/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:58:20,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:58:20,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:58:20,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:58:20,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:58:20,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:58:20,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:58:20,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:58:20,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:58:20,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:58:20,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:58:20,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:58:20,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:58:20,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:58:20,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:58:20,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:58:20,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:58:20,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:58:21,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:58:21,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:58:21,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:58:21,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:58:21,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:58:21,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:58:21,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:58:21,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:58:21,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:58:21,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:58:21,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:58:21,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:58:21,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:58:21,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:58:21,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:58:21,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:58:21,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:58:21,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:58:21,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:58:21,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:58:21,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:58:21,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:58:21,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:58:21,034 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 [2020-10-27 01:58:21,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:58:21,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:58:21,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:58:21,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:58:21,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:58:21,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:58:21,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:58:21,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:58:21,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:58:21,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:58:21,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:58:21,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:58:21,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:58:21,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:58:21,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:58:21,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:58:21,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:58:21,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:58:21,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:58:21,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:58:21,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:58:21,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:58:21,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:58:21,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:58:21,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:58:21,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:58:21,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:58:21,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:58:21,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:58:21,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:58:21,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:58:21,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:58:21,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:58:21,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:58:21,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:58:21,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2020-10-27 01:58:21,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8eaffd6/eb5418663fa34a228055b4b34e0e34a3/FLAG7b4a46b43 [2020-10-27 01:58:22,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:58:22,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c24.i [2020-10-27 01:58:22,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8eaffd6/eb5418663fa34a228055b4b34e0e34a3/FLAG7b4a46b43 [2020-10-27 01:58:22,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8eaffd6/eb5418663fa34a228055b4b34e0e34a3 [2020-10-27 01:58:22,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:58:22,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:58:22,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:22,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:58:22,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:58:22,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:22" (1/1) ... [2020-10-27 01:58:22,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1fcb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:22, skipping insertion in model container [2020-10-27 01:58:22,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:22" (1/1) ... [2020-10-27 01:58:22,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:58:22,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:58:23,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:23,039 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:58:23,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:23,114 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:58:23,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23 WrapperNode [2020-10-27 01:58:23,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:23,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:58:23,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:58:23,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:58:23,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (1/1) ... [2020-10-27 01:58:23,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:58:23,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:58:23,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:58:23,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:58:23,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (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 [2020-10-27 01:58:23,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:58:23,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:58:23,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:58:23,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:58:23,263 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2020-10-27 01:58:23,263 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-27 01:58:23,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:58:23,263 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2020-10-27 01:58:23,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:58:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2020-10-27 01:58:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-10-27 01:58:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2020-10-27 01:58:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2020-10-27 01:58:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2020-10-27 01:58:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure index [2020-10-27 01:58:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2020-10-27 01:58:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2020-10-27 01:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:58:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:58:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:58:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:58:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-27 01:58:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-10-27 01:58:23,913 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:58:23,914 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:58:23,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:23 BoogieIcfgContainer [2020-10-27 01:58:23,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:58:23,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:58:23,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:58:23,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:58:23,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:58:22" (1/3) ... [2020-10-27 01:58:23,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32944d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:23, skipping insertion in model container [2020-10-27 01:58:23,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:23" (2/3) ... [2020-10-27 01:58:23,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32944d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:23, skipping insertion in model container [2020-10-27 01:58:23,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:23" (3/3) ... [2020-10-27 01:58:23,925 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2020-10-27 01:58:23,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:58:23,942 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:58:23,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:58:23,985 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:58:23,985 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:58:23,985 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:58:23,985 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:58:23,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:58:23,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:58:23,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:58:23,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:58:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-27 01:58:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:58:24,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:24,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:24,011 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash 927386423, now seen corresponding path program 1 times [2020-10-27 01:58:24,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:24,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439803796] [2020-10-27 01:58:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:24,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:24,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:58:24,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:24,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 01:58:24,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:24,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:24,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:24,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:24,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:24,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:58:24,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439803796] [2020-10-27 01:58:24,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:24,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:58:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570005082] [2020-10-27 01:58:24,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:58:24,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:58:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:58:24,536 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-10-27 01:58:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:24,813 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-10-27 01:58:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:58:24,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 01:58:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:24,827 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:58:24,827 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:58:24,831 INFO L677 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 [2020-10-27 01:58:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:58:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:58:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:58:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-27 01:58:24,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 15 [2020-10-27 01:58:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-27 01:58:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:58:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-27 01:58:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:58:24,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:24,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:24,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:58:24,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911974, now seen corresponding path program 1 times [2020-10-27 01:58:24,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:24,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998758908] [2020-10-27 01:58:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:24,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:25,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:58:25,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 