/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=DEEPEST --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/list-simple/sll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:07:37,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:07:37,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:07:37,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:07:37,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:07:37,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:07:37,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:07:37,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:07:37,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:07:37,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:07:37,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:07:37,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:07:37,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:07:37,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:07:37,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:07:37,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:07:37,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:07:37,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:07:37,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:07:37,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:07:37,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:07:37,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:07:37,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:07:37,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:07:37,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:07:37,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:07:37,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:07:37,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:07:37,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:07:37,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:07:37,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:07:37,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:07:37,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:07:37,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:07:37,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:07:37,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:07:37,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:07:37,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:07:37,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:07:37,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:07:37,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:07:37,486 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 20:07:37,536 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:07:37,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:07:37,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:07:37,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:07:37,541 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:07:37,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:07:37,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:07:37,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:07:37,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:07:37,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:07:37,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:07:37,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:07:37,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:07:37,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:07:37,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:07:37,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:07:37,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:07:37,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:07:37,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:07:37,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:07:37,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:07:37,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:07:37,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:07:37,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:07:37,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:07:37,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:07:37,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:07:37,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:07:37,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:07:37,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:07:37,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:07:37,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:07:37,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:07:37,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:07:37,982 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:07:37,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-27 20:07:38,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4ef2eb6/a6d34d65c6e14709ad4ce237d15536e0/FLAGdb14d5dd7 [2020-10-27 20:07:38,689 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:07:38,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-27 20:07:38,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4ef2eb6/a6d34d65c6e14709ad4ce237d15536e0/FLAGdb14d5dd7 [2020-10-27 20:07:39,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be4ef2eb6/a6d34d65c6e14709ad4ce237d15536e0 [2020-10-27 20:07:39,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:07:39,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:07:39,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:07:39,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:07:39,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:07:39,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5981b3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39, skipping insertion in model container [2020-10-27 20:07:39,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:07:39,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:07:39,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:07:39,522 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:07:39,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:07:39,707 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:07:39,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39 WrapperNode [2020-10-27 20:07:39,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:07:39,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:07:39,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:07:39,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:07:39,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (1/1) ... [2020-10-27 20:07:39,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:07:39,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:07:39,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:07:39,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:07:39,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (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 20:07:39,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:07:39,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:07:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:07:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:07:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:07:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:07:39,928 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 20:07:39,929 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-27 20:07:39,929 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-27 20:07:39,929 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-27 20:07:39,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:07:39,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:07:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:07:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:07:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:07:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:07:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:07:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:07:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:07:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:07:39,935 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:07:39,935 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:07:39,935 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:07:39,935 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:07:39,935 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:07:39,936 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:07:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:07:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:07:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:07:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:07:39,937 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:07:39,938 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:07:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:07:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:07:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:07:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:07:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:07:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:07:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:07:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:07:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:07:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:07:39,941 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:07:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:07:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:07:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:07:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:07:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:07:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:07:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:07:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:07:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:07:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:07:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:07:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:07:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:07:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:07:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:07:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:07:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:07:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:07:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 20:07:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:07:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:07:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:07:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:07:40,484 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:07:40,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:07:40,655 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 20:07:40,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:07:40 BoogieIcfgContainer [2020-10-27 20:07:40,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:07:40,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:07:40,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:07:40,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:07:40,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:07:39" (1/3) ... [2020-10-27 20:07:40,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b73e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:07:40, skipping insertion in model container [2020-10-27 20:07:40,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:39" (2/3) ... [2020-10-27 20:07:40,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b73e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:07:40, skipping insertion in model container [2020-10-27 20:07:40,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:07:40" (3/3) ... [2020-10-27 20:07:40,666 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2020-10-27 20:07:40,680 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:07:40,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:07:40,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:07:40,726 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:07:40,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:07:40,727 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:07:40,727 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:07:40,727 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:07:40,727 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:07:40,727 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:07:40,727 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:07:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-27 20:07:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:07:40,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:40,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:40,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 871575057, now seen corresponding path program 1 times [2020-10-27 20:07:40,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:40,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452244075] [2020-10-27 20:07:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:40,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:41,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:41,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:07:41,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-27 20:07:41,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:07:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:07:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:07:41,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:07:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:41,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:41,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:41,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:41,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:07:41,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:41,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:41,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:41,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:41,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:41,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:41,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:41,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 20:07:41,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:07:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:07:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:41,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:07:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:41,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:41,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:07:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 20:07:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:07:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:41,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:41,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:07:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:41,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:41,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:41,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:41,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:07:41,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:41,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:41,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:41,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:41,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:07:41,734 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 20:07:41,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452244075] [2020-10-27 20:07:41,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:07:41,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:07:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987278890] [2020-10-27 20:07:41,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:07:41,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:07:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:07:41,771 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 7 states. [2020-10-27 20:07:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:42,184 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2020-10-27 20:07:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:07:42,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 20:07:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:42,196 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:07:42,196 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:07:42,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:07:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:07:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-27 20:07:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:07:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-27 20:07:42,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 31 [2020-10-27 20:07:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:42,250 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-27 20:07:42,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:07:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-27 20:07:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:07:42,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:42,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:42,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:07:42,254 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1746897243, now seen corresponding path program 1 times [2020-10-27 20:07:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252763353] [2020-10-27 20:07:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:42,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:42,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:07:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:07:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-27 20:07:46,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:07:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:07:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:07:46,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:07:46,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:46,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:46,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:46,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:46,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:07:46,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:46,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 20:07:46,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:07:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:46,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:07:46,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:07:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:46,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:46,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 20:07:46,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:07:46,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:46,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:07:46,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:46,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:07:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:46,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:07:46,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:46,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 20:07:46,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:07:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:07:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:07:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:46,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:07:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:46,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:46,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:46,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:46,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:07:46,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:07:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:07:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:07:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:07:47,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252763353] [2020-10-27 20:07:47,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:07:47,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:07:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605733207] [2020-10-27 20:07:47,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:07:47,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:07:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:07:47,105 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 18 states. [2020-10-27 20:07:48,026 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 20:07:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:48,220 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-27 20:07:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:07:48,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 20:07:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:48,222 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:07:48,222 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:07:48,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:07:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:07:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-27 20:07:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:07:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 20:07:48,233 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 40 [2020-10-27 20:07:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:48,234 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 20:07:48,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:07:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 20:07:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:07:48,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:48,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:48,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:07:48,236 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1645526376, now seen corresponding path program 1 times [2020-10-27 20:07:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:48,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445119798] [2020-10-27 20:07:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:48,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:48,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:49,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:53,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:07:53,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:07:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:53,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:53,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:53,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:53,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:07:53,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:53,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:53,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:53,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:07:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:07:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:53,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:07:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:53,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:53,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:07:53,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:53,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:07:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:53,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:07:53,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:53,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 20:07:53,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:07:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:07:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:54,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:07:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:54,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:54,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:54,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:54,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:54,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 20:07:54,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:54,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:07:54,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:54,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:54,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:07:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:07:54,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445119798] [2020-10-27 20:07:54,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:07:54,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 20:07:54,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269800598] [2020-10-27 20:07:54,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:07:54,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:07:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:07:54,225 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2020-10-27 20:07:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:55,115 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-27 20:07:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:07:55,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 20:07:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:55,120 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:07:55,120 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:07:55,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:07:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:07:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-27 20:07:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:07:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-27 20:07:55,141 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 43 [2020-10-27 20:07:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:55,141 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-27 20:07:55,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:07:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-27 20:07:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:07:55,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:55,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:55,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:07:55,147 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1572583676, now seen corresponding path program 1 times [2020-10-27 20:07:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:55,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323339087] [2020-10-27 20:07:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:55,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:55,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:57,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:00,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:00,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:08:00,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:00,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:08:00,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:00,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:08:00,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:00,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:08:00,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:00,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:00,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:00,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:00,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:00,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:00,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:00,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:00,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:00,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 20:08:00,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:08:00,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:00,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:00,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:00,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:00,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:00,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 20:08:00,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:00,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:00,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:00,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:08:00,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:01,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:01,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:01,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-27 20:08:01,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:08:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:02,696 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:08:02,918 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:08:06,427 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 252 DAG size of output: 168 [2020-10-27 20:08:06,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:06,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:06,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:06,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:06,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:06,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 20:08:06,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:06,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:06,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:06,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:06,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:07,097 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-27 20:08:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:08:07,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323339087] [2020-10-27 20:08:07,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:07,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:08:07,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930640218] [2020-10-27 20:08:07,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:08:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:08:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:08:07,151 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 23 states. [2020-10-27 20:08:08,742 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 20:08:10,710 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 20:08:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:13,324 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-10-27 20:08:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:08:13,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-27 20:08:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:13,326 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:08:13,326 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:08:13,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:08:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:08:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-10-27 20:08:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:08:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-27 20:08:13,347 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 45 [2020-10-27 20:08:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:13,348 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-27 20:08:13,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:08:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-27 20:08:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:08:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:13,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:13,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:08:13,351 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1500120291, now seen corresponding path program 1 times [2020-10-27 20:08:13,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:13,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50020775] [2020-10-27 20:08:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:08:18,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:08:18,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:18,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:18,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:08:18,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:18,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:18,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:08:18,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 20:08:18,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:08:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:08:18,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:19,129 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 52 [2020-10-27 20:08:19,546 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 78 [2020-10-27 20:08:19,817 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-10-27 20:08:19,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:19,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:08:19,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50020775] [2020-10-27 20:08:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:19,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:08:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702942329] [2020-10-27 20:08:19,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:08:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:08:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:08:19,885 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 14 states. [2020-10-27 20:08:20,610 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2020-10-27 20:08:20,839 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-10-27 20:08:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:21,156 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-10-27 20:08:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:08:21,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 20:08:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:21,161 INFO L225 Difference]: With dead ends: 91 [2020-10-27 20:08:21,161 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:08:21,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:08:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:08:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-27 20:08:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:08:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-10-27 20:08:21,178 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 45 [2020-10-27 20:08:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:21,178 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-10-27 20:08:21,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:08:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-10-27 20:08:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:08:21,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:21,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:21,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:08:21,181 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1558674867, now seen corresponding path program 1 times [2020-10-27 20:08:21,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:21,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355752215] [2020-10-27 20:08:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:21,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:21,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:21,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:21,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:08:26,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:26,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:08:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 20:08:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:08:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:26,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:26,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:26,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:26,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:26,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:26,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:26,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:26,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:26,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:08:26,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:26,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:26,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:26,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:08:26,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355752215] [2020-10-27 20:08:26,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:26,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:08:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210427930] [2020-10-27 20:08:26,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:08:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:08:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:08:26,373 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 7 states. [2020-10-27 20:08:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:26,627 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-27 20:08:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:08:26,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-27 20:08:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:26,634 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:08:26,634 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:08:26,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:08:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:08:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 20:08:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:08:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-27 20:08:26,660 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 46 [2020-10-27 20:08:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:26,660 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-27 20:08:26,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:08:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-27 20:08:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:08:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:26,667 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:26,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:08:26,668 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash -796173922, now seen corresponding path program 2 times [2020-10-27 20:08:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:26,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236318942] [2020-10-27 20:08:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:26,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:27,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:27,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:31,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:08:31,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:08:31,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:31,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:31,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:31,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:31,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:31,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:31,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:31,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:31,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:31,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:31,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:31,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:08:31,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:08:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:32,390 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-27 20:08:32,598 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-27 20:08:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:32,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:32,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:32,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:08:32,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236318942] [2020-10-27 20:08:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:08:32,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231631220] [2020-10-27 20:08:32,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:08:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:08:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:08:32,663 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 14 states. [2020-10-27 20:08:33,271 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-27 20:08:33,433 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-27 20:08:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:33,662 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-27 20:08:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:08:33,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 20:08:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:33,664 INFO L225 Difference]: With dead ends: 95 [2020-10-27 20:08:33,664 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:08:33,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:08:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:08:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-27 20:08:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:08:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-27 20:08:33,678 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 47 [2020-10-27 20:08:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:33,678 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-27 20:08:33,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:08:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-27 20:08:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:08:33,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:33,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:33,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:08:33,680 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 446471413, now seen corresponding path program 1 times [2020-10-27 20:08:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:33,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225724558] [2020-10-27 20:08:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:33,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:38,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:08:38,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:39,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:39,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:08:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:08:39,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:39,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 20:08:39,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:08:39,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:41,100 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2020-10-27 20:08:41,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:41,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:41,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:41,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:41,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 20:08:41,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:41,497 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 20:08:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:08:41,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225724558] [2020-10-27 20:08:41,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:41,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:08:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128123223] [2020-10-27 20:08:41,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:08:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:08:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:08:41,542 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 25 states. [2020-10-27 20:08:42,323 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 20:08:43,406 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 20:08:44,830 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 20:08:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:45,467 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-27 20:08:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:08:45,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-27 20:08:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:45,470 INFO L225 Difference]: With dead ends: 77 [2020-10-27 20:08:45,470 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:08:45,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:08:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:08:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-27 20:08:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:08:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-27 20:08:45,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 48 [2020-10-27 20:08:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:45,490 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-27 20:08:45,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:08:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-27 20:08:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:08:45,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:45,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:45,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:08:45,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash 902490748, now seen corresponding path program 1 times [2020-10-27 20:08:45,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:45,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728607469] [2020-10-27 20:08:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:46,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:46,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:08:50,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:08:50,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4551 [2020-10-27 20:08:50,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:08:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:08:50,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:08:50,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:50,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:50,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:50,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:08:50,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:50,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:08:50,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:08:50,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,261 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2020-10-27 20:08:51,853 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 73 [2020-10-27 20:08:52,156 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-27 20:08:52,456 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-27 20:08:52,676 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-27 20:08:52,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,370 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-27 20:08:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:08:53,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728607469] [2020-10-27 20:08:53,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:53,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:08:53,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067022208] [2020-10-27 20:08:53,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:08:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:08:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:08:53,398 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 25 states. [2020-10-27 20:08:54,671 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 20:08:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:55,506 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-10-27 20:08:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:08:55,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-27 20:08:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:55,510 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:08:55,510 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:08:55,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:08:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:08:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-27 20:08:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:08:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-27 20:08:55,545 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 49 [2020-10-27 20:08:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:55,545 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-27 20:08:55,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:08:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-27 20:08:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:08:55,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:55,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:55,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:08:55,550 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -869466984, now seen corresponding path program 2 times [2020-10-27 20:08:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:55,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272584476] [2020-10-27 20:08:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4417 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:08:59,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:09:00,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:09:00,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:00,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:09:00,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:09:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:09:00,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:09:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:00,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:09:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:09:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:01,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:01,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:01,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:09:01,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272584476] [2020-10-27 20:09:01,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:01,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:09:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278120060] [2020-10-27 20:09:01,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:09:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:09:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:09:01,532 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 23 states. [2020-10-27 20:09:02,546 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-27 20:09:02,939 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-27 20:09:03,272 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-27 20:09:03,642 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-27 20:09:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:03,999 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-27 20:09:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:09:03,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-27 20:09:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:04,001 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:09:04,001 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:09:04,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:09:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:09:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:09:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:09:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-27 20:09:04,014 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 54 [2020-10-27 20:09:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:04,015 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-27 20:09:04,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:09:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-27 20:09:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:09:04,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:04,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:04,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:09:04,019 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2086976505, now seen corresponding path program 1 times [2020-10-27 20:09:04,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:04,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962623878] [2020-10-27 20:09:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:09:04,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:04,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:04,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:09:04,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:04,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 20:09:04,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:09:04,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:09:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:09:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:09:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962623878] [2020-10-27 20:09:04,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:04,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:09:04,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786058519] [2020-10-27 20:09:04,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:09:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:09:04,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:09:04,548 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 12 states. [2020-10-27 20:09:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:04,997 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-10-27 20:09:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:09:04,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 20:09:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:04,999 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:09:04,999 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:09:05,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:09:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:09:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-27 20:09:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:09:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-27 20:09:05,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 50 [2020-10-27 20:09:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:05,011 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-27 20:09:05,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:09:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-27 20:09:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:09:05,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:05,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:05,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:09:05,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash -563254857, now seen corresponding path program 1 times [2020-10-27 20:09:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237597835] [2020-10-27 20:09:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:05,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:10,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:09:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:09:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:09:10,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:10,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:10,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:10,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:10,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:10,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:09:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,999 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 38 [2020-10-27 20:09:11,335 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 38 [2020-10-27 20:09:11,662 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 31 [2020-10-27 20:09:11,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:11,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:09:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:11,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:11,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:09:11,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237597835] [2020-10-27 20:09:11,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:11,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:09:11,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673194081] [2020-10-27 20:09:11,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:09:11,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:11,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:09:11,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:09:11,839 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 19 states. [2020-10-27 20:09:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:13,100 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-27 20:09:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:09:13,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-27 20:09:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:13,102 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:09:13,102 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:09:13,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:09:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:09:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2020-10-27 20:09:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:09:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-27 20:09:13,114 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 51 [2020-10-27 20:09:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:13,114 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-27 20:09:13,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:09:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-27 20:09:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:09:13,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:13,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:13,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:09:13,116 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1811364947, now seen corresponding path program 1 times [2020-10-27 20:09:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:13,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654700713] [2020-10-27 20:09:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:09:13,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:13,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:13,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:13,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:13,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:14,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:14,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:14,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:09:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:14,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:09:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:09:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:14,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:09:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:14,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:09:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:15,159 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 20:09:15,381 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-27 20:09:15,833 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-27 20:09:15,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:15,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:15,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:15,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:09:15,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:16,310 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 20:09:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:09:16,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654700713] [2020-10-27 20:09:16,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:16,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:09:16,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503754922] [2020-10-27 20:09:16,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:09:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:09:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:09:16,339 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 27 states. [2020-10-27 20:09:17,681 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 20:09:18,312 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 20:09:18,782 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2020-10-27 20:09:19,292 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-27 20:09:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:19,984 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-10-27 20:09:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:09:19,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-27 20:09:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:19,986 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:09:19,987 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:09:19,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:09:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:09:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-27 20:09:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:09:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-27 20:09:19,997 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 56 [2020-10-27 20:09:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:19,998 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-27 20:09:19,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:09:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-27 20:09:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:09:19,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:19,999 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:19,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:09:19,999 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash -395508174, now seen corresponding path program 2 times [2020-10-27 20:09:20,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:20,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069707152] [2020-10-27 20:09:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:09:25,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:09:25,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:25,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:25,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:25,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:09:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:09:25,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 20:09:25,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:09:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:09:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,870 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 20:09:26,086 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-27 20:09:27,134 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 116 [2020-10-27 20:09:28,521 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 244 DAG size of output: 167 [2020-10-27 20:09:29,767 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 219 DAG size of output: 159 [2020-10-27 20:09:29,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:09:29,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069707152] [2020-10-27 20:09:29,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:29,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:09:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754304132] [2020-10-27 20:09:29,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:09:29,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:09:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:09:29,871 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 19 states. [2020-10-27 20:09:30,968 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 20:09:31,849 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 158 [2020-10-27 20:09:32,980 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2020-10-27 20:09:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:33,619 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-27 20:09:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:09:33,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-27 20:09:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:33,622 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:09:33,622 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:09:33,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:09:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:09:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2020-10-27 20:09:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:09:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2020-10-27 20:09:33,636 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 53 [2020-10-27 20:09:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:33,636 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2020-10-27 20:09:33,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:09:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2020-10-27 20:09:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:09:33,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:33,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:09:33,638 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1110473038, now seen corresponding path program 2 times [2020-10-27 20:09:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:33,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5961936] [2020-10-27 20:09:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:33,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:09:34,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-27 20:09:34,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:09:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:09:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:09:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:34,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:34,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:09:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:34,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:09:34,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:35,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:09:35,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:35,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:09:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:09:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:35,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:09:35,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 20:09:35,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:09:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:35,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:09:35,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:35,970 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 20:09:36,135 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-27 20:09:36,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:09:36,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5961936] [2020-10-27 20:09:36,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:36,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:09:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874827919] [2020-10-27 20:09:36,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:09:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:09:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:09:36,637 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand 25 states. [2020-10-27 20:09:37,459 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 20:09:38,105 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 20:09:38,470 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 20:09:38,799 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-10-27 20:09:39,285 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-10-27 20:09:39,594 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-27 20:09:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:40,119 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-27 20:09:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:09:40,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 20:09:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:40,122 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:09:40,122 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:09:40,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:09:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:09:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-27 20:09:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:09:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-10-27 20:09:40,137 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 58 [2020-10-27 20:09:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:40,137 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-10-27 20:09:40,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:09:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-10-27 20:09:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:09:40,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:40,141 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:40,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:09:40,141 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:40,142 INFO L82 PathProgramCache]: Analyzing trace with hash 187527494, now seen corresponding path program 1 times [2020-10-27 20:09:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:40,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213204649] [2020-10-27 20:09:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:43,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:09:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:45,740 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-10-27 20:09:45,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:46,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:09:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:46,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:46,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:09:46,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:46,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:09:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:09:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:47,441 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 20:09:47,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:09:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:47,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:47,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:47,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:09:47,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 20:09:47,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:09:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:09:47,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:48,347 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 20:09:48,760 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-27 20:09:49,354 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-27 20:09:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:09:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:49,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:49,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:49,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 20:09:49,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:49,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:49,984 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-27 20:09:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:09:50,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213204649] [2020-10-27 20:09:50,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:09:50,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:09:50,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024042962] [2020-10-27 20:09:50,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:09:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:09:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:09:50,031 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 31 states. [2020-10-27 20:09:51,037 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 20:09:52,035 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-27 20:09:52,621 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-27 20:09:53,089 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-27 20:09:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:55,170 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2020-10-27 20:09:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:09:55,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2020-10-27 20:09:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:55,173 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:09:55,173 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 20:09:55,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:09:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 20:09:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-27 20:09:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 20:09:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2020-10-27 20:09:55,188 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 59 [2020-10-27 20:09:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:55,188 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2020-10-27 20:09:55,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:09:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2020-10-27 20:09:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:09:55,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:55,189 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:55,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:09:55,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1895264237, now seen corresponding path program 3 times [2020-10-27 20:09:55,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:55,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255611330] [2020-10-27 20:09:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:55,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:55,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:00,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:10:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:00,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:00,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:00,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:00,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:00,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:10:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:00,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:00,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:00,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:10:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:00,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:00,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:00,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:00,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:00,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:00,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:00,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:00,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:00,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:00,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:10:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:00,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:10:00,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:00,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:10:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:01,000 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-27 20:10:01,164 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 20:10:01,407 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-27 20:10:01,605 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-27 20:10:03,208 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 268 DAG size of output: 162 [2020-10-27 20:10:04,752 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 262 DAG size of output: 156 [2020-10-27 20:10:04,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:10:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:04,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:04,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:04,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:10:04,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255611330] [2020-10-27 20:10:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:10:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:10:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097139431] [2020-10-27 20:10:04,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:10:04,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:10:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:10:04,847 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 19 states. [2020-10-27 20:10:05,749 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 20:10:06,469 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 108 [2020-10-27 20:10:07,045 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 102 [2020-10-27 20:10:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:07,627 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-27 20:10:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:10:07,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-27 20:10:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:07,629 INFO L225 Difference]: With dead ends: 127 [2020-10-27 20:10:07,629 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 20:10:07,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:10:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 20:10:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2020-10-27 20:10:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:10:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-27 20:10:07,645 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 55 [2020-10-27 20:10:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:07,645 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-27 20:10:07,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:10:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-27 20:10:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:10:07,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:07,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:07,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:10:07,647 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1337379981, now seen corresponding path program 2 times [2020-10-27 20:10:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:07,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064293493] [2020-10-27 20:10:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:10,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:12,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:10:12,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:10:12,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 20:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:10:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:12,865 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-27 20:10:12,979 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-27 20:10:13,110 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-10-27 20:10:13,259 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-10-27 20:10:13,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:10:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:10:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:10:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:10:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:10:13,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 20:10:13,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:10:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:10:13,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:15,728 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 303 DAG size of output: 60 [2020-10-27 20:10:17,238 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 303 DAG size of output: 61 [2020-10-27 20:10:18,567 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 282 DAG size of output: 54 [2020-10-27 20:10:18,898 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-27 20:10:18,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:10:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:18,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:18,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:18,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:18,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 20:10:18,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064293493] [2020-10-27 20:10:18,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:10:18,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:10:18,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408792334] [2020-10-27 20:10:18,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:10:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:10:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:10:18,996 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 21 states. [2020-10-27 20:10:19,741 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-27 20:10:19,967 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 20:10:20,189 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 20:10:20,703 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 20:10:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:21,911 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-27 20:10:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:10:21,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2020-10-27 20:10:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:21,914 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:10:21,914 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:10:21,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:10:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:10:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2020-10-27 20:10:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:10:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-10-27 20:10:21,929 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 62 [2020-10-27 20:10:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:21,929 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-10-27 20:10:21,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:10:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-10-27 20:10:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:10:21,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:21,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:10:21,930 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash -720473030, now seen corresponding path program 3 times [2020-10-27 20:10:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:21,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25885808] [2020-10-27 20:10:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2968 [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:10:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:10:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 20:10:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:25,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:25,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:10:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:10:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 20:10:25,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:10:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:10:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:25,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:10:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:25,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:10:25,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:10:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:25,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:25,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:10:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:25,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:26,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:10:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:10:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:26,377 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-27 20:10:26,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:10:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:10:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:10:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:10:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:27,201 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 20:10:27,688 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-27 20:10:28,264 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-27 20:10:28,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:10:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 20:10:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:10:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:10:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:10:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,880 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-27 20:10:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:10:28,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25885808] [2020-10-27 20:10:28,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:10:28,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:10:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682743494] [2020-10-27 20:10:28,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:10:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:10:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:10:28,926 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 32 states. [2020-10-27 20:10:30,119 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-27 20:10:30,798 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 20:10:31,667 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-27 20:10:32,308 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-27 20:10:32,735 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-27 20:10:33,388 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-27 20:10:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:34,699 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2020-10-27 20:10:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:10:34,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2020-10-27 20:10:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:34,701 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:10:34,701 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:10:34,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:10:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:10:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-27 20:10:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:10:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-27 20:10:34,720 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 67 [2020-10-27 20:10:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:34,720 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-27 20:10:34,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:10:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-27 20:10:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:10:34,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:34,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:34,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:10:34,721 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1437672382, now seen corresponding path program 4 times [2020-10-27 20:10:34,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:34,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780338638] [2020-10-27 20:10:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:36,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:37,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:10:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:39,974 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-27 20:10:40,138 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-27 20:10:40,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:40,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:40,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:40,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:40,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:10:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:40,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:10:40,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:10:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:10:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:40,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:10:40,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:40,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:10:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:40,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:40,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:40,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:10:41,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:41,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:10:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:10:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:10:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:10:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:44,732 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 339 DAG size of output: 84 [2020-10-27 20:10:47,420 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 344 DAG size of output: 88 [2020-10-27 20:10:50,422 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 280 DAG size of output: 92 [2020-10-27 20:10:58,190 WARN L193 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 715 DAG size of output: 144 [2020-10-27 20:11:01,746 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 363 DAG size of output: 72 [2020-10-27 20:11:01,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:11:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:01,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:11:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:03,340 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 71 [2020-10-27 20:11:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:11:04,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780338638] [2020-10-27 20:11:04,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:04,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:11:04,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023309559] [2020-10-27 20:11:04,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:11:04,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:11:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:11:04,099 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2020-10-27 20:11:04,857 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 20:11:06,865 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 20:11:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:07,638 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-27 20:11:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:11:07,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-27 20:11:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:07,641 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:11:07,641 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 20:11:07,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=153, Invalid=1917, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:11:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 20:11:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-27 20:11:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:11:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-27 20:11:07,660 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 63 [2020-10-27 20:11:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:07,661 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-27 20:11:07,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:11:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-27 20:11:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:11:07,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:07,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:07,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:11:07,664 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -737225766, now seen corresponding path program 3 times [2020-10-27 20:11:07,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:07,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856578678] [2020-10-27 20:11:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:11:12,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:12,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:12,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:11:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:11:13,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:11:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:11:13,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:11:13,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:13,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:11:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:11:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:11:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:11:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:11:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:14,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:11:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:14,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:11:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:14,747 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 20:11:15,106 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-27 20:11:15,448 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:11:15,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:11:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:11:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:16,111 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-27 20:11:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:11:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856578678] [2020-10-27 20:11:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:11:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263789264] [2020-10-27 20:11:16,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:11:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:11:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:11:16,154 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 28 states. [2020-10-27 20:11:17,300 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-27 20:11:18,679 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-27 20:11:19,389 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-27 20:11:19,949 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 79 [2020-10-27 20:11:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:20,937 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-27 20:11:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:11:20,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-27 20:11:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:20,940 INFO L225 Difference]: With dead ends: 111 [2020-10-27 20:11:20,940 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:11:20,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:11:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:11:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-27 20:11:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:11:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-27 20:11:20,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 68 [2020-10-27 20:11:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:20,957 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-27 20:11:20,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:11:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-27 20:11:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:11:20,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:20,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:20,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:11:20,959 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1618752261, now seen corresponding path program 1 times [2020-10-27 20:11:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:20,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002732309] [2020-10-27 20:11:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:20,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:21,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking...