:21:08,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:21:08,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:21:09,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:21:09,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:21:09,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:21:09,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:21:09,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:21:09,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:21:09,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:21:09,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:21:09,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:21:09,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:21:09,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:21:09,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:21:09,007 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 [2020-10-13 10:21:09,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:21:09,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:21:09,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:21:09,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:21:09,043 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:21:09,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:21:09,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:21:09,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:21:09,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:21:09,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:21:09,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:21:09,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:21:09,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:21:09,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:21:09,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:21:09,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:21:09,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:21:09,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:21:09,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:21:09,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:21:09,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:21:09,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:21:09,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:21:09,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:21:09,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:21:09,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:21:09,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:21:09,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:21:09,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:21:09,050 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:21:09,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:21:09,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:21:09,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:21:09,400 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:21:09,401 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:21:09,402 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-13 10:21:09,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8027ef146/42b634807c37402ea3ceec72e8109626/FLAG053c58e98 [2020-10-13 10:21:10,008 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:21:10,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-13 10:21:10,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8027ef146/42b634807c37402ea3ceec72e8109626/FLAG053c58e98 [2020-10-13 10:21:10,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8027ef146/42b634807c37402ea3ceec72e8109626 [2020-10-13 10:21:10,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:21:10,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:21:10,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:10,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:21:10,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:21:10,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10, skipping insertion in model container [2020-10-13 10:21:10,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:21:10,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:21:10,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:10,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:21:10,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:10,944 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:21:10,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10 WrapperNode [2020-10-13 10:21:10,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:10,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:21:10,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:21:10,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:21:10,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:10,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:11,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:11,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (1/1) ... [2020-10-13 10:21:11,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:21:11,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:21:11,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:21:11,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:21:11,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (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 [2020-10-13 10:21:11,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:21:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:21:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:21:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:21:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:21:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:21:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:21:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:21:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:21:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:21:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:21:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:21:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:21:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:21:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:21:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:21:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:21:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:21:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:21:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:21:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:21:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:21:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:21:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:21:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:21:11,090 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:21:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:21:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:21:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:21:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:21:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:21:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:21:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:21:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:21:11,096 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:21:11,096 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:21:11,096 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:21:11,096 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:21:11,096 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:21:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:21:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:21:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:21:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:21:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:21:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:21:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:21:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:21:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:21:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:21:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:21:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:21:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:21:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:21:11,104 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:21:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:21:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:21:11,105 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:21:11,106 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:21:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:21:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:21:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:21:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:21:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:21:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:21:11,670 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:21:11,671 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 10:21:11,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:11 BoogieIcfgContainer [2020-10-13 10:21:11,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:21:11,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:21:11,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:21:11,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:21:11,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:21:10" (1/3) ... [2020-10-13 10:21:11,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9d2ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:11, skipping insertion in model container [2020-10-13 10:21:11,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:10" (2/3) ... [2020-10-13 10:21:11,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9d2ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:11, skipping insertion in model container [2020-10-13 10:21:11,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:11" (3/3) ... [2020-10-13 10:21:11,684 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-13 10:21:11,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:21:11,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:21:11,716 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:21:11,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:21:11,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:21:11,746 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:21:11,746 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:21:11,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:21:11,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:21:11,747 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:21:11,747 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:21:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 10:21:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:21:11,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:11,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:11,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:11,779 INFO L82 PathProgramCache]: Analyzing trace with hash 905993573, now seen corresponding path program 1 times [2020-10-13 10:21:11,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:11,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932360265] [2020-10-13 10:21:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:12,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:12,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:21:12,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:21:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-13 10:21:12,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:21:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:21:13,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:13,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:13,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:21:13,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:13,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:13,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:13,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:13,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932360265] [2020-10-13 10:21:13,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:13,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:21:13,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044131202] [2020-10-13 10:21:13,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:21:13,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:21:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:13,056 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 10:21:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:13,224 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-13 10:21:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:21:13,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 10:21:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:13,241 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:21:13,241 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:21:13,246 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 [2020-10-13 10:21:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:21:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:21:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:21:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-13 10:21:13,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2020-10-13 10:21:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:13,296 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-13 10:21:13,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:21:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-13 10:21:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:13,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:13,298 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] [2020-10-13 10:21:13,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:21:13,298 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 550815853, now seen corresponding path program 1 times [2020-10-13 10:21:13,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:13,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167718862] [2020-10-13 10:21:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:13,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:13,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-13 10:21:13,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:21:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:21:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:21:13,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:13,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:13,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:13,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:13,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:13,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:13,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167718862] [2020-10-13 10:21:13,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:13,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:21:13,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048807007] [2020-10-13 10:21:13,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:21:13,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:21:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:21:13,732 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2020-10-13 10:21:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:13,818 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-10-13 10:21:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:21:13,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 10:21:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:13,820 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:21:13,820 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:21:13,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:21:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:21:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:21:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:21:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-13 10:21:13,827 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 20 [2020-10-13 10:21:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:13,828 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-13 10:21:13,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:21:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-13 10:21:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:13,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:13,829 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] [2020-10-13 10:21:13,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:21:13,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 550817775, now seen corresponding path program 1 times [2020-10-13 10:21:13,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:13,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984401724] [2020-10-13 10:21:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:14,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-13 10:21:14,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:21:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:21:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:21:14,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:14,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:21:14,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:14,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984401724] [2020-10-13 10:21:14,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:14,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:21:14,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411930523] [2020-10-13 10:21:14,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:14,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:14,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:14,686 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 7 states. [2020-10-13 10:21:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:15,045 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-13 10:21:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:15,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 10:21:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:15,047 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:21:15,047 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:21:15,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:21:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-13 10:21:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:21:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-13 10:21:15,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 20 [2020-10-13 10:21:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:15,055 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-13 10:21:15,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-13 10:21:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:15,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:15,056 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] [2020-10-13 10:21:15,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:21:15,057 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash 548970733, now seen corresponding path program 1 times [2020-10-13 10:21:15,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:15,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398045948] [2020-10-13 10:21:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:15,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-13 10:21:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:15,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:15,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:15,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:15,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:15,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:15,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:15,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398045948] [2020-10-13 10:21:15,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:15,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:21:15,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140081283] [2020-10-13 10:21:15,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:15,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:15,451 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 8 states. [2020-10-13 10:21:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:15,911 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2020-10-13 10:21:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:15,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-13 10:21:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:15,913 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:21:15,913 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:21:15,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:21:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:21:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-13 10:21:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:21:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2020-10-13 10:21:15,924 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 20 [2020-10-13 10:21:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:15,924 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2020-10-13 10:21:15,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2020-10-13 10:21:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:21:15,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:15,926 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] [2020-10-13 10:21:15,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:21:15,926 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142159, now seen corresponding path program 1 times [2020-10-13 10:21:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:15,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631420306] [2020-10-13 10:21:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:21:16,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-13 10:21:16,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:21:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:16,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:16,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631420306] [2020-10-13 10:21:16,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:16,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:21:16,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584515352] [2020-10-13 10:21:16,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:16,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:16,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:16,507 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand 7 states. [2020-10-13 10:21:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:16,752 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2020-10-13 10:21:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:16,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 10:21:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:16,754 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:21:16,754 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:21:16,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:21:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2020-10-13 10:21:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:21:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-13 10:21:16,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 20 [2020-10-13 10:21:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:16,763 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-13 10:21:16,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-13 10:21:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:21:16,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:16,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:16,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:21:16,765 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2020944649, now seen corresponding path program 1 times [2020-10-13 10:21:16,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:16,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555617606] [2020-10-13 10:21:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:21:17,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:21:17,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-13 10:21:17,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:21:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:21:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:17,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:17,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:17,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:17,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:17,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:17,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555617606] [2020-10-13 10:21:17,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:17,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:17,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046799808] [2020-10-13 10:21:17,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:17,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:17,314 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 6 states. [2020-10-13 10:21:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:17,528 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-10-13 10:21:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:17,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:21:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:17,530 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:21:17,530 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:21:17,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:21:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2020-10-13 10:21:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:21:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-13 10:21:17,539 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2020-10-13 10:21:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:17,539 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-13 10:21:17,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-13 10:21:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:21:17,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:17,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:17,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:21:17,541 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash -244090245, now seen corresponding path program 1 times [2020-10-13 10:21:17,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:17,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535673767] [2020-10-13 10:21:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:21:17,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:17,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 10:21:17,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:21:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:17,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:17,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:17,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:17,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:17,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:17,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:17,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:17,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:17,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535673767] [2020-10-13 10:21:17,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:17,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:17,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864737393] [2020-10-13 10:21:17,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:17,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:17,668 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 6 states. [2020-10-13 10:21:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:18,055 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2020-10-13 10:21:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:18,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:21:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:18,057 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:21:18,057 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:21:18,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:21:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-10-13 10:21:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:21:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-13 10:21:18,066 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 21 [2020-10-13 10:21:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:18,066 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-13 10:21:18,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-13 10:21:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:21:18,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:18,068 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] [2020-10-13 10:21:18,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:21:18,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 61652601, now seen corresponding path program 1 times [2020-10-13 10:21:18,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:18,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693166536] [2020-10-13 10:21:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:18,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:18,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:18,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:21:18,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:18,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-13 10:21:18,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:21:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:21:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:19,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:19,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:19,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:19,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:19,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:19,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:19,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:19,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:19,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:19,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693166536] [2020-10-13 10:21:19,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:19,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:21:19,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597321281] [2020-10-13 10:21:19,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:21:19,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:21:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:19,538 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 11 states. [2020-10-13 10:21:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:20,316 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-10-13 10:21:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:21:20,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-13 10:21:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:20,319 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:21:20,319 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:21:20,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:21:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:21:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 67. [2020-10-13 10:21:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:21:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-13 10:21:20,340 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 23 [2020-10-13 10:21:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:20,341 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-13 10:21:20,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:21:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-13 10:21:20,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:21:20,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:20,344 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] [2020-10-13 10:21:20,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:21:20,345 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1838507005, now seen corresponding path program 1 times [2020-10-13 10:21:20,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:20,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202327987] [2020-10-13 10:21:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:20,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:20,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:21,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:21,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:21:21,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:21,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-10-13 10:21:21,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:21,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:21:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:22,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:22,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:22,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:22,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:22,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:22,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:22,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:22,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:22,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:22,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202327987] [2020-10-13 10:21:22,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:22,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:22,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563970848] [2020-10-13 10:21:22,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:22,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:22,075 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 10 states. [2020-10-13 10:21:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:22,513 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2020-10-13 10:21:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:22,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-13 10:21:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:22,514 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:21:22,514 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:21:22,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:21:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:21:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2020-10-13 10:21:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:21:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2020-10-13 10:21:22,532 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 23 [2020-10-13 10:21:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:22,532 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2020-10-13 10:21:22,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2020-10-13 10:21:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:21:22,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:22,536 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] [2020-10-13 10:21:22,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:21:22,537 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1799525935, now seen corresponding path program 1 times [2020-10-13 10:21:22,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:22,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531755150] [2020-10-13 10:21:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:23,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:25,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:25,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:21:25,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2697 [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:25,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:25,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:25,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:25,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:25,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:25,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:25,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:25,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531755150] [2020-10-13 10:21:25,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:25,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:25,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074242016] [2020-10-13 10:21:25,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:25,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:25,501 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 10 states. [2020-10-13 10:21:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:26,276 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2020-10-13 10:21:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:21:26,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:21:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:26,278 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:21:26,278 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:21:26,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:21:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:21:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-10-13 10:21:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:21:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-13 10:21:26,294 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 24 [2020-10-13 10:21:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:26,295 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-13 10:21:26,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-13 10:21:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:21:26,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:26,296 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] [2020-10-13 10:21:26,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:21:26,297 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -718586957, now seen corresponding path program 1 times [2020-10-13 10:21:26,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:26,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342760804] [2020-10-13 10:21:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:26,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:26,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:21:26,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:26,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 10:21:26,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:21:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:26,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:26,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:26,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:26,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:21:26,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:26,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342760804] [2020-10-13 10:21:26,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:26,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:26,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124327119] [2020-10-13 10:21:26,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:26,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:26,903 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 10 states. [2020-10-13 10:21:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:27,802 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2020-10-13 10:21:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:21:27,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:21:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:27,804 INFO L225 Difference]: With dead ends: 142 [2020-10-13 10:21:27,804 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 10:21:27,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:21:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 10:21:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 58. [2020-10-13 10:21:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:21:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-10-13 10:21:27,821 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 24 [2020-10-13 10:21:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:27,821 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-10-13 10:21:27,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-10-13 10:21:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:27,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:27,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:21:27,827 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 257989204, now seen corresponding path program 1 times [2020-10-13 10:21:27,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:27,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563777309] [2020-10-13 10:21:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:27,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:28,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:28,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:21:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-13 10:21:28,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:28,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:21:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:21:28,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:21:28,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:28,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:28,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:28,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:28,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:28,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:28,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:28,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:28,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:28,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:21:28,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563777309] [2020-10-13 10:21:28,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:28,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:28,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37605816] [2020-10-13 10:21:28,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:28,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:28,714 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 5 states. [2020-10-13 10:21:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:28,803 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2020-10-13 10:21:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:28,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 10:21:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:28,807 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:21:28,807 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:21:28,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:21:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 10:21:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:21:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2020-10-13 10:21:28,820 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 30 [2020-10-13 10:21:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:28,820 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2020-10-13 10:21:28,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2020-10-13 10:21:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:28,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:28,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:28,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:21:28,823 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash -328816810, now seen corresponding path program 1 times [2020-10-13 10:21:28,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:28,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034010386] [2020-10-13 10:21:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:29,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:29,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:29,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:29,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:29,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:21:29,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-13 10:21:29,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:21:29,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:30,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:30,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:30,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:30,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:30,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:30,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:30,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:30,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:30,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:21:30,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034010386] [2020-10-13 10:21:30,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:30,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 10:21:30,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131917058] [2020-10-13 10:21:30,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:30,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:30,069 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 8 states. [2020-10-13 10:21:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:30,406 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2020-10-13 10:21:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:21:30,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:21:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:30,408 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:21:30,408 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:21:30,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:21:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:21:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2020-10-13 10:21:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:21:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-13 10:21:30,423 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 30 [2020-10-13 10:21:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:30,423 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-13 10:21:30,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-13 10:21:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:21:30,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:30,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:30,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:21:30,426 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1537852882, now seen corresponding path program 1 times [2020-10-13 10:21:30,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:30,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642030757] [2020-10-13 10:21:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:30,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:30,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:21:30,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:30,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 10:21:30,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:30,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:21:30,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:30,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:21:30,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:30,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:30,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:30,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:30,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:30,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:30,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:30,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642030757] [2020-10-13 10:21:30,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:30,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:21:30,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081066128] [2020-10-13 10:21:30,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:21:30,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:21:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:30,597 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 7 states. [2020-10-13 10:21:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:30,847 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2020-10-13 10:21:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:30,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 10:21:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:30,848 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:21:30,848 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:21:30,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:21:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:21:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:21:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-13 10:21:30,858 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 30 [2020-10-13 10:21:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:30,858 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-13 10:21:30,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:21:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-13 10:21:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:21:30,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:30,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:30,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:21:30,860 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash 61621730, now seen corresponding path program 1 times [2020-10-13 10:21:30,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:30,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084347952] [2020-10-13 10:21:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:31,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:35,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:35,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:35,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:21:35,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:21:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 10:21:35,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:21:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:21:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:36,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:36,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:36,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:36,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:36,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:36,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:36,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:21:36,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084347952] [2020-10-13 10:21:36,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:36,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:36,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134712679] [2020-10-13 10:21:36,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:36,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:36,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:36,019 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 10 states. [2020-10-13 10:21:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:36,326 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-10-13 10:21:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:36,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:21:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:36,327 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:21:36,328 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:21:36,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:21:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:21:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-10-13 10:21:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:21:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-13 10:21:36,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 33 [2020-10-13 10:21:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:36,337 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-13 10:21:36,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-13 10:21:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:21:36,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:36,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:36,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:21:36,338 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1928291422, now seen corresponding path program 1 times [2020-10-13 10:21:36,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:36,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015098826] [2020-10-13 10:21:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:36,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:36,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:37,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:37,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:37,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:21:37,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:37,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:37,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:37,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:37,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:37,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015098826] [2020-10-13 10:21:37,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:37,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:21:37,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090514809] [2020-10-13 10:21:37,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:21:37,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:21:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:37,603 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 11 states. [2020-10-13 10:21:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:38,587 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2020-10-13 10:21:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:21:38,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 10:21:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:38,589 INFO L225 Difference]: With dead ends: 181 [2020-10-13 10:21:38,589 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 10:21:38,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:21:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 10:21:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2020-10-13 10:21:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:21:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-10-13 10:21:38,620 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 33 [2020-10-13 10:21:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:38,620 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-10-13 10:21:38,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:21:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-10-13 10:21:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:21:38,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:38,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:38,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:21:38,621 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:38,622 INFO L82 PathProgramCache]: Analyzing trace with hash -589821470, now seen corresponding path program 1 times [2020-10-13 10:21:38,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:38,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529331779] [2020-10-13 10:21:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:38,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:39,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:39,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:40,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:40,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:21:40,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:21:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-13 10:21:40,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:21:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:40,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:21:40,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:40,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:40,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:40,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:40,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:40,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:40,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:40,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:40,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:40,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:40,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529331779] [2020-10-13 10:21:40,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:40,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:40,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118894550] [2020-10-13 10:21:40,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:40,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:40,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:40,695 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 10 states. [2020-10-13 10:21:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:41,384 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-10-13 10:21:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:21:41,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:21:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:41,386 INFO L225 Difference]: With dead ends: 174 [2020-10-13 10:21:41,386 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 10:21:41,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:21:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 10:21:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 107. [2020-10-13 10:21:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:21:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2020-10-13 10:21:41,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 33 [2020-10-13 10:21:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:41,415 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2020-10-13 10:21:41,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2020-10-13 10:21:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:21:41,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:41,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:41,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:21:41,417 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 298692122, now seen corresponding path program 1 times [2020-10-13 10:21:41,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:41,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90433414] [2020-10-13 10:21:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:43,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:46,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:46,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:21:46,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 10:21:46,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:21:46,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:21:46,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:46,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:21:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:46,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:46,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:46,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:46,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:46,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:46,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:46,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90433414] [2020-10-13 10:21:46,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:46,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:21:46,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124192729] [2020-10-13 10:21:46,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:21:46,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:21:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:46,705 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand 11 states. [2020-10-13 10:21:47,281 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 10:21:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:48,081 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-10-13 10:21:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:21:48,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-13 10:21:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:48,083 INFO L225 Difference]: With dead ends: 248 [2020-10-13 10:21:48,083 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 10:21:48,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:21:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 10:21:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2020-10-13 10:21:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:21:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2020-10-13 10:21:48,118 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 34 [2020-10-13 10:21:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:48,119 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2020-10-13 10:21:48,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:21:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2020-10-13 10:21:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:21:48,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:48,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:48,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:21:48,120 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2075546526, now seen corresponding path program 1 times [2020-10-13 10:21:48,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:48,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301851026] [2020-10-13 10:21:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:48,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:21:49,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:49,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:21:49,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:49,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:49,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:49,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:49,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:49,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:49,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:49,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301851026] [2020-10-13 10:21:49,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:49,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:21:49,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879477282] [2020-10-13 10:21:49,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:21:49,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:21:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:21:49,864 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand 10 states. [2020-10-13 10:21:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:50,603 INFO L93 Difference]: Finished difference Result 235 states and 289 transitions. [2020-10-13 10:21:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:21:50,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-13 10:21:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:50,605 INFO L225 Difference]: With dead ends: 235 [2020-10-13 10:21:50,606 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 10:21:50,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:21:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 10:21:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 172. [2020-10-13 10:21:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 10:21:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 215 transitions. [2020-10-13 10:21:50,632 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 215 transitions. Word has length 34 [2020-10-13 10:21:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:50,632 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 215 transitions. [2020-10-13 10:21:50,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:21:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 215 transitions. [2020-10-13 10:21:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:21:50,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:50,634 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:50,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:21:50,634 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1583568302, now seen corresponding path program 2 times [2020-10-13 10:21:50,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:50,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751030416] [2020-10-13 10:21:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:52,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:21:52,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:53,120 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 10:21:53,255 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-13 10:21:53,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:53,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:53,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:53,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:53,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:53,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:53,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751030416] [2020-10-13 10:21:53,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:53,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:21:53,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068106780] [2020-10-13 10:21:53,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:21:53,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:21:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:21:53,602 INFO L87 Difference]: Start difference. First operand 172 states and 215 transitions. Second operand 13 states. [2020-10-13 10:21:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:54,831 INFO L93 Difference]: Finished difference Result 281 states and 354 transitions. [2020-10-13 10:21:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:21:54,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-13 10:21:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:54,834 INFO L225 Difference]: With dead ends: 281 [2020-10-13 10:21:54,834 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 10:21:54,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:21:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 10:21:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 214. [2020-10-13 10:21:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 10:21:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 271 transitions. [2020-10-13 10:21:54,861 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 271 transitions. Word has length 36 [2020-10-13 10:21:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:54,862 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 271 transitions. [2020-10-13 10:21:54,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:21:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 271 transitions. [2020-10-13 10:21:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:21:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:54,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:21:54,863 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 193286102, now seen corresponding path program 2 times [2020-10-13 10:21:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418156662] [2020-10-13 10:21:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:54,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:58,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3522 [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:58,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:21:58,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:58,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:21:58,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:58,861 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-13 10:21:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:59,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:59,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:59,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418156662] [2020-10-13 10:21:59,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:21:59,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079744146] [2020-10-13 10:21:59,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:21:59,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:21:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:21:59,086 INFO L87 Difference]: Start difference. First operand 214 states and 271 transitions. Second operand 13 states. [2020-10-13 10:21:59,432 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 10:21:59,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-13 10:22:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:00,381 INFO L93 Difference]: Finished difference Result 372 states and 467 transitions. [2020-10-13 10:22:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:22:00,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-13 10:22:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:00,390 INFO L225 Difference]: With dead ends: 372 [2020-10-13 10:22:00,390 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 10:22:00,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:22:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 10:22:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 257. [2020-10-13 10:22:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-13 10:22:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 326 transitions. [2020-10-13 10:22:00,439 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 326 transitions. Word has length 36 [2020-10-13 10:22:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:00,439 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 326 transitions. [2020-10-13 10:22:00,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:22:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 326 transitions. [2020-10-13 10:22:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:00,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:00,441 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:00,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:22:00,442 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 582077482, now seen corresponding path program 1 times [2020-10-13 10:22:00,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:00,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042870416] [2020-10-13 10:22:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:00,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:00,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3983 [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:22:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:04,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:04,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:04,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:04,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:04,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:04,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:04,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042870416] [2020-10-13 10:22:04,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:04,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:04,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367563122] [2020-10-13 10:22:04,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:04,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:04,812 INFO L87 Difference]: Start difference. First operand 257 states and 326 transitions. Second operand 12 states. [2020-10-13 10:22:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:05,709 INFO L93 Difference]: Finished difference Result 307 states and 384 transitions. [2020-10-13 10:22:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:22:05,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-13 10:22:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:05,713 INFO L225 Difference]: With dead ends: 307 [2020-10-13 10:22:05,713 INFO L226 Difference]: Without dead ends: 284 [2020-10-13 10:22:05,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:22:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-13 10:22:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-10-13 10:22:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 10:22:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2020-10-13 10:22:05,744 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 37 [2020-10-13 10:22:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:05,744 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2020-10-13 10:22:05,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2020-10-13 10:22:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:05,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:05,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:05,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:22:05,746 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1333999382, now seen corresponding path program 1 times [2020-10-13 10:22:05,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:05,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141517467] [2020-10-13 10:22:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:07,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:09,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:10,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:10,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:10,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 10:22:10,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:22:10,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:22:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:10,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:22:10,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:11,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:11,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:11,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:11,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:11,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:11,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:11,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:11,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:11,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141517467] [2020-10-13 10:22:11,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:11,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:11,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201234198] [2020-10-13 10:22:11,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:11,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:11,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:11,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:11,060 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand 12 states. [2020-10-13 10:22:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:11,852 INFO L93 Difference]: Finished difference Result 399 states and 509 transitions. [2020-10-13 10:22:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:22:11,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-13 10:22:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:11,855 INFO L225 Difference]: With dead ends: 399 [2020-10-13 10:22:11,855 INFO L226 Difference]: Without dead ends: 380 [2020-10-13 10:22:11,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:22:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-13 10:22:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 267. [2020-10-13 10:22:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-13 10:22:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 343 transitions. [2020-10-13 10:22:11,890 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 343 transitions. Word has length 37 [2020-10-13 10:22:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:11,891 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 343 transitions. [2020-10-13 10:22:11,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 343 transitions. [2020-10-13 10:22:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:22:11,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:11,892 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:11,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:22:11,893 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1184113510, now seen corresponding path program 2 times [2020-10-13 10:22:11,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:11,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473024399] [2020-10-13 10:22:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:16,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:16,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:22:16,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:17,227 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-13 10:22:17,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:17,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:17,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:17,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:17,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:17,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:17,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473024399] [2020-10-13 10:22:17,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:17,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:22:17,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171084070] [2020-10-13 10:22:17,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:22:17,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:22:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:22:17,622 INFO L87 Difference]: Start difference. First operand 267 states and 343 transitions. Second operand 16 states. [2020-10-13 10:22:18,701 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-13 10:22:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:20,800 INFO L93 Difference]: Finished difference Result 546 states and 687 transitions. [2020-10-13 10:22:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:22:20,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 10:22:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:20,806 INFO L225 Difference]: With dead ends: 546 [2020-10-13 10:22:20,806 INFO L226 Difference]: Without dead ends: 544 [2020-10-13 10:22:20,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=618, Invalid=2574, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:22:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-13 10:22:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 320. [2020-10-13 10:22:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-13 10:22:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 419 transitions. [2020-10-13 10:22:20,852 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 419 transitions. Word has length 37 [2020-10-13 10:22:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:20,852 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 419 transitions. [2020-10-13 10:22:20,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:22:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 419 transitions. [2020-10-13 10:22:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:22:20,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:20,859 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:20,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:22:20,859 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 311139158, now seen corresponding path program 1 times [2020-10-13 10:22:20,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:20,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098796019] [2020-10-13 10:22:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:21,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:21,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:21,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:22:21,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:21,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:21,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:21,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:21,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098796019] [2020-10-13 10:22:21,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:21,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:21,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410105265] [2020-10-13 10:22:21,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:21,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:21,639 INFO L87 Difference]: Start difference. First operand 320 states and 419 transitions. Second operand 12 states. [2020-10-13 10:22:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:22,513 INFO L93 Difference]: Finished difference Result 499 states and 643 transitions. [2020-10-13 10:22:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:22:22,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 10:22:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:22,516 INFO L225 Difference]: With dead ends: 499 [2020-10-13 10:22:22,516 INFO L226 Difference]: Without dead ends: 497 [2020-10-13 10:22:22,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:22:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-13 10:22:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 314. [2020-10-13 10:22:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-13 10:22:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 413 transitions. [2020-10-13 10:22:22,561 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 413 transitions. Word has length 38 [2020-10-13 10:22:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 413 transitions. [2020-10-13 10:22:22,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 413 transitions. [2020-10-13 10:22:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:22:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:22,562 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:22,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:22:22,563 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2006724574, now seen corresponding path program 3 times [2020-10-13 10:22:22,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:22,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190049703] [2020-10-13 10:22:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:26,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:26,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:22:26,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:22:26,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4095 [2020-10-13 10:22:26,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:22:26,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:26,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:22:26,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:27,051 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-13 10:22:27,178 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-13 10:22:27,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:27,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:27,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:27,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190049703] [2020-10-13 10:22:27,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:27,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:22:27,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843500973] [2020-10-13 10:22:27,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:22:27,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:22:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:22:27,555 INFO L87 Difference]: Start difference. First operand 314 states and 413 transitions. Second operand 14 states. [2020-10-13 10:22:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:28,671 INFO L93 Difference]: Finished difference Result 461 states and 594 transitions. [2020-10-13 10:22:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:22:28,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-13 10:22:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:28,675 INFO L225 Difference]: With dead ends: 461 [2020-10-13 10:22:28,675 INFO L226 Difference]: Without dead ends: 429 [2020-10-13 10:22:28,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:22:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-13 10:22:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 302. [2020-10-13 10:22:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-13 10:22:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 401 transitions. [2020-10-13 10:22:28,720 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 401 transitions. Word has length 39 [2020-10-13 10:22:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:28,720 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 401 transitions. [2020-10-13 10:22:28,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:22:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 401 transitions. [2020-10-13 10:22:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:22:28,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:28,722 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:28,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:22:28,722 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 212006942, now seen corresponding path program 3 times [2020-10-13 10:22:28,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:28,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354883409] [2020-10-13 10:22:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:30,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:33,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:33,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:22:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:34,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:34,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:34,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:34,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:34,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:34,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:34,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:34,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:34,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:34,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:34,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:34,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354883409] [2020-10-13 10:22:34,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:34,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:22:34,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266316302] [2020-10-13 10:22:34,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:22:34,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:34,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:22:34,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:22:34,160 INFO L87 Difference]: Start difference. First operand 302 states and 401 transitions. Second operand 14 states. [2020-10-13 10:22:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:34,943 INFO L93 Difference]: Finished difference Result 410 states and 535 transitions. [2020-10-13 10:22:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:22:34,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 10:22:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:34,947 INFO L225 Difference]: With dead ends: 410 [2020-10-13 10:22:34,947 INFO L226 Difference]: Without dead ends: 372 [2020-10-13 10:22:34,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:22:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-13 10:22:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 235. [2020-10-13 10:22:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-13 10:22:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 308 transitions. [2020-10-13 10:22:34,983 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 308 transitions. Word has length 40 [2020-10-13 10:22:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:34,983 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 308 transitions. [2020-10-13 10:22:34,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:22:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 308 transitions. [2020-10-13 10:22:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:22:34,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:34,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:34,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:22:34,985 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1614320007, now seen corresponding path program 1 times [2020-10-13 10:22:34,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:34,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734167427] [2020-10-13 10:22:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:35,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:40,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:40,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:22:40,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:22:40,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:22:40,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:40,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:22:40,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:40,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:22:40,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:40,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:40,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:40,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:40,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:40,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:40,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:22:40,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734167427] [2020-10-13 10:22:40,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:40,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:22:40,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889316844] [2020-10-13 10:22:40,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:22:40,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:22:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:22:40,184 INFO L87 Difference]: Start difference. First operand 235 states and 308 transitions. Second operand 12 states. [2020-10-13 10:22:40,552 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-13 10:22:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:41,395 INFO L93 Difference]: Finished difference Result 374 states and 479 transitions. [2020-10-13 10:22:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:22:41,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 10:22:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:41,399 INFO L225 Difference]: With dead ends: 374 [2020-10-13 10:22:41,399 INFO L226 Difference]: Without dead ends: 342 [2020-10-13 10:22:41,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:22:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-13 10:22:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 278. [2020-10-13 10:22:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 10:22:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 359 transitions. [2020-10-13 10:22:41,465 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 359 transitions. Word has length 43 [2020-10-13 10:22:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:41,466 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 359 transitions. [2020-10-13 10:22:41,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:22:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 359 transitions. [2020-10-13 10:22:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:22:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:41,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:41,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:22:41,468 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -813977597, now seen corresponding path program 4 times [2020-10-13 10:22:41,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:41,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429025774] [2020-10-13 10:22:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:41,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:42,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:42,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:22:42,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:22:42,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-13 10:22:42,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:22:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:22:42,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:42,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:42,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:42,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:42,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:42,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:42,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429025774] [2020-10-13 10:22:42,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:42,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:22:42,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532814180] [2020-10-13 10:22:42,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:22:42,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:22:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:22:42,557 INFO L87 Difference]: Start difference. First operand 278 states and 359 transitions. Second operand 10 states. [2020-10-13 10:22:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:43,118 INFO L93 Difference]: Finished difference Result 383 states and 483 transitions. [2020-10-13 10:22:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:22:43,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 10:22:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:43,120 INFO L225 Difference]: With dead ends: 383 [2020-10-13 10:22:43,120 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 10:22:43,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:22:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 10:22:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-13 10:22:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-13 10:22:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 303 transitions. [2020-10-13 10:22:43,152 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 303 transitions. Word has length 43 [2020-10-13 10:22:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:43,152 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 303 transitions. [2020-10-13 10:22:43,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:22:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 303 transitions. [2020-10-13 10:22:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:22:43,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:43,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:43,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:22:43,154 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1758328443, now seen corresponding path program 2 times [2020-10-13 10:22:43,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:43,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599245876] [2020-10-13 10:22:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:43,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:43,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:44,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:48,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:22:48,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:22:48,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:22:48,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:48,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:22:48,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:48,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:22:48,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:48,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:48,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:48,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:48,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:22:48,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:48,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:22:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:22:48,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599245876] [2020-10-13 10:22:48,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:48,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:22:48,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222842013] [2020-10-13 10:22:48,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:22:48,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:22:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:22:48,408 INFO L87 Difference]: Start difference. First operand 235 states and 303 transitions. Second operand 13 states. [2020-10-13 10:22:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:49,320 INFO L93 Difference]: Finished difference Result 315 states and 409 transitions. [2020-10-13 10:22:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:22:49,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 10:22:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:49,323 INFO L225 Difference]: With dead ends: 315 [2020-10-13 10:22:49,324 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 10:22:49,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:22:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 10:22:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2020-10-13 10:22:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 10:22:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 296 transitions. [2020-10-13 10:22:49,362 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 296 transitions. Word has length 46 [2020-10-13 10:22:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:49,362 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 296 transitions. [2020-10-13 10:22:49,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:22:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 296 transitions. [2020-10-13 10:22:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:22:49,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:49,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:49,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:22:49,364 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash -669969161, now seen corresponding path program 5 times [2020-10-13 10:22:49,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:49,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469661523] [2020-10-13 10:22:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:50,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:51,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:51,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:22:51,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:22:51,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2368 [2020-10-13 10:22:51,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:22:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:22:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:52,003 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-10-13 10:22:52,249 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-10-13 10:22:52,673 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 46 [2020-10-13 10:22:52,829 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-13 10:22:52,963 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-13 10:22:53,094 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-13 10:22:53,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:22:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:53,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:22:53,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:22:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:22:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:22:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:22:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:22:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:22:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:22:53,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469661523] [2020-10-13 10:22:53,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:22:53,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:22:53,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596236424] [2020-10-13 10:22:53,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:22:53,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:22:53,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:22:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:22:53,311 INFO L87 Difference]: Start difference. First operand 230 states and 296 transitions. Second operand 16 states. [2020-10-13 10:22:53,822 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 42 [2020-10-13 10:22:53,990 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 41 [2020-10-13 10:22:54,203 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-13 10:22:54,450 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-13 10:22:54,678 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 54 [2020-10-13 10:22:54,840 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-13 10:22:55,519 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-13 10:22:55,719 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 10:22:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:22:56,218 INFO L93 Difference]: Finished difference Result 547 states and 695 transitions. [2020-10-13 10:22:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:22:56,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-13 10:22:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:22:56,221 INFO L225 Difference]: With dead ends: 547 [2020-10-13 10:22:56,221 INFO L226 Difference]: Without dead ends: 515 [2020-10-13 10:22:56,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:22:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-13 10:22:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 389. [2020-10-13 10:22:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-13 10:22:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 497 transitions. [2020-10-13 10:22:56,278 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 497 transitions. Word has length 46 [2020-10-13 10:22:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:22:56,278 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 497 transitions. [2020-10-13 10:22:56,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:22:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 497 transitions. [2020-10-13 10:22:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:22:56,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:22:56,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:22:56,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:22:56,280 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:22:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:22:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1106885243, now seen corresponding path program 3 times [2020-10-13 10:22:56,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:22:56,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367256152] [2020-10-13 10:22:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:22:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:22:56,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:57,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:58,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:22:59,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:22:59,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:22:59,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:22:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3626 [2020-10-13 10:22:59,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:22:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:22:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:22:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:22:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:00,176 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2020-10-13 10:23:00,343 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-10-13 10:23:00,543 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-13 10:23:00,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:00,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:00,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367256152] [2020-10-13 10:23:00,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:00,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:23:00,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759103202] [2020-10-13 10:23:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:23:00,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:23:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:23:00,840 INFO L87 Difference]: Start difference. First operand 389 states and 497 transitions. Second operand 15 states. [2020-10-13 10:23:01,217 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-13 10:23:01,408 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-13 10:23:01,670 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:23:01,895 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-13 10:23:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:02,951 INFO L93 Difference]: Finished difference Result 673 states and 859 transitions. [2020-10-13 10:23:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:23:02,952 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-13 10:23:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:02,956 INFO L225 Difference]: With dead ends: 673 [2020-10-13 10:23:02,956 INFO L226 Difference]: Without dead ends: 635 [2020-10-13 10:23:02,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:23:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-13 10:23:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 537. [2020-10-13 10:23:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-13 10:23:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 671 transitions. [2020-10-13 10:23:03,054 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 671 transitions. Word has length 46 [2020-10-13 10:23:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:03,054 INFO L479 AbstractCegarLoop]: Abstraction has 537 states and 671 transitions. [2020-10-13 10:23:03,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:23:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 671 transitions. [2020-10-13 10:23:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:23:03,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:03,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:03,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:23:03,057 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash -205136433, now seen corresponding path program 4 times [2020-10-13 10:23:03,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:03,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81982440] [2020-10-13 10:23:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:03,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:03,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:07,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:23:07,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4060 [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:23:07,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:07,428 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2020-10-13 10:23:07,663 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 10:23:07,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:07,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:07,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:07,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81982440] [2020-10-13 10:23:07,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:07,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:23:07,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980937672] [2020-10-13 10:23:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:23:07,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:23:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:23:07,926 INFO L87 Difference]: Start difference. First operand 537 states and 671 transitions. Second operand 12 states. [2020-10-13 10:23:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:09,382 INFO L93 Difference]: Finished difference Result 610 states and 755 transitions. [2020-10-13 10:23:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:23:09,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 10:23:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:09,387 INFO L225 Difference]: With dead ends: 610 [2020-10-13 10:23:09,387 INFO L226 Difference]: Without dead ends: 608 [2020-10-13 10:23:09,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:23:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-13 10:23:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 535. [2020-10-13 10:23:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-13 10:23:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 668 transitions. [2020-10-13 10:23:09,492 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 668 transitions. Word has length 47 [2020-10-13 10:23:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:09,492 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 668 transitions. [2020-10-13 10:23:09,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:23:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 668 transitions. [2020-10-13 10:23:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:23:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:09,495 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:09,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:23:09,495 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1186980989, now seen corresponding path program 6 times [2020-10-13 10:23:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:09,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798204302] [2020-10-13 10:23:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:14,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:14,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:23:14,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:23:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:14,835 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-13 10:23:14,993 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-13 10:23:15,131 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 10:23:15,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:15,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:15,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798204302] [2020-10-13 10:23:15,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:15,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:23:15,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843140957] [2020-10-13 10:23:15,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:23:15,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:23:15,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:23:15,387 INFO L87 Difference]: Start difference. First operand 535 states and 668 transitions. Second operand 15 states. [2020-10-13 10:23:16,292 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 10:23:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:17,457 INFO L93 Difference]: Finished difference Result 830 states and 1037 transitions. [2020-10-13 10:23:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:23:17,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-13 10:23:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:17,461 INFO L225 Difference]: With dead ends: 830 [2020-10-13 10:23:17,461 INFO L226 Difference]: Without dead ends: 798 [2020-10-13 10:23:17,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:23:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-10-13 10:23:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 687. [2020-10-13 10:23:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-10-13 10:23:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 866 transitions. [2020-10-13 10:23:17,581 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 866 transitions. Word has length 49 [2020-10-13 10:23:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:17,581 INFO L479 AbstractCegarLoop]: Abstraction has 687 states and 866 transitions. [2020-10-13 10:23:17,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:23:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 866 transitions. [2020-10-13 10:23:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:23:17,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:17,583 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:17,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:23:17,583 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:17,584 INFO L82 PathProgramCache]: Analyzing trace with hash 589873415, now seen corresponding path program 4 times [2020-10-13 10:23:17,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:17,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957370949] [2020-10-13 10:23:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:19,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:20,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:22,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:22,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:23:22,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:23:22,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:23,046 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-13 10:23:23,206 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 10:23:23,449 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 10:23:23,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:23,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957370949] [2020-10-13 10:23:23,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:23,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:23:23,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705642874] [2020-10-13 10:23:23,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:23:23,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:23:23,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:23:23,800 INFO L87 Difference]: Start difference. First operand 687 states and 866 transitions. Second operand 17 states. [2020-10-13 10:23:24,341 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 36 [2020-10-13 10:23:24,603 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-13 10:23:24,833 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-13 10:23:25,139 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-13 10:23:25,310 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 10:23:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:26,334 INFO L93 Difference]: Finished difference Result 975 states and 1234 transitions. [2020-10-13 10:23:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:23:26,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-13 10:23:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:26,344 INFO L225 Difference]: With dead ends: 975 [2020-10-13 10:23:26,344 INFO L226 Difference]: Without dead ends: 937 [2020-10-13 10:23:26,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:23:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2020-10-13 10:23:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 721. [2020-10-13 10:23:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-10-13 10:23:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 912 transitions. [2020-10-13 10:23:26,477 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 912 transitions. Word has length 49 [2020-10-13 10:23:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:26,477 INFO L479 AbstractCegarLoop]: Abstraction has 721 states and 912 transitions. [2020-10-13 10:23:26,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:23:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 912 transitions. [2020-10-13 10:23:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:23:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:26,480 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:26,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:23:26,480 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash 947366083, now seen corresponding path program 5 times [2020-10-13 10:23:26,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:26,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909408820] [2020-10-13 10:23:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:26,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:27,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:28,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:29,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:31,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:31,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:23:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:31,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:31,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:31,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909408820] [2020-10-13 10:23:31,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:31,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:23:31,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935887531] [2020-10-13 10:23:31,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:23:31,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:23:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:23:31,951 INFO L87 Difference]: Start difference. First operand 721 states and 912 transitions. Second operand 14 states. [2020-10-13 10:23:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:32,899 INFO L93 Difference]: Finished difference Result 948 states and 1180 transitions. [2020-10-13 10:23:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:23:32,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-13 10:23:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:32,905 INFO L225 Difference]: With dead ends: 948 [2020-10-13 10:23:32,905 INFO L226 Difference]: Without dead ends: 910 [2020-10-13 10:23:32,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:23:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-10-13 10:23:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 587. [2020-10-13 10:23:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-13 10:23:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 750 transitions. [2020-10-13 10:23:32,999 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 750 transitions. Word has length 50 [2020-10-13 10:23:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:33,000 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 750 transitions. [2020-10-13 10:23:33,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:23:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 750 transitions. [2020-10-13 10:23:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:23:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:33,002 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:33,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:23:33,002 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 872630191, now seen corresponding path program 2 times [2020-10-13 10:23:33,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:33,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022209694] [2020-10-13 10:23:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:33,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:33,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:38,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:23:38,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:23:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:38,309 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-13 10:23:38,456 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-10-13 10:23:38,581 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 10:23:38,736 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-13 10:23:39,033 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-13 10:23:39,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:39,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:39,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:39,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:39,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:39,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:23:39,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:39,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:39,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022209694] [2020-10-13 10:23:39,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:39,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:23:39,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916217900] [2020-10-13 10:23:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:23:39,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:23:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:23:39,668 INFO L87 Difference]: Start difference. First operand 587 states and 750 transitions. Second operand 21 states. [2020-10-13 10:23:40,464 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-13 10:23:40,804 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-13 10:23:41,361 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-13 10:23:41,660 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-10-13 10:23:41,868 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 10:23:42,223 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-13 10:23:42,668 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 100 [2020-10-13 10:23:43,125 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-13 10:23:43,402 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-13 10:23:43,622 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-13 10:23:43,909 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-13 10:23:44,348 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-13 10:23:44,626 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-13 10:23:44,979 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 10:23:45,235 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-13 10:23:45,698 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-13 10:23:46,307 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-13 10:23:46,457 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-13 10:23:46,598 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-13 10:23:46,863 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-13 10:23:47,167 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-13 10:23:47,544 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-13 10:23:47,938 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-13 10:23:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:23:49,700 INFO L93 Difference]: Finished difference Result 1530 states and 1904 transitions. [2020-10-13 10:23:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 10:23:49,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-13 10:23:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:23:49,707 INFO L225 Difference]: With dead ends: 1530 [2020-10-13 10:23:49,707 INFO L226 Difference]: Without dead ends: 1460 [2020-10-13 10:23:49,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=990, Invalid=6492, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 10:23:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-13 10:23:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 740. [2020-10-13 10:23:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-13 10:23:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 945 transitions. [2020-10-13 10:23:49,845 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 945 transitions. Word has length 50 [2020-10-13 10:23:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:23:49,845 INFO L479 AbstractCegarLoop]: Abstraction has 740 states and 945 transitions. [2020-10-13 10:23:49,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:23:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 945 transitions. [2020-10-13 10:23:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:23:49,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:23:49,848 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:23:49,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:23:49,849 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:23:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:23:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1645482701, now seen corresponding path program 6 times [2020-10-13 10:23:49,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:23:49,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023467354] [2020-10-13 10:23:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:23:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:49,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:51,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:51,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:51,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:54,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:55,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:55,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:23:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:55,455 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 10:23:55,630 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-13 10:23:55,940 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-13 10:23:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:23:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:23:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:23:56,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:23:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:23:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:23:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023467354] [2020-10-13 10:23:56,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:23:56,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:23:56,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663507353] [2020-10-13 10:23:56,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:23:56,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:23:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:23:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:23:56,611 INFO L87 Difference]: Start difference. First operand 740 states and 945 transitions. Second operand 21 states. [2020-10-13 10:23:57,426 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 10:23:57,755 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-13 10:23:57,950 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-13 10:23:58,406 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-10-13 10:23:58,986 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-10-13 10:24:00,382 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-13 10:24:00,655 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-13 10:24:01,226 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-13 10:24:01,460 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-13 10:24:01,663 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-13 10:24:02,045 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-13 10:24:02,746 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-13 10:24:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:03,766 INFO L93 Difference]: Finished difference Result 1344 states and 1678 transitions. [2020-10-13 10:24:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:24:03,767 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-13 10:24:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:03,773 INFO L225 Difference]: With dead ends: 1344 [2020-10-13 10:24:03,773 INFO L226 Difference]: Without dead ends: 1342 [2020-10-13 10:24:03,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:24:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2020-10-13 10:24:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 716. [2020-10-13 10:24:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2020-10-13 10:24:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 913 transitions. [2020-10-13 10:24:03,924 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 913 transitions. Word has length 50 [2020-10-13 10:24:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:03,924 INFO L479 AbstractCegarLoop]: Abstraction has 716 states and 913 transitions. [2020-10-13 10:24:03,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:24:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 913 transitions. [2020-10-13 10:24:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:24:03,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:03,926 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:03,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:24:03,926 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:03,926 INFO L82 PathProgramCache]: Analyzing trace with hash 478263405, now seen corresponding path program 1 times [2020-10-13 10:24:03,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:03,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355143057] [2020-10-13 10:24:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:06,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:06,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:07,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:09,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:09,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:24:09,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:24:09,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:09,358 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-13 10:24:09,506 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 10:24:09,739 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 10:24:09,957 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-13 10:24:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:10,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:10,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:10,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:10,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:10,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:10,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:10,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:10,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355143057] [2020-10-13 10:24:10,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:10,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:24:10,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139495666] [2020-10-13 10:24:10,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:24:10,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:24:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:24:10,497 INFO L87 Difference]: Start difference. First operand 716 states and 913 transitions. Second operand 20 states. [2020-10-13 10:24:10,859 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 10:24:11,236 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-13 10:24:11,504 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-13 10:24:12,063 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2020-10-13 10:24:12,305 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-13 10:24:12,555 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2020-10-13 10:24:12,945 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 10:24:13,586 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2020-10-13 10:24:14,146 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2020-10-13 10:24:14,505 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-13 10:24:14,985 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-13 10:24:15,483 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-10-13 10:24:15,965 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-13 10:24:16,916 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-13 10:24:17,096 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 10:24:17,495 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-13 10:24:18,188 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-13 10:24:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:19,400 INFO L93 Difference]: Finished difference Result 1395 states and 1722 transitions. [2020-10-13 10:24:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:24:19,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-13 10:24:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:19,406 INFO L225 Difference]: With dead ends: 1395 [2020-10-13 10:24:19,406 INFO L226 Difference]: Without dead ends: 1235 [2020-10-13 10:24:19,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1031, Invalid=4975, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 10:24:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-10-13 10:24:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 758. [2020-10-13 10:24:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 758 states. [2020-10-13 10:24:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 972 transitions. [2020-10-13 10:24:19,526 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 972 transitions. Word has length 50 [2020-10-13 10:24:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:19,527 INFO L479 AbstractCegarLoop]: Abstraction has 758 states and 972 transitions. [2020-10-13 10:24:19,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:24:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 972 transitions. [2020-10-13 10:24:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:24:19,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:19,529 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:19,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:24:19,529 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2039849487, now seen corresponding path program 1 times [2020-10-13 10:24:19,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:19,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373953283] [2020-10-13 10:24:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:20,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:21,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:24,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:24,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:24:24,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:24:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:24,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:24,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:24,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:24,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:24,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:24,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373953283] [2020-10-13 10:24:24,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:24,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:24:24,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607022915] [2020-10-13 10:24:24,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:24:24,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:24,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:24:24,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:24:24,955 INFO L87 Difference]: Start difference. First operand 758 states and 972 transitions. Second operand 14 states. [2020-10-13 10:24:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:26,571 INFO L93 Difference]: Finished difference Result 1099 states and 1398 transitions. [2020-10-13 10:24:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:24:26,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-13 10:24:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:26,580 INFO L225 Difference]: With dead ends: 1099 [2020-10-13 10:24:26,580 INFO L226 Difference]: Without dead ends: 1097 [2020-10-13 10:24:26,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:24:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2020-10-13 10:24:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 841. [2020-10-13 10:24:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-10-13 10:24:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1086 transitions. [2020-10-13 10:24:26,709 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1086 transitions. Word has length 50 [2020-10-13 10:24:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:26,709 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1086 transitions. [2020-10-13 10:24:26,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:24:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1086 transitions. [2020-10-13 10:24:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:24:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:26,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:26,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:24:26,711 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1733625481, now seen corresponding path program 7 times [2020-10-13 10:24:26,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:26,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218262667] [2020-10-13 10:24:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:26,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:28,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:31,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:31,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:24:31,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:24:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:32,376 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-13 10:24:32,580 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-13 10:24:33,068 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-13 10:24:33,373 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-10-13 10:24:33,691 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-13 10:24:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:34,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:34,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:34,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:34,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218262667] [2020-10-13 10:24:34,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:34,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:24:34,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743876016] [2020-10-13 10:24:34,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:24:34,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:24:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:24:34,289 INFO L87 Difference]: Start difference. First operand 841 states and 1086 transitions. Second operand 20 states. [2020-10-13 10:24:34,818 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-13 10:24:35,379 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-13 10:24:35,634 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-13 10:24:36,404 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2020-10-13 10:24:37,032 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2020-10-13 10:24:37,196 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 10:24:37,732 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-13 10:24:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:39,591 INFO L93 Difference]: Finished difference Result 1413 states and 1812 transitions. [2020-10-13 10:24:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:24:39,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-13 10:24:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:39,596 INFO L225 Difference]: With dead ends: 1413 [2020-10-13 10:24:39,596 INFO L226 Difference]: Without dead ends: 1381 [2020-10-13 10:24:39,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:24:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2020-10-13 10:24:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 994. [2020-10-13 10:24:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-10-13 10:24:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1282 transitions. [2020-10-13 10:24:39,763 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1282 transitions. Word has length 52 [2020-10-13 10:24:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:39,764 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1282 transitions. [2020-10-13 10:24:39,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:24:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1282 transitions. [2020-10-13 10:24:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:24:39,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:39,766 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:39,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:24:39,766 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 43228923, now seen corresponding path program 5 times [2020-10-13 10:24:39,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:39,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740776543] [2020-10-13 10:24:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:39,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:44,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:44,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:24:44,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:24:44,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-13 10:24:44,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:44,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:24:44,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:44,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:24:44,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:45,387 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-13 10:24:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:24:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:45,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:45,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:24:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:24:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:24:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:24:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:24:45,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740776543] [2020-10-13 10:24:45,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:24:45,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:24:45,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775449005] [2020-10-13 10:24:45,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:24:45,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:24:45,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:24:45,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:24:45,814 INFO L87 Difference]: Start difference. First operand 994 states and 1282 transitions. Second operand 15 states. [2020-10-13 10:24:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:24:47,529 INFO L93 Difference]: Finished difference Result 1198 states and 1528 transitions. [2020-10-13 10:24:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:24:47,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-13 10:24:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:24:47,533 INFO L225 Difference]: With dead ends: 1198 [2020-10-13 10:24:47,533 INFO L226 Difference]: Without dead ends: 1144 [2020-10-13 10:24:47,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:24:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-10-13 10:24:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 930. [2020-10-13 10:24:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-10-13 10:24:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1202 transitions. [2020-10-13 10:24:47,680 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1202 transitions. Word has length 52 [2020-10-13 10:24:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:24:47,680 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 1202 transitions. [2020-10-13 10:24:47,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:24:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1202 transitions. [2020-10-13 10:24:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:24:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:24:47,682 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:24:47,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:24:47,682 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:24:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:24:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash -595598389, now seen corresponding path program 3 times [2020-10-13 10:24:47,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:24:47,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782469080] [2020-10-13 10:24:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:24:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:24:47,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:49,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:52,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:24:52,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5220 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:24:52,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0