01:58:25,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:58:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:25,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:58:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:25,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:25,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:25,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:25,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:25,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:58:25,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:25,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:25,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:25,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998758908] [2020-10-27 01:58:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:58:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343004928] [2020-10-27 01:58:25,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:58:25,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:58:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:58:25,251 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2020-10-27 01:58:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:25,465 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2020-10-27 01:58:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:58:25,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:58:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:25,467 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:58:25,468 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:58:25,469 INFO L677 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 [2020-10-27 01:58:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:58:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-10-27 01:58:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:58:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-27 01:58:25,486 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2020-10-27 01:58:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:25,486 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-27 01:58:25,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:58:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-27 01:58:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:58:25,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:25,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:58:25,488 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 425362682, now seen corresponding path program 1 times [2020-10-27 01:58:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:25,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392035028] [2020-10-27 01:58:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:26,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:58:26,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:26,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-27 01:58:26,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:26,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:58:26,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:26,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:58:26,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:26,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:26,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:26,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:26,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392035028] [2020-10-27 01:58:26,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:26,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:58:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606041547] [2020-10-27 01:58:26,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:58:26,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:58:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:26,559 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-10-27 01:58:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:26,848 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2020-10-27 01:58:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:58:26,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:58:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:26,851 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:58:26,851 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:58:26,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:58:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2020-10-27 01:58:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:58:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-27 01:58:26,866 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 22 [2020-10-27 01:58:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-27 01:58:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:58:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-27 01:58:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:58:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:26,868 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] [2020-10-27 01:58:26,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:58:26,869 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1227016610, now seen corresponding path program 2 times [2020-10-27 01:58:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:26,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515035008] [2020-10-27 01:58:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:28,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:58:28,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-27 01:58:28,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:58:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:28,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:28,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:28,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:28,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:28,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:28,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:58:28,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515035008] [2020-10-27 01:58:28,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:28,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:58:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550368879] [2020-10-27 01:58:28,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:28,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:28,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:28,593 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 6 states. [2020-10-27 01:58:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:28,853 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2020-10-27 01:58:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:58:28,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 01:58:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:28,856 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:58:28,856 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:58:28,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:58:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 96. [2020-10-27 01:58:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:58:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-10-27 01:58:28,873 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 29 [2020-10-27 01:58:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:28,873 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-10-27 01:58:28,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-10-27 01:58:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:58:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:28,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:28,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:58:28,879 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1847113090, now seen corresponding path program 3 times [2020-10-27 01:58:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528766148] [2020-10-27 01:58:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:31,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:58:31,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:31,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2977 [2020-10-27 01:58:31,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:31,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:58:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:58:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:31,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:31,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:32,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:32,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:58:32,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:58:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528766148] [2020-10-27 01:58:32,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:32,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:58:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117673423] [2020-10-27 01:58:32,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:58:32,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:58:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:32,029 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 7 states. [2020-10-27 01:58:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:32,374 INFO L93 Difference]: Finished difference Result 223 states and 304 transitions. [2020-10-27 01:58:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:32,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-27 01:58:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:32,378 INFO L225 Difference]: With dead ends: 223 [2020-10-27 01:58:32,379 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:58:32,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:58:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2020-10-27 01:58:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:58:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2020-10-27 01:58:32,412 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 36 [2020-10-27 01:58:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:32,412 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2020-10-27 01:58:32,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:58:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2020-10-27 01:58:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:58:32,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:32,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:32,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:58:32,418 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -561219042, now seen corresponding path program 4 times [2020-10-27 01:58:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:32,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353011226] [2020-10-27 01:58:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:58:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4592 [2020-10-27 01:58:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:58:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:58:37,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:37,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:37,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:37,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 01:58:37,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353011226] [2020-10-27 01:58:37,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:37,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:58:37,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749784405] [2020-10-27 01:58:37,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:58:37,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:58:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:37,179 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand 8 states. [2020-10-27 01:58:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:37,560 INFO L93 Difference]: Finished difference Result 267 states and 368 transitions. [2020-10-27 01:58:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:58:37,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-27 01:58:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:37,563 INFO L225 Difference]: With dead ends: 267 [2020-10-27 01:58:37,563 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:58:37,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:58:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2020-10-27 01:58:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:58:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2020-10-27 01:58:37,598 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 43 [2020-10-27 01:58:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:37,599 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2020-10-27 01:58:37,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:58:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2020-10-27 01:58:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:58:37,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:37,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:37,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:58:37,611 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1695943678, now seen corresponding path program 5 times [2020-10-27 01:58:37,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:37,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743869418] [2020-10-27 01:58:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:58:42,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:42,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:58:42,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:58:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:58:42,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:42,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:42,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:42,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:58:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743869418] [2020-10-27 01:58:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:42,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:58:42,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649953787] [2020-10-27 01:58:42,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:58:42,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:42,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:58:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:58:42,743 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand 9 states. [2020-10-27 01:58:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:43,131 INFO L93 Difference]: Finished difference Result 311 states and 432 transitions. [2020-10-27 01:58:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:58:43,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 01:58:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:43,134 INFO L225 Difference]: With dead ends: 311 [2020-10-27 01:58:43,134 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:58:43,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:58:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:58:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2020-10-27 01:58:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:58:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2020-10-27 01:58:43,149 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 225 transitions. Word has length 50 [2020-10-27 01:58:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:43,150 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 225 transitions. [2020-10-27 01:58:43,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:58:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 225 transitions. [2020-10-27 01:58:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:58:43,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:43,158 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:43,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:58:43,158 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1990895258, now seen corresponding path program 6 times [2020-10-27 01:58:43,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377935425] [2020-10-27 01:58:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:48,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:58:48,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:48,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:48,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:48,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 01:58:48,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377935425] [2020-10-27 01:58:48,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:48,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882125754] [2020-10-27 01:58:48,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:48,342 INFO L87 Difference]: Start difference. First operand 165 states and 225 transitions. Second operand 10 states. [2020-10-27 01:58:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:48,823 INFO L93 Difference]: Finished difference Result 355 states and 496 transitions. [2020-10-27 01:58:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:48,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 01:58:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:48,827 INFO L225 Difference]: With dead ends: 355 [2020-10-27 01:58:48,827 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 01:58:48,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 01:58:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2020-10-27 01:58:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 01:58:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 258 transitions. [2020-10-27 01:58:48,850 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 258 transitions. Word has length 57 [2020-10-27 01:58:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:48,850 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 258 transitions. [2020-10-27 01:58:48,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 258 transitions. [2020-10-27 01:58:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:58:48,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:48,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:48,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:58:48,854 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash -328351354, now seen corresponding path program 7 times [2020-10-27 01:58:48,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:48,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417328791] [2020-10-27 01:58:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:48,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:58:53,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:58:53,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:58:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:58:53,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:58:54,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 01:58:54,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417328791] [2020-10-27 01:58:54,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:54,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280484479] [2020-10-27 01:58:54,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:54,093 INFO L87 Difference]: Start difference. First operand 188 states and 258 transitions. Second operand 11 states. [2020-10-27 01:58:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:54,551 INFO L93 Difference]: Finished difference Result 399 states and 560 transitions. [2020-10-27 01:58:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:58:54,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-10-27 01:58:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:54,554 INFO L225 Difference]: With dead ends: 399 [2020-10-27 01:58:54,554 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 01:58:54,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 01:58:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 211. [2020-10-27 01:58:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 01:58:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 291 transitions. [2020-10-27 01:58:54,572 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 291 transitions. Word has length 64 [2020-10-27 01:58:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:54,572 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 291 transitions. [2020-10-27 01:58:54,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 291 transitions. [2020-10-27 01:58:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:58:54,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:54,578 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:54,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:58:54,578 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1345457942, now seen corresponding path program 8 times [2020-10-27 01:58:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:54,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750100251] [2020-10-27 01:58:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:59,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:58:59,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:59,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4894 [2020-10-27 01:58:59,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:58:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:58:59,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:59,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:59,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-27 01:58:59,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750100251] [2020-10-27 01:58:59,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:59,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:58:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008091180] [2020-10-27 01:58:59,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:58:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:59,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:58:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:58:59,669 INFO L87 Difference]: Start difference. First operand 211 states and 291 transitions. Second operand 12 states. [2020-10-27 01:59:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:00,290 INFO L93 Difference]: Finished difference Result 443 states and 624 transitions. [2020-10-27 01:59:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:59:00,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-27 01:59:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:00,293 INFO L225 Difference]: With dead ends: 443 [2020-10-27 01:59:00,294 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 01:59:00,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:59:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 01:59:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2020-10-27 01:59:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:59:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 324 transitions. [2020-10-27 01:59:00,317 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 324 transitions. Word has length 71 [2020-10-27 01:59:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:00,318 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 324 transitions. [2020-10-27 01:59:00,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:59:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 324 transitions. [2020-10-27 01:59:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:59:00,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:00,320 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:00,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:59:00,320 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1442974966, now seen corresponding path program 9 times [2020-10-27 01:59:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:00,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61751269] [2020-10-27 01:59:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:05,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:05,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:59:05,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:05,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:59:05,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:59:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:59:05,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:05,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:05,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:05,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:05,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-27 01:59:05,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61751269] [2020-10-27 01:59:05,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:59:05,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021213385] [2020-10-27 01:59:05,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:59:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:59:05,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:05,529 INFO L87 Difference]: Start difference. First operand 234 states and 324 transitions. Second operand 13 states. [2020-10-27 01:59:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:06,218 INFO L93 Difference]: Finished difference Result 487 states and 688 transitions. [2020-10-27 01:59:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:59:06,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-10-27 01:59:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:06,222 INFO L225 Difference]: With dead ends: 487 [2020-10-27 01:59:06,222 INFO L226 Difference]: Without dead ends: 278 [2020-10-27 01:59:06,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-27 01:59:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2020-10-27 01:59:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 01:59:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 357 transitions. [2020-10-27 01:59:06,240 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 357 transitions. Word has length 78 [2020-10-27 01:59:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:06,240 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 357 transitions. [2020-10-27 01:59:06,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:59:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 357 transitions. [2020-10-27 01:59:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:59:06,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:06,242 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:06,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:59:06,243 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 207057810, now seen corresponding path program 10 times [2020-10-27 01:59:06,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:06,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579258555] [2020-10-27 01:59:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:11,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:59:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:59:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:11,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:11,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:11,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:11,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:11,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:11,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-27 01:59:11,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579258555] [2020-10-27 01:59:11,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:11,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:59:11,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769583301] [2020-10-27 01:59:11,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:59:11,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:59:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:59:11,477 INFO L87 Difference]: Start difference. First operand 257 states and 357 transitions. Second operand 14 states. [2020-10-27 01:59:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:12,251 INFO L93 Difference]: Finished difference Result 531 states and 752 transitions. [2020-10-27 01:59:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:59:12,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-27 01:59:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:12,256 INFO L225 Difference]: With dead ends: 531 [2020-10-27 01:59:12,257 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 01:59:12,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:59:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 01:59:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 280. [2020-10-27 01:59:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-27 01:59:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 390 transitions. [2020-10-27 01:59:12,288 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 390 transitions. Word has length 85 [2020-10-27 01:59:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:12,289 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 390 transitions. [2020-10-27 01:59:12,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:59:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 390 transitions. [2020-10-27 01:59:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:59:12,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:12,301 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:12,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:59:12,302 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -962213746, now seen corresponding path program 11 times [2020-10-27 01:59:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:12,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415029095] [2020-10-27 01:59:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:12,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:17,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:59:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:17,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:17,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:17,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:17,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:17,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:17,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:17,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:17,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:17,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:17,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-27 01:59:17,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415029095] [2020-10-27 01:59:17,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:17,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:59:17,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372406464] [2020-10-27 01:59:17,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:59:17,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:59:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:59:17,543 INFO L87 Difference]: Start difference. First operand 280 states and 390 transitions. Second operand 15 states. [2020-10-27 01:59:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:18,270 INFO L93 Difference]: Finished difference Result 575 states and 816 transitions. [2020-10-27 01:59:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:59:18,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2020-10-27 01:59:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:18,274 INFO L225 Difference]: With dead ends: 575 [2020-10-27 01:59:18,274 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 01:59:18,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:59:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 01:59:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 303. [2020-10-27 01:59:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 01:59:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 423 transitions. [2020-10-27 01:59:18,291 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 423 transitions. Word has length 92 [2020-10-27 01:59:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:18,292 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 423 transitions. [2020-10-27 01:59:18,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:59:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 423 transitions. [2020-10-27 01:59:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:59:18,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:18,294 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:18,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:59:18,294 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1255117838, now seen corresponding path program 12 times [2020-10-27 01:59:18,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:18,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936689194] [2020-10-27 01:59:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:18,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:19,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:59:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:59:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:23,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:23,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:23,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-27 01:59:23,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936689194] [2020-10-27 01:59:23,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:23,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:59:23,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469845578] [2020-10-27 01:59:23,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:59:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:59:23,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:59:23,562 INFO L87 Difference]: Start difference. First operand 303 states and 423 transitions. Second operand 16 states. [2020-10-27 01:59:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:24,410 INFO L93 Difference]: Finished difference Result 619 states and 880 transitions. [2020-10-27 01:59:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:59:24,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-10-27 01:59:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:24,416 INFO L225 Difference]: With dead ends: 619 [2020-10-27 01:59:24,416 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 01:59:24,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:59:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 01:59:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 326. [2020-10-27 01:59:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-27 01:59:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 456 transitions. [2020-10-27 01:59:24,442 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 456 transitions. Word has length 99 [2020-10-27 01:59:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:24,442 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 456 transitions. [2020-10-27 01:59:24,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:59:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 456 transitions. [2020-10-27 01:59:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:59:24,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:24,445 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:24,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:59:24,445 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1760592402, now seen corresponding path program 13 times [2020-10-27 01:59:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:24,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245463773] [2020-10-27 01:59:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:24,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:29,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:59:29,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:29,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:59:29,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:29,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:59:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:59:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:29,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:29,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:29,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-10-27 01:59:29,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245463773] [2020-10-27 01:59:29,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:29,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:59:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994137432] [2020-10-27 01:59:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:59:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:59:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:59:29,736 INFO L87 Difference]: Start difference. First operand 326 states and 456 transitions. Second operand 17 states. [2020-10-27 01:59:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:30,518 INFO L93 Difference]: Finished difference Result 663 states and 944 transitions. [2020-10-27 01:59:30,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:59:30,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 106 [2020-10-27 01:59:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:30,522 INFO L225 Difference]: With dead ends: 663 [2020-10-27 01:59:30,522 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 01:59:30,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:59:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 01:59:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 349. [2020-10-27 01:59:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-27 01:59:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 489 transitions. [2020-10-27 01:59:30,547 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 489 transitions. Word has length 106 [2020-10-27 01:59:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:30,548 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 489 transitions. [2020-10-27 01:59:30,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:59:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 489 transitions. [2020-10-27 01:59:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:59:30,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:30,551 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:30,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:59:30,551 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1171206282, now seen corresponding path program 14 times [2020-10-27 01:59:30,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:30,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621698792] [2020-10-27 01:59:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:32,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:35,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:35,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 01:59:35,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:35,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:59:35,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:59:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:59:35,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:35,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:35,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-10-27 01:59:35,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621698792] [2020-10-27 01:59:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:35,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:59:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544204879] [2020-10-27 01:59:35,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:59:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:59:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:59:35,888 INFO L87 Difference]: Start difference. First operand 349 states and 489 transitions. Second operand 18 states. [2020-10-27 01:59:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:36,868 INFO L93 Difference]: Finished difference Result 707 states and 1008 transitions. [2020-10-27 01:59:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:59:36,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-10-27 01:59:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:36,872 INFO L225 Difference]: With dead ends: 707 [2020-10-27 01:59:36,872 INFO L226 Difference]: Without dead ends: 393 [2020-10-27 01:59:36,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:59:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-27 01:59:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 372. [2020-10-27 01:59:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-27 01:59:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 522 transitions. [2020-10-27 01:59:36,892 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 522 transitions. Word has length 113 [2020-10-27 01:59:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:36,892 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 522 transitions. [2020-10-27 01:59:36,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:59:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 522 transitions. [2020-10-27 01:59:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:59:36,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:36,895 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:36,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:59:36,895 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1323917206, now seen corresponding path program 15 times [2020-10-27 01:59:36,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:36,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307231428] [2020-10-27 01:59:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:59:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:42,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:42,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:42,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:42,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:42,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-10-27 01:59:42,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307231428] [2020-10-27 01:59:42,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:42,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:59:42,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272166824] [2020-10-27 01:59:42,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:59:42,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:59:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:59:42,238 INFO L87 Difference]: Start difference. First operand 372 states and 522 transitions. Second operand 19 states. [2020-10-27 01:59:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:43,105 INFO L93 Difference]: Finished difference Result 751 states and 1072 transitions. [2020-10-27 01:59:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:59:43,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 120 [2020-10-27 01:59:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:43,109 INFO L225 Difference]: With dead ends: 751 [2020-10-27 01:59:43,109 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 01:59:43,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:59:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 01:59:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 395. [2020-10-27 01:59:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-27 01:59:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2020-10-27 01:59:43,134 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 120 [2020-10-27 01:59:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:43,134 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2020-10-27 01:59:43,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:59:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2020-10-27 01:59:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 01:59:43,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:43,136 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:43,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:59:43,137 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1846216966, now seen corresponding path program 16 times [2020-10-27 01:59:43,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:43,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238392709] [2020-10-27 01:59:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:43,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:48,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:59:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:48,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:48,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:48,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:48,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:48,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-10-27 01:59:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238392709] [2020-10-27 01:59:48,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:48,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:59:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652578948] [2020-10-27 01:59:48,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:59:48,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:48,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:59:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:59:48,517 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand 20 states. [2020-10-27 01:59:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:49,520 INFO L93 Difference]: Finished difference Result 795 states and 1136 transitions. [2020-10-27 01:59:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:59:49,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 127 [2020-10-27 01:59:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:49,525 INFO L225 Difference]: With dead ends: 795 [2020-10-27 01:59:49,525 INFO L226 Difference]: Without dead ends: 439 [2020-10-27 01:59:49,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:59:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-27 01:59:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 418. [2020-10-27 01:59:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-27 01:59:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 588 transitions. [2020-10-27 01:59:49,548 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 588 transitions. Word has length 127 [2020-10-27 01:59:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:49,548 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 588 transitions. [2020-10-27 01:59:49,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:59:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 588 transitions. [2020-10-27 01:59:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 01:59:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:49,551 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:49,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:59:49,551 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash 840671514, now seen corresponding path program 17 times [2020-10-27 01:59:49,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:49,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021797222] [2020-10-27 01:59:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:49,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:59:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:59:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:54,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-10-27 01:59:54,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021797222] [2020-10-27 01:59:54,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:59:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986430788] [2020-10-27 01:59:54,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:59:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:59:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:59:54,955 INFO L87 Difference]: Start difference. First operand 418 states and 588 transitions. Second operand 21 states. [2020-10-27 01:59:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:56,018 INFO L93 Difference]: Finished difference Result 839 states and 1200 transitions. [2020-10-27 01:59:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:59:56,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 134 [2020-10-27 01:59:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:56,022 INFO L225 Difference]: With dead ends: 839 [2020-10-27 01:59:56,022 INFO L226 Difference]: Without dead ends: 462 [2020-10-27 01:59:56,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:59:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-27 01:59:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 441. [2020-10-27 01:59:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 01:59:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 621 transitions. [2020-10-27 01:59:56,043 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 621 transitions. Word has length 134 [2020-10-27 01:59:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:56,043 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 621 transitions. [2020-10-27 01:59:56,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:59:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 621 transitions. [2020-10-27 01:59:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 01:59:56,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:56,046 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:56,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:59:56,046 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 112713090, now seen corresponding path program 18 times [2020-10-27 01:59:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:56,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790546584] [2020-10-27 01:59:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:01,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 02:00:01,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:01,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:01,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:01,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-10-27 02:00:01,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790546584] [2020-10-27 02:00:01,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:01,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 02:00:01,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767743308] [2020-10-27 02:00:01,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 02:00:01,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 02:00:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 02:00:01,488 INFO L87 Difference]: Start difference. First operand 441 states and 621 transitions. Second operand 22 states. [2020-10-27 02:00:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:02,622 INFO L93 Difference]: Finished difference Result 883 states and 1264 transitions. [2020-10-27 02:00:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 02:00:02,623 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 141 [2020-10-27 02:00:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:02,627 INFO L225 Difference]: With dead ends: 883 [2020-10-27 02:00:02,627 INFO L226 Difference]: Without dead ends: 485 [2020-10-27 02:00:02,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 02:00:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-27 02:00:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 464. [2020-10-27 02:00:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-10-27 02:00:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 654 transitions. [2020-10-27 02:00:02,649 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 654 transitions. Word has length 141 [2020-10-27 02:00:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:02,649 INFO L481 AbstractCegarLoop]: Abstraction has 464 states and 654 transitions. [2020-10-27 02:00:02,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 02:00:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 654 transitions. [2020-10-27 02:00:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 02:00:02,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:02,653 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:02,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 02:00:02,653 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash 731023006, now seen corresponding path program 19 times [2020-10-27 02:00:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096547389] [2020-10-27 02:00:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:05,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:07,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 02:00:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:08,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:08,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:08,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:08,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:08,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:08,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:08,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-10-27 02:00:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096547389] [2020-10-27 02:00:08,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:08,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 02:00:08,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91201463] [2020-10-27 02:00:08,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 02:00:08,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 02:00:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 02:00:08,099 INFO L87 Difference]: Start difference. First operand 464 states and 654 transitions. Second operand 23 states. [2020-10-27 02:00:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:09,076 INFO L93 Difference]: Finished difference Result 927 states and 1328 transitions. [2020-10-27 02:00:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 02:00:09,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 148 [2020-10-27 02:00:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:09,081 INFO L225 Difference]: With dead ends: 927 [2020-10-27 02:00:09,081 INFO L226 Difference]: Without dead ends: 508 [2020-10-27 02:00:09,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 02:00:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-27 02:00:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 487. [2020-10-27 02:00:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-27 02:00:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 687 transitions. [2020-10-27 02:00:09,105 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 687 transitions. Word has length 148 [2020-10-27 02:00:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:09,106 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 687 transitions. [2020-10-27 02:00:09,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 02:00:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 687 transitions. [2020-10-27 02:00:09,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 02:00:09,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:09,109 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:09,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 02:00:09,109 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:09,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1047892482, now seen corresponding path program 20 times [2020-10-27 02:00:09,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:09,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828338873] [2020-10-27 02:00:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:09,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:14,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 02:00:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 02:00:14,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:14,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:14,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:14,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-10-27 02:00:14,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828338873] [2020-10-27 02:00:14,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:14,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 02:00:14,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449041146] [2020-10-27 02:00:14,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 02:00:14,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 02:00:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 02:00:14,641 INFO L87 Difference]: Start difference. First operand 487 states and 687 transitions. Second operand 24 states. [2020-10-27 02:00:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:16,013 INFO L93 Difference]: Finished difference Result 971 states and 1392 transitions. [2020-10-27 02:00:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 02:00:16,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 155 [2020-10-27 02:00:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:16,019 INFO L225 Difference]: With dead ends: 971 [2020-10-27 02:00:16,019 INFO L226 Difference]: Without dead ends: 531 [2020-10-27 02:00:16,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 02:00:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-27 02:00:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 510. [2020-10-27 02:00:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-27 02:00:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 720 transitions. [2020-10-27 02:00:16,041 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 720 transitions. Word has length 155 [2020-10-27 02:00:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:16,042 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 720 transitions. [2020-10-27 02:00:16,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 02:00:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 720 transitions. [2020-10-27 02:00:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 02:00:16,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:16,045 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:16,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 02:00:16,045 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:16,046 INFO L82 PathProgramCache]: Analyzing trace with hash 400117794, now seen corresponding path program 21 times [2020-10-27 02:00:16,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:16,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235207898] [2020-10-27 02:00:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:21,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 02:00:21,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:21,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:21,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:21,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:21,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-27 02:00:21,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235207898] [2020-10-27 02:00:21,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:21,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 02:00:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099119634] [2020-10-27 02:00:21,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 02:00:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 02:00:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 02:00:21,585 INFO L87 Difference]: Start difference. First operand 510 states and 720 transitions. Second operand 25 states. [2020-10-27 02:00:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:22,714 INFO L93 Difference]: Finished difference Result 1015 states and 1456 transitions. [2020-10-27 02:00:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 02:00:22,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 162 [2020-10-27 02:00:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:22,721 INFO L225 Difference]: With dead ends: 1015 [2020-10-27 02:00:22,721 INFO L226 Difference]: Without dead ends: 554 [2020-10-27 02:00:22,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 02:00:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-10-27 02:00:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 533. [2020-10-27 02:00:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-27 02:00:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 753 transitions. [2020-10-27 02:00:22,744 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 753 transitions. Word has length 162 [2020-10-27 02:00:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:22,745 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 753 transitions. [2020-10-27 02:00:22,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 02:00:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 753 transitions. [2020-10-27 02:00:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 02:00:22,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:22,748 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:22,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 02:00:22,749 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1521973882, now seen corresponding path program 22 times [2020-10-27 02:00:22,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:22,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341830169] [2020-10-27 02:00:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:22,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:26,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 02:00:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-10-27 02:00:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341830169] [2020-10-27 02:00:28,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:28,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 02:00:28,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645905081] [2020-10-27 02:00:28,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 02:00:28,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 02:00:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 02:00:28,290 INFO L87 Difference]: Start difference. First operand 533 states and 753 transitions. Second operand 26 states. [2020-10-27 02:00:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:29,785 INFO L93 Difference]: Finished difference Result 1059 states and 1520 transitions. [2020-10-27 02:00:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 02:00:29,786 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 169 [2020-10-27 02:00:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:29,789 INFO L225 Difference]: With dead ends: 1059 [2020-10-27 02:00:29,789 INFO L226 Difference]: Without dead ends: 577 [2020-10-27 02:00:29,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 02:00:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-10-27 02:00:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 556. [2020-10-27 02:00:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-27 02:00:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 786 transitions. [2020-10-27 02:00:29,814 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 786 transitions. Word has length 169 [2020-10-27 02:00:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:29,814 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 786 transitions. [2020-10-27 02:00:29,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 02:00:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 786 transitions. [2020-10-27 02:00:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 02:00:29,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:29,818 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:29,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 02:00:29,818 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash -84197978, now seen corresponding path program 23 times [2020-10-27 02:00:29,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:29,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270641941] [2020-10-27 02:00:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 02:00:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:35,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-27 02:00:35,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270641941] [2020-10-27 02:00:35,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:35,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 02:00:35,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647447941] [2020-10-27 02:00:35,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 02:00:35,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 02:00:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 02:00:35,397 INFO L87 Difference]: Start difference. First operand 556 states and 786 transitions. Second operand 27 states. [2020-10-27 02:00:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:37,041 INFO L93 Difference]: Finished difference Result 1103 states and 1584 transitions. [2020-10-27 02:00:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 02:00:37,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 176 [2020-10-27 02:00:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:37,045 INFO L225 Difference]: With dead ends: 1103 [2020-10-27 02:00:37,045 INFO L226 Difference]: Without dead ends: 600 [2020-10-27 02:00:37,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 02:00:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-10-27 02:00:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 579. [2020-10-27 02:00:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-27 02:00:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 819 transitions. [2020-10-27 02:00:37,095 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 819 transitions. Word has length 176 [2020-10-27 02:00:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:37,095 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 819 transitions. [2020-10-27 02:00:37,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 02:00:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 819 transitions. [2020-10-27 02:00:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 02:00:37,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:37,098 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:37,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 02:00:37,099 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash 888390390, now seen corresponding path program 24 times [2020-10-27 02:00:37,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:37,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056340021] [2020-10-27 02:00:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:37,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:42,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:42,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 02:00:42,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 02:00:42,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 02:00:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 02:00:42,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-27 02:00:42,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056340021] [2020-10-27 02:00:42,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:42,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 02:00:42,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480505309] [2020-10-27 02:00:42,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 02:00:42,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:42,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 02:00:42,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 02:00:42,857 INFO L87 Difference]: Start difference. First operand 579 states and 819 transitions. Second operand 28 states. [2020-10-27 02:00:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:44,630 INFO L93 Difference]: Finished difference Result 1147 states and 1648 transitions. [2020-10-27 02:00:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 02:00:44,631 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 183 [2020-10-27 02:00:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:44,634 INFO L225 Difference]: With dead ends: 1147 [2020-10-27 02:00:44,634 INFO L226 Difference]: Without dead ends: 623 [2020-10-27 02:00:44,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 02:00:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-27 02:00:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 602. [2020-10-27 02:00:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-27 02:00:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 852 transitions. [2020-10-27 02:00:44,657 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 852 transitions. Word has length 183 [2020-10-27 02:00:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:44,657 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 852 transitions. [2020-10-27 02:00:44,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 02:00:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 852 transitions. [2020-10-27 02:00:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 02:00:44,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:44,660 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 02:00:44,661 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1686343466, now seen corresponding path program 25 times [2020-10-27 02:00:44,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:44,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96080843] [2020-10-27 02:00:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:44,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:49,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:49,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 02:00:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:50,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:50,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:50,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:50,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:00:50,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-10-27 02:00:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96080843] [2020-10-27 02:00:50,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:50,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 02:00:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789960027] [2020-10-27 02:00:50,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 02:00:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 02:00:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 02:00:50,397 INFO L87 Difference]: Start difference. First operand 602 states and 852 transitions. Second operand 29 states. [2020-10-27 02:00:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:52,272 INFO L93 Difference]: Finished difference Result 1191 states and 1712 transitions. [2020-10-27 02:00:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 02:00:52,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 190 [2020-10-27 02:00:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:52,276 INFO L225 Difference]: With dead ends: 1191 [2020-10-27 02:00:52,277 INFO L226 Difference]: Without dead ends: 646 [2020-10-27 02:00:52,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 02:00:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-27 02:00:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-10-27 02:00:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-27 02:00:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 885 transitions. [2020-10-27 02:00:52,299 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 885 transitions. Word has length 190 [2020-10-27 02:00:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:52,299 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 885 transitions. [2020-10-27 02:00:52,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 02:00:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 885 transitions. [2020-10-27 02:00:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 02:00:52,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:52,302 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:52,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 02:00:52,303 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash -176945294, now seen corresponding path program 26 times [2020-10-27 02:00:52,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:52,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485881153] [2020-10-27 02:00:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:52,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:52,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:57,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 02:00:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 02:00:57,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 02:00:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 02:00:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:57,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:57,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:57,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2020-10-27 02:00:58,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485881153] [2020-10-27 02:00:58,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:58,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 02:00:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493323901] [2020-10-27 02:00:58,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 02:00:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 02:00:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 02:00:58,027 INFO L87 Difference]: Start difference. First operand 625 states and 885 transitions. Second operand 30 states. [2020-10-27 02:00:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:59,985 INFO L93 Difference]: Finished difference Result 1235 states and 1776 transitions. [2020-10-27 02:00:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 02:00:59,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 197 [2020-10-27 02:00:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:59,988 INFO L225 Difference]: With dead ends: 1235 [2020-10-27 02:00:59,988 INFO L226 Difference]: Without dead ends: 669 [2020-10-27 02:00:59,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 02:00:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-10-27 02:01:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 648. [2020-10-27 02:01:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-10-27 02:01:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 918 transitions. [2020-10-27 02:01:00,011 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 918 transitions. Word has length 197 [2020-10-27 02:01:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:00,011 INFO L481 AbstractCegarLoop]: Abstraction has 648 states and 918 transitions. [2020-10-27 02:01:00,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 02:01:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 918 transitions. [2020-10-27 02:01:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 02:01:00,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:00,015 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:00,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 02:01:00,015 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash -746748754, now seen corresponding path program 27 times [2020-10-27 02:01:00,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:00,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357032414] [2020-10-27 02:01:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:00,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:05,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 02:01:05,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:05,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:05,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:05,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-10-27 02:01:05,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357032414] [2020-10-27 02:01:05,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:05,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 02:01:05,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769138448] [2020-10-27 02:01:05,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 02:01:05,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:05,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 02:01:05,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 02:01:05,904 INFO L87 Difference]: Start difference. First operand 648 states and 918 transitions. Second operand 31 states. [2020-10-27 02:01:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:07,987 INFO L93 Difference]: Finished difference Result 1279 states and 1840 transitions. [2020-10-27 02:01:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 02:01:07,987 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 204 [2020-10-27 02:01:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:07,991 INFO L225 Difference]: With dead ends: 1279 [2020-10-27 02:01:07,992 INFO L226 Difference]: Without dead ends: 692 [2020-10-27 02:01:07,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 02:01:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-27 02:01:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 671. [2020-10-27 02:01:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2020-10-27 02:01:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 951 transitions. [2020-10-27 02:01:08,017 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 951 transitions. Word has length 204 [2020-10-27 02:01:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:08,017 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 951 transitions. [2020-10-27 02:01:08,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 02:01:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 951 transitions. [2020-10-27 02:01:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 02:01:08,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:08,021 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:08,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 02:01:08,021 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash 535627758, now seen corresponding path program 28 times [2020-10-27 02:01:08,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:08,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656460734] [2020-10-27 02:01:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:08,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:08,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 02:01:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 02:01:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:13,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:13,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2020-10-27 02:01:13,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656460734] [2020-10-27 02:01:13,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:13,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 02:01:13,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299970005] [2020-10-27 02:01:13,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 02:01:13,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 02:01:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 02:01:13,841 INFO L87 Difference]: Start difference. First operand 671 states and 951 transitions. Second operand 32 states. [2020-10-27 02:01:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:15,944 INFO L93 Difference]: Finished difference Result 1323 states and 1904 transitions. [2020-10-27 02:01:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 02:01:15,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 211 [2020-10-27 02:01:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:15,949 INFO L225 Difference]: With dead ends: 1323 [2020-10-27 02:01:15,949 INFO L226 Difference]: Without dead ends: 715 [2020-10-27 02:01:15,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 02:01:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-27 02:01:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 694. [2020-10-27 02:01:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-27 02:01:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 984 transitions. [2020-10-27 02:01:15,973 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 984 transitions. Word has length 211 [2020-10-27 02:01:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:15,974 INFO L481 AbstractCegarLoop]: Abstraction has 694 states and 984 transitions. [2020-10-27 02:01:15,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 02:01:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 984 transitions. [2020-10-27 02:01:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 02:01:15,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:15,977 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:15,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 02:01:15,977 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 443833906, now seen corresponding path program 29 times [2020-10-27 02:01:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908396857] [2020-10-27 02:01:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 02:01:21,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 02:01:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:21,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:21,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:21,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2020-10-27 02:01:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908396857] [2020-10-27 02:01:21,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:21,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 02:01:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491921604] [2020-10-27 02:01:21,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 02:01:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 02:01:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 02:01:21,790 INFO L87 Difference]: Start difference. First operand 694 states and 984 transitions. Second operand 33 states. [2020-10-27 02:01:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:24,073 INFO L93 Difference]: Finished difference Result 1367 states and 1968 transitions. [2020-10-27 02:01:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 02:01:24,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 218 [2020-10-27 02:01:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:24,077 INFO L225 Difference]: With dead ends: 1367 [2020-10-27 02:01:24,077 INFO L226 Difference]: Without dead ends: 738 [2020-10-27 02:01:24,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 02:01:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-27 02:01:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 717. [2020-10-27 02:01:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-27 02:01:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1017 transitions. [2020-10-27 02:01:24,107 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1017 transitions. Word has length 218 [2020-10-27 02:01:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:24,107 INFO L481 AbstractCegarLoop]: Abstraction has 717 states and 1017 transitions. [2020-10-27 02:01:24,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 02:01:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1017 transitions. [2020-10-27 02:01:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 02:01:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:24,114 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:24,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 02:01:24,115 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1298955158, now seen corresponding path program 30 times [2020-10-27 02:01:24,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:24,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169361012] [2020-10-27 02:01:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:29,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 02:01:29,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:30,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:30,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:30,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:30,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:30,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:30,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-27 02:01:30,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169361012] [2020-10-27 02:01:30,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:30,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 02:01:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104848090] [2020-10-27 02:01:30,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 02:01:30,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:30,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 02:01:30,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 02:01:30,084 INFO L87 Difference]: Start difference. First operand 717 states and 1017 transitions. Second operand 34 states. [2020-10-27 02:01:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:31,868 INFO L93 Difference]: Finished difference Result 1411 states and 2032 transitions. [2020-10-27 02:01:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 02:01:31,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 225 [2020-10-27 02:01:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:31,874 INFO L225 Difference]: With dead ends: 1411 [2020-10-27 02:01:31,874 INFO L226 Difference]: Without dead ends: 761 [2020-10-27 02:01:31,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 02:01:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-10-27 02:01:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 740. [2020-10-27 02:01:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-27 02:01:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1050 transitions. [2020-10-27 02:01:31,900 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1050 transitions. Word has length 225 [2020-10-27 02:01:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:31,900 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 1050 transitions. [2020-10-27 02:01:31,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 02:01:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1050 transitions. [2020-10-27 02:01:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 02:01:31,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:31,904 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:31,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 02:01:31,904 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1015850058, now seen corresponding path program 31 times [2020-10-27 02:01:31,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:31,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536978271] [2020-10-27 02:01:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 02:01:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:37,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:37,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2020-10-27 02:01:37,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536978271] [2020-10-27 02:01:37,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:37,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 02:01:37,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393813272] [2020-10-27 02:01:37,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 02:01:37,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 02:01:37,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 02:01:37,864 INFO L87 Difference]: Start difference. First operand 740 states and 1050 transitions. Second operand 35 states. [2020-10-27 02:01:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:39,717 INFO L93 Difference]: Finished difference Result 1455 states and 2096 transitions. [2020-10-27 02:01:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 02:01:39,718 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 232 [2020-10-27 02:01:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:39,721 INFO L225 Difference]: With dead ends: 1455 [2020-10-27 02:01:39,721 INFO L226 Difference]: Without dead ends: 784 [2020-10-27 02:01:39,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 02:01:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-27 02:01:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 763. [2020-10-27 02:01:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 763 states. [2020-10-27 02:01:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1083 transitions. [2020-10-27 02:01:39,750 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1083 transitions. Word has length 232 [2020-10-27 02:01:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:39,750 INFO L481 AbstractCegarLoop]: Abstraction has 763 states and 1083 transitions. [2020-10-27 02:01:39,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 02:01:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1083 transitions. [2020-10-27 02:01:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 02:01:39,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:39,755 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:39,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 02:01:39,755 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1038336794, now seen corresponding path program 32 times [2020-10-27 02:01:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:39,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396703627] [2020-10-27 02:01:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 02:01:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:45,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:45,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:45,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:45,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:01:45,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:45,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2020-10-27 02:01:45,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396703627] [2020-10-27 02:01:45,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:45,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 02:01:45,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254252801] [2020-10-27 02:01:45,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 02:01:45,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 02:01:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 02:01:45,758 INFO L87 Difference]: Start difference. First operand 763 states and 1083 transitions. Second operand 36 states. [2020-10-27 02:01:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:48,483 INFO L93 Difference]: Finished difference Result 1499 states and 2160 transitions. [2020-10-27 02:01:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 02:01:48,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 239 [2020-10-27 02:01:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:48,487 INFO L225 Difference]: With dead ends: 1499 [2020-10-27 02:01:48,487 INFO L226 Difference]: Without dead ends: 807 [2020-10-27 02:01:48,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 02:01:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-10-27 02:01:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 786. [2020-10-27 02:01:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-27 02:01:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1116 transitions. [2020-10-27 02:01:48,511 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1116 transitions. Word has length 239 [2020-10-27 02:01:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:48,512 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 1116 transitions. [2020-10-27 02:01:48,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 02:01:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1116 transitions. [2020-10-27 02:01:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 02:01:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:48,516 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:48,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 02:01:48,516 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1946533178, now seen corresponding path program 33 times [2020-10-27 02:01:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:48,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333922220] [2020-10-27 02:01:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 02:01:53,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:54,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:54,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:54,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:54,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:54,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:54,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2020-10-27 02:01:54,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333922220] [2020-10-27 02:01:54,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:54,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 02:01:54,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704111420] [2020-10-27 02:01:54,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 02:01:54,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 02:01:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 02:01:54,596 INFO L87 Difference]: Start difference. First operand 786 states and 1116 transitions. Second operand 37 states. [2020-10-27 02:01:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:56,707 INFO L93 Difference]: Finished difference Result 1543 states and 2224 transitions. [2020-10-27 02:01:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 02:01:56,708 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 246 [2020-10-27 02:01:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:56,712 INFO L225 Difference]: With dead ends: 1543 [2020-10-27 02:01:56,712 INFO L226 Difference]: Without dead ends: 830 [2020-10-27 02:01:56,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 02:01:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2020-10-27 02:01:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 809. [2020-10-27 02:01:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-27 02:01:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1149 transitions. [2020-10-27 02:01:56,737 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1149 transitions. Word has length 246 [2020-10-27 02:01:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:56,738 INFO L481 AbstractCegarLoop]: Abstraction has 809 states and 1149 transitions. [2020-10-27 02:01:56,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 02:01:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1149 transitions. [2020-10-27 02:01:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 02:01:56,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:56,742 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:56,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 02:01:56,743 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 364638562, now seen corresponding path program 34 times [2020-10-27 02:01:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:56,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735273777] [2020-10-27 02:01:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:56,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:56,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:01,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 02:02:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:02,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:02:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:02,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:02,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:02:02,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:02:02,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:02:02,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:02:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:02:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:02:02,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2020-10-27 02:02:02,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735273777] [2020-10-27 02:02:02,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:02:02,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 02:02:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373712267] [2020-10-27 02:02:02,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 02:02:02,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:02:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 02:02:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 02:02:02,910 INFO L87 Difference]: Start difference. First operand 809 states and 1149 transitions. Second operand 38 states. [2020-10-27 02:02:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:02:05,948 INFO L93 Difference]: Finished difference Result 1587 states and 2288 transitions. [2020-10-27 02:02:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 02:02:05,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 253 [2020-10-27 02:02:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:02:05,953 INFO L225 Difference]: With dead ends: 1587 [2020-10-27 02:02:05,953 INFO L226 Difference]: Without dead ends: 853 [2020-10-27 02:02:05,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 02:02:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-10-27 02:02:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 832. [2020-10-27 02:02:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-10-27 02:02:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1182 transitions. [2020-10-27 02:02:05,977 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1182 transitions. Word has length 253 [2020-10-27 02:02:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:02:05,977 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1182 transitions. [2020-10-27 02:02:05,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 02:02:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1182 transitions. [2020-10-27 02:02:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-27 02:02:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:02:05,981 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:02:05,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 02:02:05,982 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:02:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:02:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1362543294, now seen corresponding path program 35 times [2020-10-27 02:02:05,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:02:05,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625194241] [2020-10-27 02:02:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:02:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:06,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking...