/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:45:52,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:45:52,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:45:52,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:45:52,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:45:52,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:45:52,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:45:52,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:45:52,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:45:52,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:45:52,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:45:52,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:45:52,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:45:52,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:45:52,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:45:52,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:45:52,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:45:52,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:45:52,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:45:52,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:45:52,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:45:52,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:45:52,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:45:52,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:45:52,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:45:52,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:45:52,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:45:52,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:45:52,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:45:52,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:45:52,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:45:52,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:45:52,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:45:52,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:45:52,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:45:52,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:45:52,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:45:52,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:45:52,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:45:52,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:45:52,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:45:52,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:45:52,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:45:52,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:45:52,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:45:52,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:45:52,535 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:45:52,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:45:52,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:45:52,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:45:52,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:45:52,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:45:52,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:45:52,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:45:52,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:45:52,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:45:52,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:45:52,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:45:52,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:45:52,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:45:52,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:45:52,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:45:52,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:45:52,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:45:52,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:45:52,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:45:52,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:45:52,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:45:52,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:45:52,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:45:52,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:45:52,891 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:45:52,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i [2020-10-12 15:45:52,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22bfb505a/f013eda5ebae4fe882e78f4206862619/FLAGebb4a502b [2020-10-12 15:45:53,543 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:45:53,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i [2020-10-12 15:45:53,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22bfb505a/f013eda5ebae4fe882e78f4206862619/FLAGebb4a502b [2020-10-12 15:45:53,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22bfb505a/f013eda5ebae4fe882e78f4206862619 [2020-10-12 15:45:53,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:45:53,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:45:53,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:45:53,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:45:53,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:45:53,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:45:53" (1/1) ... [2020-10-12 15:45:53,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c03ede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:53, skipping insertion in model container [2020-10-12 15:45:53,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:45:53" (1/1) ... [2020-10-12 15:45:53,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:45:53,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:45:54,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:45:54,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:45:54,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:45:54,408 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:45:54,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54 WrapperNode [2020-10-12 15:45:54,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:45:54,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:45:54,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:45:54,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:45:54,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... [2020-10-12 15:45:54,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:45:54,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:45:54,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:45:54,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:45:54,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:45:54,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:45:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:45:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:45:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:45:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:45:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:45:54,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:45:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:45:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:45:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:45:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:45:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:45:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:45:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:45:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:45:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:45:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:45:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:45:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:45:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:45:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:45:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:45:54,575 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:45:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:45:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:45:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:45:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:45:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:45:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:45:54,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:45:54,892 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:45:55,095 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:45:55,096 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:45:55,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:45:55 BoogieIcfgContainer [2020-10-12 15:45:55,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:45:55,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:45:55,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:45:55,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:45:55,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:45:53" (1/3) ... [2020-10-12 15:45:55,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bd51d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:45:55, skipping insertion in model container [2020-10-12 15:45:55,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:54" (2/3) ... [2020-10-12 15:45:55,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bd51d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:45:55, skipping insertion in model container [2020-10-12 15:45:55,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:45:55" (3/3) ... [2020-10-12 15:45:55,108 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2020-10-12 15:45:55,118 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:45:55,126 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:45:55,140 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:45:55,165 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:45:55,165 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:45:55,166 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:45:55,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:45:55,169 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:45:55,169 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:45:55,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:45:55,170 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:45:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-12 15:45:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:45:55,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:55,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:55,197 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1586150655, now seen corresponding path program 1 times [2020-10-12 15:45:55,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:55,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404562094] [2020-10-12 15:45:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:55,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:55,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:45:55,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:55,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-12 15:45:55,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:45:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:55,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:45:55,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:45:56,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:56,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:56,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:56,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:45:56,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:56,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:56,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:45:56,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:56,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 15:45:56,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:45:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:45:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:45:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:56,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404562094] [2020-10-12 15:45:56,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:45:56,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:45:56,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151419123] [2020-10-12 15:45:56,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:45:56,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:45:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:45:56,192 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 7 states. [2020-10-12 15:45:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:56,553 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-10-12 15:45:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:45:56,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 15:45:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:56,564 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:45:56,564 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 15:45:56,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:45:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 15:45:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-12 15:45:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:45:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-12 15:45:56,621 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 20 [2020-10-12 15:45:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:56,621 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-12 15:45:56,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:45:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-12 15:45:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:45:56,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:56,623 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] [2020-10-12 15:45:56,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:45:56,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash -796979820, now seen corresponding path program 1 times [2020-10-12 15:45:56,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:56,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191199191] [2020-10-12 15:45:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:57,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:45:57,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:45:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-12 15:45:57,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:57,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:45:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:45:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:45:57,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:57,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:57,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:57,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:57,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:57,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:57,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:57,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:57,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:57,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:57,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:45:57,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:57,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 15:45:57,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:45:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:45:57,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:57,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191199191] [2020-10-12 15:45:57,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:45:57,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 15:45:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851758330] [2020-10-12 15:45:57,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:45:57,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:45:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:45:57,536 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 13 states. [2020-10-12 15:45:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:58,399 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-10-12 15:45:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:45:58,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 15:45:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:58,404 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:45:58,405 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:45:58,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:45:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-10-12 15:45:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 15:45:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-10-12 15:45:58,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 25 [2020-10-12 15:45:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:58,417 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-10-12 15:45:58,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:45:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-10-12 15:45:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:45:58,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:58,419 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] [2020-10-12 15:45:58,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:45:58,419 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:58,420 INFO L82 PathProgramCache]: Analyzing trace with hash -796981742, now seen corresponding path program 1 times [2020-10-12 15:45:58,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:58,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042721724] [2020-10-12 15:45:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:45:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:45:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:58,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:58,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:45:58,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:58,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 15:45:58,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:45:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:45:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:45:58,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:58,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042721724] [2020-10-12 15:45:58,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:58,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:45:58,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543308698] [2020-10-12 15:45:58,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:45:58,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:45:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:45:58,746 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 8 states. [2020-10-12 15:45:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:58,953 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2020-10-12 15:45:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:45:58,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 15:45:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:58,955 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:45:58,956 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:45:58,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:45:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:45:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-12 15:45:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:45:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-12 15:45:58,965 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2020-10-12 15:45:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:58,965 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-12 15:45:58,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:45:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-12 15:45:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:45:58,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:58,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:58,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:45:58,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -117519715, now seen corresponding path program 2 times [2020-10-12 15:45:58,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:58,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471816863] [2020-10-12 15:45:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:01,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:01,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:01,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2178 [2020-10-12 15:46:01,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:01,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:01,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:01,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:01,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:01,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:01,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:01,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:01,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:01,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-12 15:46:01,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:01,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471816863] [2020-10-12 15:46:01,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:01,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:01,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976332815] [2020-10-12 15:46:01,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:01,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:01,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:01,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:01,852 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 15 states. [2020-10-12 15:46:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:02,528 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-12 15:46:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:02,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 15:46:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:02,530 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:46:02,530 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 15:46:02,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 15:46:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-10-12 15:46:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 15:46:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-10-12 15:46:02,538 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 30 [2020-10-12 15:46:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:02,538 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-10-12 15:46:02,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-10-12 15:46:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:46:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:02,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:02,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:46:02,540 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -115670751, now seen corresponding path program 1 times [2020-10-12 15:46:02,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:02,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191912272] [2020-10-12 15:46:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:03,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:03,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:03,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:03,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:03,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:03,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:03,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:03,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:03,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:03,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:03,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:04,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191912272] [2020-10-12 15:46:04,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:04,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:46:04,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501813509] [2020-10-12 15:46:04,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:46:04,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:46:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:46:04,093 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 14 states. [2020-10-12 15:46:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:05,033 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-10-12 15:46:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:46:05,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 15:46:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:05,035 INFO L225 Difference]: With dead ends: 56 [2020-10-12 15:46:05,035 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:46:05,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:46:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-12 15:46:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:46:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-12 15:46:05,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 30 [2020-10-12 15:46:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:05,042 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-12 15:46:05,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:46:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-12 15:46:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:46:05,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:05,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:05,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:46:05,044 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -115672673, now seen corresponding path program 1 times [2020-10-12 15:46:05,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:05,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029002529] [2020-10-12 15:46:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:05,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:05,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:06,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:06,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:46:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-12 15:46:06,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:06,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:06,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:06,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:46:06,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:06,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:06,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:06,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:06,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:06,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:06,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:06,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:06,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:06,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:06,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:06,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:06,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:06,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:06,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:06,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:06,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-12 15:46:06,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:07,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029002529] [2020-10-12 15:46:07,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:07,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:07,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924756247] [2020-10-12 15:46:07,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:07,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:07,147 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 15 states. [2020-10-12 15:46:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:08,078 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-10-12 15:46:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:08,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 15:46:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:08,080 INFO L225 Difference]: With dead ends: 66 [2020-10-12 15:46:08,080 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:46:08,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:46:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-12 15:46:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:46:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-12 15:46:08,090 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2020-10-12 15:46:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:08,091 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-12 15:46:08,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-12 15:46:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:46:08,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:08,096 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] [2020-10-12 15:46:08,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:46:08,096 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash -354908755, now seen corresponding path program 1 times [2020-10-12 15:46:08,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:08,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095951635] [2020-10-12 15:46:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:08,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:12,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:46:12,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:46:12,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4224 [2020-10-12 15:46:12,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:12,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:12,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:12,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:12,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:12,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:12,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:12,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:12,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:12,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-12 15:46:12,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:12,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095951635] [2020-10-12 15:46:12,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:12,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:12,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82959617] [2020-10-12 15:46:12,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:12,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:12,758 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 15 states. [2020-10-12 15:46:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:13,620 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-10-12 15:46:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:13,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 15:46:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:13,622 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:46:13,622 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:46:13,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:46:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-12 15:46:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:46:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-12 15:46:13,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 31 [2020-10-12 15:46:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:13,630 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-12 15:46:13,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-12 15:46:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:46:13,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:13,631 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] [2020-10-12 15:46:13,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:46:13,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash -353061713, now seen corresponding path program 1 times [2020-10-12 15:46:13,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:13,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333998835] [2020-10-12 15:46:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:46:18,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:46:18,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4619 [2020-10-12 15:46:18,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:18,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:18,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:18,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:18,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:18,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:18,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:18,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:18,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:18,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:18,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:18,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-12 15:46:18,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:18,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:18,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:18,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:18,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333998835] [2020-10-12 15:46:18,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:18,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:18,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102469637] [2020-10-12 15:46:18,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:18,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:18,766 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 15 states. [2020-10-12 15:46:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:19,679 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-12 15:46:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:46:19,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 15:46:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:19,681 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:46:19,682 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:46:19,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:46:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:46:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-12 15:46:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 15:46:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-10-12 15:46:19,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2020-10-12 15:46:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:19,689 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-10-12 15:46:19,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-10-12 15:46:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:46:19,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:19,690 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] [2020-10-12 15:46:19,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:46:19,690 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash -353059791, now seen corresponding path program 1 times [2020-10-12 15:46:19,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:19,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775486429] [2020-10-12 15:46:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2367 [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:46:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:22,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:22,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:22,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775486429] [2020-10-12 15:46:22,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:22,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:46:22,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4562101] [2020-10-12 15:46:22,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:46:22,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:46:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:46:22,455 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 14 states. [2020-10-12 15:46:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:23,187 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-12 15:46:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:46:23,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 15:46:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:23,191 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:46:23,191 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:46:23,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:46:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-12 15:46:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:46:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-12 15:46:23,198 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2020-10-12 15:46:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:23,198 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-12 15:46:23,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:46:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-12 15:46:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:46:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:23,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:23,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:46:23,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 902884103, now seen corresponding path program 1 times [2020-10-12 15:46:23,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:23,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701988045] [2020-10-12 15:46:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:46:28,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:46:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:46:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:46:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:28,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:28,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:28,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:28,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:28,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:28,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:28,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:28,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:28,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 15:46:28,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:28,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:28,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701988045] [2020-10-12 15:46:28,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:28,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:28,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114727043] [2020-10-12 15:46:28,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:28,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:28,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:28,989 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 15 states. [2020-10-12 15:46:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:29,879 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-12 15:46:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:29,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 15:46:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:29,881 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:46:29,881 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:46:29,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:46:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-12 15:46:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:46:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-12 15:46:29,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 36 [2020-10-12 15:46:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:29,892 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-12 15:46:29,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-12 15:46:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:46:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:29,893 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-12 15:46:29,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:46:29,894 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1584939218, now seen corresponding path program 1 times [2020-10-12 15:46:29,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:29,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689124715] [2020-10-12 15:46:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:29,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-12 15:46:30,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:30,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:46:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:30,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:30,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:31,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:31,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-12 15:46:31,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:31,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:31,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:31,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:31,462 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 15:46:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:31,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689124715] [2020-10-12 15:46:31,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:31,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:46:31,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941226671] [2020-10-12 15:46:31,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:46:31,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:46:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:46:31,622 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 19 states. [2020-10-12 15:46:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:32,925 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-12 15:46:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:46:32,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-12 15:46:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:32,930 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:46:32,930 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 15:46:32,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:46:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 15:46:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2020-10-12 15:46:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:46:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-12 15:46:32,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 36 [2020-10-12 15:46:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:32,944 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-12 15:46:32,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:46:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-12 15:46:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:46:32,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:32,950 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:32,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:46:32,951 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1584937296, now seen corresponding path program 1 times [2020-10-12 15:46:32,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:32,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609701381] [2020-10-12 15:46:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:33,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:33,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:33,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:33,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:33,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:33,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:33,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:33,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:33,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:33,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:33,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:33,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:33,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:33,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:46:33,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:46:33,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609701381] [2020-10-12 15:46:33,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:33,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:46:33,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448235651] [2020-10-12 15:46:33,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:46:33,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:46:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:46:33,361 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 9 states. [2020-10-12 15:46:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:33,640 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2020-10-12 15:46:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:46:33,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-12 15:46:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:33,642 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:46:33,642 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:46:33,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:46:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:46:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-12 15:46:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:46:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-10-12 15:46:33,661 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 36 [2020-10-12 15:46:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:33,661 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-10-12 15:46:33,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:46:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-10-12 15:46:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:46:33,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:33,662 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:33,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:46:33,662 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1890238437, now seen corresponding path program 2 times [2020-10-12 15:46:33,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:33,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157471974] [2020-10-12 15:46:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:35,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:46:35,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:35,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-12 15:46:35,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:46:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:46:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:35,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:35,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:35,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:35,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:35,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:35,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:46:36,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-12 15:46:36,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:36,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:37,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157471974] [2020-10-12 15:46:37,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:37,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:37,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090974457] [2020-10-12 15:46:37,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:37,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:37,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:37,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:37,083 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 20 states. [2020-10-12 15:46:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:38,451 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-10-12 15:46:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:38,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-12 15:46:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:38,453 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:46:38,453 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:46:38,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:46:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-10-12 15:46:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:46:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-12 15:46:38,460 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 41 [2020-10-12 15:46:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:38,461 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-12 15:46:38,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-12 15:46:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:46:38,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:38,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:38,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:46:38,462 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1892087401, now seen corresponding path program 1 times [2020-10-12 15:46:38,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:38,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267931843] [2020-10-12 15:46:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:38,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:46:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:39,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:40,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:40,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:46:40,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:40,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-12 15:46:40,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:40,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:40,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:40,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:40,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:40,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267931843] [2020-10-12 15:46:40,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:40,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:46:40,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925036913] [2020-10-12 15:46:40,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:46:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:46:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:46:40,539 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 19 states. [2020-10-12 15:46:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:42,090 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-12 15:46:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:42,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-12 15:46:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:42,092 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:46:42,092 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 15:46:42,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 15:46:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-10-12 15:46:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:46:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-12 15:46:42,101 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 41 [2020-10-12 15:46:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:42,102 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-12 15:46:42,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:46:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-12 15:46:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:46:42,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:42,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:42,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:46:42,103 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1892085479, now seen corresponding path program 1 times [2020-10-12 15:46:42,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:42,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681843185] [2020-10-12 15:46:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:46:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:43,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:43,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:43,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:43,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:43,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:44,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681843185] [2020-10-12 15:46:44,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:44,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:44,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904141691] [2020-10-12 15:46:44,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:44,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:44,241 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 20 states. [2020-10-12 15:46:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:46,029 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-12 15:46:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:46,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-12 15:46:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:46,031 INFO L225 Difference]: With dead ends: 75 [2020-10-12 15:46:46,031 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:46:46,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:46:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:46:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2020-10-12 15:46:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:46:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-12 15:46:46,038 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 41 [2020-10-12 15:46:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:46,039 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-12 15:46:46,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-12 15:46:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:46:46,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:46,040 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:46,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:46:46,040 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1756051813, now seen corresponding path program 1 times [2020-10-12 15:46:46,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:46,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76786419] [2020-10-12 15:46:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:46,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:47,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:47,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:47,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4731 [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:50,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:46:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:46:50,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:50,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:50,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:50,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:51,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:51,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:51,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76786419] [2020-10-12 15:46:51,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:51,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:51,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571871917] [2020-10-12 15:46:51,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:51,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:51,661 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 20 states. [2020-10-12 15:46:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:53,362 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-12 15:46:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:53,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-12 15:46:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:53,363 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:46:53,363 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:46:53,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:46:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-12 15:46:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:46:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-12 15:46:53,373 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 42 [2020-10-12 15:46:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:53,374 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-12 15:46:53,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-12 15:46:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:46:53,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:53,375 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:53,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:46:53,376 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1757898855, now seen corresponding path program 1 times [2020-10-12 15:46:53,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:53,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28362503] [2020-10-12 15:46:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:53,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:57,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:46:57,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3908 [2020-10-12 15:46:57,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:46:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:57,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:57,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:57,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:57,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:57,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:46:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28362503] [2020-10-12 15:46:58,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:58,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:58,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21087354] [2020-10-12 15:46:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:58,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:58,206 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 20 states. [2020-10-12 15:46:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:59,719 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-12 15:46:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:59,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-12 15:46:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:59,721 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:46:59,721 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:46:59,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:46:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:46:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-12 15:46:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:46:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 15:46:59,727 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 42 [2020-10-12 15:46:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:59,728 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 15:46:59,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 15:46:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:46:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:59,729 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:59,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:46:59,729 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1757900777, now seen corresponding path program 1 times [2020-10-12 15:46:59,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034784365] [2020-10-12 15:46:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:47:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:02,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:02,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:02,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:02,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:02,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:02,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:02,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:02,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:02,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:02,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:03,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034784365] [2020-10-12 15:47:03,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:03,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:47:03,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549570946] [2020-10-12 15:47:03,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:47:03,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:47:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:47:03,248 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 19 states. [2020-10-12 15:47:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:04,948 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-12 15:47:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:47:04,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:47:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:04,950 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:47:04,950 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:47:04,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:47:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:47:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-12 15:47:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:47:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-12 15:47:04,956 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2020-10-12 15:47:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:04,957 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-12 15:47:04,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:47:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-12 15:47:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:47:04,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:04,958 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:47:04,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:47:04,958 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 951175759, now seen corresponding path program 1 times [2020-10-12 15:47:04,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:04,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790808963] [2020-10-12 15:47:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:04,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:08,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:09,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 15:47:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:47:09,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:10,286 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 15:47:10,494 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 15:47:10,641 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-12 15:47:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:11,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:11,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:11,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:12,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:12,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:12,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:47:12,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790808963] [2020-10-12 15:47:12,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:12,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:47:12,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268857490] [2020-10-12 15:47:12,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:47:12,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:47:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:47:12,590 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 20 states. [2020-10-12 15:47:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:14,386 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-12 15:47:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:14,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 15:47:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:14,388 INFO L225 Difference]: With dead ends: 99 [2020-10-12 15:47:14,388 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:47:14,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:47:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:47:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-10-12 15:47:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 15:47:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-12 15:47:14,397 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 47 [2020-10-12 15:47:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:14,398 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-12 15:47:14,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:47:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-12 15:47:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:47:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:14,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:14,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:47:14,399 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 953022801, now seen corresponding path program 1 times [2020-10-12 15:47:14,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:14,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87960484] [2020-10-12 15:47:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:15,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:17,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:17,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:19,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:19,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:47:19,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:47:19,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:47:19,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:47:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:47:19,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:20,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:47:20,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:20,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:20,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:20,520 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-12 15:47:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 15:47:20,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87960484] [2020-10-12 15:47:20,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:20,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:47:20,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362127318] [2020-10-12 15:47:20,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:47:20,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:47:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:47:20,913 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 20 states. [2020-10-12 15:47:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:23,685 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2020-10-12 15:47:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:47:23,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 15:47:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:23,687 INFO L225 Difference]: With dead ends: 137 [2020-10-12 15:47:23,687 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 15:47:23,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:47:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 15:47:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2020-10-12 15:47:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:47:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-12 15:47:23,697 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 47 [2020-10-12 15:47:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:23,697 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-12 15:47:23,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:47:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-12 15:47:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:47:23,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:23,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:23,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:47:23,699 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 953024723, now seen corresponding path program 1 times [2020-10-12 15:47:23,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:23,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243646032] [2020-10-12 15:47:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:23,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:25,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:25,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:28,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:28,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:47:28,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:29,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:29,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,652 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-12 15:47:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 15:47:29,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243646032] [2020-10-12 15:47:29,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:29,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:47:29,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854951634] [2020-10-12 15:47:29,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:47:29,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:47:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:47:29,922 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 17 states. [2020-10-12 15:47:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:31,825 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2020-10-12 15:47:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:31,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-12 15:47:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:31,828 INFO L225 Difference]: With dead ends: 137 [2020-10-12 15:47:31,828 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 15:47:31,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:47:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 15:47:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 103. [2020-10-12 15:47:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 15:47:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2020-10-12 15:47:31,837 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 47 [2020-10-12 15:47:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:31,838 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2020-10-12 15:47:31,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:47:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2020-10-12 15:47:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:47:31,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:31,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:31,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:47:31,839 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1633230874, now seen corresponding path program 2 times [2020-10-12 15:47:31,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:31,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698509160] [2020-10-12 15:47:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:31,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:33,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:47:33,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:47:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-12 15:47:33,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:47:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:33,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:47:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:47:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:33,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:33,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:33,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:33,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:33,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:33,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:47:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:34,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:34,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-12 15:47:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:47:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:35,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698509160] [2020-10-12 15:47:35,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:35,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:47:35,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030428182] [2020-10-12 15:47:35,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:47:35,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:47:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:47:35,692 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand 24 states. [2020-10-12 15:47:37,326 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-12 15:47:37,584 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:47:37,753 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 15:47:38,054 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-10-12 15:47:38,560 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-12 15:47:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:39,228 INFO L93 Difference]: Finished difference Result 137 states and 173 transitions. [2020-10-12 15:47:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:47:39,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-12 15:47:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:39,232 INFO L225 Difference]: With dead ends: 137 [2020-10-12 15:47:39,232 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 15:47:39,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:47:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 15:47:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-10-12 15:47:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 15:47:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-10-12 15:47:39,242 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 47 [2020-10-12 15:47:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:39,242 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-10-12 15:47:39,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:47:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-10-12 15:47:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:47:39,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:39,243 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-12 15:47:39,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:47:39,244 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:39,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1633228952, now seen corresponding path program 3 times [2020-10-12 15:47:39,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:39,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744171414] [2020-10-12 15:47:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:47:39,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:39,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-12 15:47:39,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:47:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:47:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:47:39,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:39,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:47:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:47:39,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 15:47:39,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:47:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:47:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:47:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:47:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 15:47:39,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744171414] [2020-10-12 15:47:39,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:39,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:47:39,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349025962] [2020-10-12 15:47:39,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:47:39,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:47:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:47:40,003 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 10 states. [2020-10-12 15:47:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:40,352 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2020-10-12 15:47:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:47:40,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-12 15:47:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:40,355 INFO L225 Difference]: With dead ends: 204 [2020-10-12 15:47:40,355 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 15:47:40,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:47:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 15:47:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-10-12 15:47:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 15:47:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2020-10-12 15:47:40,366 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 47 [2020-10-12 15:47:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:40,366 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2020-10-12 15:47:40,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:47:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2020-10-12 15:47:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:47:40,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:40,368 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:40,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:47:40,368 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash -757329181, now seen corresponding path program 4 times [2020-10-12 15:47:40,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:40,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521668581] [2020-10-12 15:47:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:40,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:41,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:42,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:45,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:45,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:47:45,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:47:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4620 [2020-10-12 15:47:45,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:47:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:47:45,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:45,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:45,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:45,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:45,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:45,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:45,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:46,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:46,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:47:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:47,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521668581] [2020-10-12 15:47:47,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:47,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:47:47,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594312281] [2020-10-12 15:47:47,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:47:47,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:47:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:47:47,222 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 25 states. [2020-10-12 15:47:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:50,138 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2020-10-12 15:47:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:50,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-12 15:47:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:50,143 INFO L225 Difference]: With dead ends: 174 [2020-10-12 15:47:50,143 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 15:47:50,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:47:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 15:47:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2020-10-12 15:47:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:47:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2020-10-12 15:47:50,152 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 52 [2020-10-12 15:47:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:50,153 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2020-10-12 15:47:50,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:47:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2020-10-12 15:47:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:47:50,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:50,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:50,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:47:50,154 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:50,154 INFO L82 PathProgramCache]: Analyzing trace with hash -755480217, now seen corresponding path program 2 times [2020-10-12 15:47:50,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:50,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920357920] [2020-10-12 15:47:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:53,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:53,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3142 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:47:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:53,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:53,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:53,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:54,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:47:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:47:54,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:55,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920357920] [2020-10-12 15:47:55,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:55,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:47:55,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981872881] [2020-10-12 15:47:55,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:47:55,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:47:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:47:55,488 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand 24 states. [2020-10-12 15:47:57,549 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 15:47:58,323 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-12 15:47:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:58,943 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2020-10-12 15:47:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:47:58,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-12 15:47:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:58,945 INFO L225 Difference]: With dead ends: 146 [2020-10-12 15:47:58,945 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 15:47:58,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:47:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 15:47:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2020-10-12 15:47:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 15:47:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2020-10-12 15:47:58,956 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 52 [2020-10-12 15:47:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:58,956 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2020-10-12 15:47:58,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:47:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2020-10-12 15:47:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:47:58,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:58,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:58,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:47:58,957 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash -755482139, now seen corresponding path program 2 times [2020-10-12 15:47:58,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:58,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394660848] [2020-10-12 15:47:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:59,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:00,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:02,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:02,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:48:02,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:48:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3853 [2020-10-12 15:48:02,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:48:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:48:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:48:02,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:02,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:02,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:02,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:02,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:02,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:02,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:02,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:03,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:04,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394660848] [2020-10-12 15:48:04,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:04,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:48:04,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874366169] [2020-10-12 15:48:04,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:48:04,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:48:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:48:04,637 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand 25 states. [2020-10-12 15:48:07,233 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-12 15:48:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:07,762 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2020-10-12 15:48:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:48:07,763 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-12 15:48:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:07,765 INFO L225 Difference]: With dead ends: 173 [2020-10-12 15:48:07,765 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 15:48:07,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:48:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 15:48:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2020-10-12 15:48:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 15:48:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2020-10-12 15:48:07,774 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 52 [2020-10-12 15:48:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:07,774 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2020-10-12 15:48:07,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:48:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2020-10-12 15:48:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:48:07,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:07,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-12 15:48:07,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:48:07,776 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1377342760, now seen corresponding path program 1 times [2020-10-12 15:48:07,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:07,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772165838] [2020-10-12 15:48:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:07,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:07,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:48:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:48:12,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:48:12,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:12,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:12,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:12,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:48:14,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772165838] [2020-10-12 15:48:14,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:14,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:48:14,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119674428] [2020-10-12 15:48:14,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:48:14,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:48:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:48:14,356 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 18 states. [2020-10-12 15:48:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:15,938 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2020-10-12 15:48:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:48:15,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-12 15:48:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:15,941 INFO L225 Difference]: With dead ends: 190 [2020-10-12 15:48:15,941 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 15:48:15,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:48:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 15:48:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-12 15:48:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:48:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-10-12 15:48:15,950 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 52 [2020-10-12 15:48:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:15,951 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-10-12 15:48:15,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:48:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-10-12 15:48:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:15,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:15,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-12 15:48:15,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:48:15,952 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1285834279, now seen corresponding path program 2 times [2020-10-12 15:48:15,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:15,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589678350] [2020-10-12 15:48:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:15,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:16,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:17,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:18,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:19,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:20,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:48:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:21,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:21,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:21,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:21,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:21,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:21,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:21,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:21,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:22,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:22,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:22,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-12 15:48:22,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:22,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:22,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589678350] [2020-10-12 15:48:22,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:22,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:48:22,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960426195] [2020-10-12 15:48:22,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:48:22,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:48:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:48:22,968 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 25 states. [2020-10-12 15:48:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:25,297 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-10-12 15:48:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:48:25,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-12 15:48:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:25,300 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:48:25,300 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:48:25,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:48:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:48:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-12 15:48:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:48:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-12 15:48:25,309 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 53 [2020-10-12 15:48:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-12 15:48:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:48:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-12 15:48:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:25,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:25,311 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-12 15:48:25,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:48:25,311 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1287681321, now seen corresponding path program 2 times [2020-10-12 15:48:25,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:25,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722879424] [2020-10-12 15:48:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:25,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:25,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:27,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:30,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:30,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:48:30,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:48:30,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:48:30,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:48:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:48:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:48:30,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:30,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:30,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:30,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:31,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:31,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:32,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722879424] [2020-10-12 15:48:32,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:32,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:48:32,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508071115] [2020-10-12 15:48:32,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:48:32,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:48:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:48:32,537 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 25 states. [2020-10-12 15:48:34,256 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 15:48:34,725 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-12 15:48:34,942 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:48:35,425 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-12 15:48:35,683 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-12 15:48:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:36,163 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2020-10-12 15:48:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:48:36,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-12 15:48:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:36,167 INFO L225 Difference]: With dead ends: 123 [2020-10-12 15:48:36,167 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 15:48:36,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:48:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 15:48:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-10-12 15:48:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:48:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-12 15:48:36,175 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 53 [2020-10-12 15:48:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:36,175 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-12 15:48:36,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:48:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-12 15:48:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:36,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:36,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-12 15:48:36,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:48:36,176 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1287683243, now seen corresponding path program 2 times [2020-10-12 15:48:36,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:36,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210728752] [2020-10-12 15:48:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:36,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:48:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:48:41,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:41,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:43,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210728752] [2020-10-12 15:48:43,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:43,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:48:43,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24876326] [2020-10-12 15:48:43,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:48:43,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:48:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:48:43,181 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 24 states. [2020-10-12 15:48:45,574 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-12 15:48:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:45,904 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-12 15:48:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:48:45,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-12 15:48:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:45,907 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:48:45,907 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:48:45,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:48:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:48:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-12 15:48:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:48:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-12 15:48:45,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 53 [2020-10-12 15:48:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:45,915 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-12 15:48:45,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:48:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-12 15:48:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:48:45,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:45,916 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-12 15:48:45,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:48:45,917 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1383307571, now seen corresponding path program 2 times [2020-10-12 15:48:45,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:45,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655434885] [2020-10-12 15:48:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:48:50,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:51,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:51,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:51,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:51,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:51,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:51,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:51,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-12 15:48:51,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:51,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:48:52,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655434885] [2020-10-12 15:48:52,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:52,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:48:52,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246094201] [2020-10-12 15:48:52,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:48:52,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:48:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:52,880 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 23 states. [2020-10-12 15:48:54,451 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-12 15:48:54,717 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-12 15:48:54,912 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 15:48:55,072 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 15:48:55,570 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-12 15:48:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:56,052 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2020-10-12 15:48:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:48:56,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-10-12 15:48:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:56,055 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:48:56,055 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 15:48:56,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:48:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 15:48:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-10-12 15:48:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 15:48:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2020-10-12 15:48:56,064 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 58 [2020-10-12 15:48:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:56,064 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2020-10-12 15:48:56,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:48:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2020-10-12 15:48:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:48:56,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:56,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:56,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:48:56,065 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1381460529, now seen corresponding path program 2 times [2020-10-12 15:48:56,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:56,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941270115] [2020-10-12 15:48:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:56,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:58,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:01,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:49:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:01,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:01,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:01,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:49:02,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-12 15:49:02,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:49:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:49:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:49:02,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941270115] [2020-10-12 15:49:02,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:02,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:49:02,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753469193] [2020-10-12 15:49:02,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:49:02,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:49:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:49:02,651 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 23 states. [2020-10-12 15:49:04,236 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-10-12 15:49:04,634 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2020-10-12 15:49:04,824 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:49:05,424 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-12 15:49:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:05,926 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2020-10-12 15:49:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:49:05,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-10-12 15:49:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:05,929 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:49:05,929 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 15:49:05,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:49:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 15:49:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-10-12 15:49:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 15:49:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2020-10-12 15:49:05,938 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 58 [2020-10-12 15:49:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:05,938 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2020-10-12 15:49:05,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:49:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2020-10-12 15:49:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:49:05,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:05,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:05,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:49:05,939 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1381458607, now seen corresponding path program 2 times [2020-10-12 15:49:05,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:05,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700649031] [2020-10-12 15:49:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:08,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:10,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:10,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:10,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:49:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:11,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:11,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:11,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:11,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:11,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:11,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:49:11,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:49:11,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:12,142 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-12 15:49:12,582 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-12 15:49:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:49:13,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700649031] [2020-10-12 15:49:13,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:13,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:49:13,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510783550] [2020-10-12 15:49:13,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:49:13,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:49:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:49:13,393 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 22 states. [2020-10-12 15:49:14,723 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-10-12 15:49:14,970 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2020-10-12 15:49:15,316 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-12 15:49:16,071 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 84 [2020-10-12 15:49:16,688 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 89 [2020-10-12 15:49:16,884 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 15:49:17,102 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-12 15:49:17,525 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 15:49:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:17,987 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2020-10-12 15:49:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:49:17,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-12 15:49:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:17,989 INFO L225 Difference]: With dead ends: 123 [2020-10-12 15:49:17,989 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 15:49:17,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:49:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 15:49:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2020-10-12 15:49:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:49:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-12 15:49:17,998 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 58 [2020-10-12 15:49:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:17,998 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-12 15:49:17,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:49:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-12 15:49:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:49:17,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:17,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:17,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:49:18,000 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash -701252456, now seen corresponding path program 3 times [2020-10-12 15:49:18,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:18,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325221854] [2020-10-12 15:49:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:20,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:20,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2035 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:49:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:20,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:20,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:20,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:20,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:20,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:20,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:20,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:21,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:21,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:49:21,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-12 15:49:21,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:49:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:49:21,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:21,903 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-12 15:49:22,302 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-12 15:49:22,507 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 15:49:22,966 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-12 15:49:23,158 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 15:49:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:23,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325221854] [2020-10-12 15:49:23,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:23,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:49:23,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996980657] [2020-10-12 15:49:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:49:23,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:49:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:49:23,477 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 29 states. [2020-10-12 15:49:24,958 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 15:49:25,745 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-12 15:49:26,108 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2020-10-12 15:49:26,341 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-12 15:49:26,970 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 86 [2020-10-12 15:49:27,414 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 121 [2020-10-12 15:49:27,692 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-12 15:49:28,180 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 146 [2020-10-12 15:49:28,846 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 99 [2020-10-12 15:49:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:29,504 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2020-10-12 15:49:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:49:29,505 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-12 15:49:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:29,506 INFO L225 Difference]: With dead ends: 121 [2020-10-12 15:49:29,506 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 15:49:29,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:49:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 15:49:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2020-10-12 15:49:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:49:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2020-10-12 15:49:29,515 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 58 [2020-10-12 15:49:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:29,516 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2020-10-12 15:49:29,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:49:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2020-10-12 15:49:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:49:29,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:29,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:29,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:49:29,517 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash -701254378, now seen corresponding path program 5 times [2020-10-12 15:49:29,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:29,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424845783] [2020-10-12 15:49:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:29,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:49:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:29,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:30,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:30,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:49:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:49:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:49:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 15:49:30,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424845783] [2020-10-12 15:49:30,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:30,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:49:30,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544281042] [2020-10-12 15:49:30,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:49:30,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:49:30,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:49:30,255 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 11 states. [2020-10-12 15:49:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:30,549 INFO L93 Difference]: Finished difference Result 178 states and 227 transitions. [2020-10-12 15:49:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:49:30,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 15:49:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:30,551 INFO L225 Difference]: With dead ends: 178 [2020-10-12 15:49:30,551 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:49:30,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:49:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:49:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-12 15:49:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 15:49:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2020-10-12 15:49:30,562 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 58 [2020-10-12 15:49:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:30,563 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2020-10-12 15:49:30,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:49:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2020-10-12 15:49:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:49:30,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:30,564 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:30,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:49:30,564 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2080108011, now seen corresponding path program 6 times [2020-10-12 15:49:30,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:30,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239684990] [2020-10-12 15:49:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:49:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:49:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:49:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:34,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:34,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:34,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:34,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:34,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:49:34,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:36,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:49:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:37,809 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-12 15:49:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:38,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239684990] [2020-10-12 15:49:38,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:38,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:49:38,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766975109] [2020-10-12 15:49:38,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:49:38,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:49:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:49:38,077 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand 30 states. [2020-10-12 15:49:40,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 15:49:40,654 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:49:40,824 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 15:49:41,318 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2020-10-12 15:49:41,597 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-12 15:49:41,799 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-12 15:49:42,084 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2020-10-12 15:49:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:42,805 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2020-10-12 15:49:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:42,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2020-10-12 15:49:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:42,809 INFO L225 Difference]: With dead ends: 159 [2020-10-12 15:49:42,809 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 15:49:42,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:49:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 15:49:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-12 15:49:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 15:49:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-12 15:49:42,818 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 63 [2020-10-12 15:49:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:42,818 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-12 15:49:42,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:49:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-12 15:49:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:49:42,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:42,819 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:42,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:49:42,819 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2081956975, now seen corresponding path program 3 times [2020-10-12 15:49:42,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:42,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273278807] [2020-10-12 15:49:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking...