/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-simple/sll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:56:19,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:56:19,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:56:19,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:56:19,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:56:19,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:56:19,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:56:19,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:56:19,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:56:19,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:56:19,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:56:19,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:56:19,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:56:19,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:56:19,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:56:19,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:56:19,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:56:19,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:56:19,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:56:19,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:56:19,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:56:19,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:56:19,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:56:19,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:56:19,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:56:19,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:56:19,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:56:19,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:56:19,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:56:19,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:56:19,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:56:19,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:56:19,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:56:19,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:56:19,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:56:19,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:56:19,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:56:19,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:56:19,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:56:19,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:56:19,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:56:19,537 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 15:56:19,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:56:19,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:56:19,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:56:19,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:56:19,562 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:56:19,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:56:19,563 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:56:19,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:56:19,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:56:19,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:56:19,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:56:19,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:56:19,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:56:19,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:56:19,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:56:19,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:56:19,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:56:19,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:56:19,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:56:19,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:56:19,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:56:19,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:56:19,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:56:19,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:56:19,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:56:19,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:56:19,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:56:19,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:56:19,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:56:19,567 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 15:56:19,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:56:19,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:56:19,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:56:19,908 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:56:19,909 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:56:19,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-12 15:56:19,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90d9b6bb4/f1bc0c15da0d461e8e15439ebe92887e/FLAG5f6a6f2b4 [2020-10-12 15:56:20,545 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:56:20,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_unequal.i [2020-10-12 15:56:20,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90d9b6bb4/f1bc0c15da0d461e8e15439ebe92887e/FLAG5f6a6f2b4 [2020-10-12 15:56:20,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90d9b6bb4/f1bc0c15da0d461e8e15439ebe92887e [2020-10-12 15:56:20,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:56:20,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:56:20,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:56:20,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:56:20,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:56:20,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:56:20" (1/1) ... [2020-10-12 15:56:20,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cee2242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:20, skipping insertion in model container [2020-10-12 15:56:20,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:56:20" (1/1) ... [2020-10-12 15:56:20,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:56:20,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:56:21,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:56:21,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:56:21,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:56:21,615 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:56:21,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21 WrapperNode [2020-10-12 15:56:21,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:56:21,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:56:21,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:56:21,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:56:21,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (1/1) ... [2020-10-12 15:56:21,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:56:21,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:56:21,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:56:21,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:56:21,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (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 15:56:21,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:56:21,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:56:21,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:56:21,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-12 15:56:21,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:56:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:56:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:56:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:56:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:56:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:56:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:56:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:56:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:56:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:56:21,775 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:56:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:56:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:56:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:56:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:56:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:56:21,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:56:21,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:56:21,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:56:21,778 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:56:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:56:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:56:21,781 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:56:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:56:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:56:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:56:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:56:21,786 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-12 15:56:21,787 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:56:21,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:56:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:56:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:56:22,220 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:56:22,409 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:56:22,410 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 15:56:22,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:56:22 BoogieIcfgContainer [2020-10-12 15:56:22,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:56:22,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:56:22,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:56:22,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:56:22,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:56:20" (1/3) ... [2020-10-12 15:56:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383ea461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:56:22, skipping insertion in model container [2020-10-12 15:56:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:21" (2/3) ... [2020-10-12 15:56:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383ea461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:56:22, skipping insertion in model container [2020-10-12 15:56:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:56:22" (3/3) ... [2020-10-12 15:56:22,423 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2020-10-12 15:56:22,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:56:22,443 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:56:22,458 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:56:22,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:56:22,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:56:22,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:56:22,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:56:22,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:56:22,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:56:22,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:56:22,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:56:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-12 15:56:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:56:22,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:22,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:22,517 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1433043619, now seen corresponding path program 1 times [2020-10-12 15:56:22,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:22,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075156341] [2020-10-12 15:56:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:22,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:22,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:56:22,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:22,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 15:56:22,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:56:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:56:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:22,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:22,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:22,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:22,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:22,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:56:22,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:22,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:22,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:56:23,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 15:56:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:23,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 15:56:23,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:56:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:56:23,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,188 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 15:56:23,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075156341] [2020-10-12 15:56:23,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:23,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:56:23,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005733300] [2020-10-12 15:56:23,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:56:23,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:56:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:56:23,221 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-12 15:56:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:23,440 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2020-10-12 15:56:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 15:56:23,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 15:56:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:23,454 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:56:23,454 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:56:23,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:56:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:56:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-12 15:56:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:56:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-12 15:56:23,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 29 [2020-10-12 15:56:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:23,513 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-12 15:56:23,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:56:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-12 15:56:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:56:23,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:23,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:23,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:56:23,517 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash -257763685, now seen corresponding path program 1 times [2020-10-12 15:56:23,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:23,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917412029] [2020-10-12 15:56:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:56:23,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-12 15:56:23,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:23,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:23,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:56:23,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:56:23,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:56:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:23,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:56:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:56:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:23,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:56:23,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:23,849 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 15:56:23,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917412029] [2020-10-12 15:56:23,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:23,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:56:23,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945729151] [2020-10-12 15:56:23,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:56:23,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:56:23,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:56:23,854 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 7 states. [2020-10-12 15:56:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:24,147 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-12 15:56:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:56:24,148 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-12 15:56:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:24,149 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:56:24,149 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 15:56:24,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:56:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 15:56:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-12 15:56:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:56:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-12 15:56:24,161 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-12 15:56:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:24,161 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-12 15:56:24,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:56:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-12 15:56:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:56:24,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:24,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:24,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:56:24,164 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 58818396, now seen corresponding path program 1 times [2020-10-12 15:56:24,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:24,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3831870] [2020-10-12 15:56:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:24,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:24,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:24,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:56:28,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:56:28,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3840 [2020-10-12 15:56:28,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:56:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:56:28,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:56:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:28,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:28,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:56:28,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:28,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:28,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:28,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:56:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:28,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:28,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-12 15:56:28,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:28,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:28,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:28,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:28,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:28,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 15:56:28,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:28,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:28,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:28,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:28,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 15:56:28,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:56:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:28,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:29,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:29,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:29,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:29,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:29,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 15:56:29,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:29,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:29,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3831870] [2020-10-12 15:56:29,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:29,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:56:29,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521199912] [2020-10-12 15:56:29,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:56:29,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:56:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:56:29,493 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 18 states. [2020-10-12 15:56:30,526 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 15:56:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:30,670 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-12 15:56:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:56:30,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 15:56:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:30,673 INFO L225 Difference]: With dead ends: 56 [2020-10-12 15:56:30,673 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 15:56:30,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:56:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 15:56:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-12 15:56:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:56:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-12 15:56:30,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 38 [2020-10-12 15:56:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:30,683 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-12 15:56:30,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:56:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-12 15:56:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:56:30,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:30,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:30,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:56:30,685 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash 214262770, now seen corresponding path program 1 times [2020-10-12 15:56:30,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:30,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548434014] [2020-10-12 15:56:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:30,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:35,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:35,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:56:35,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:56:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:56:35,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:56:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:35,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:56:35,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:35,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:35,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:35,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:35,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:35,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:56:35,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:35,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:35,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:35,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:35,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:35,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:35,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 15:56:35,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:56:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:35,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:35,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:35,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:35,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:35,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:56:35,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:36,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:36,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:36,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:36,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:36,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:36,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 15:56:36,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:56:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:56:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:36,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:36,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:36,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:36,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 15:56:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:56:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:36,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:36,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548434014] [2020-10-12 15:56:36,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:36,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:56:36,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025678182] [2020-10-12 15:56:36,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:56:36,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:56:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:56:36,713 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 21 states. [2020-10-12 15:56:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:37,558 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-12 15:56:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:56:37,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-12 15:56:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:37,561 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:56:37,561 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:56:37,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:56:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:56:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-12 15:56:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:56:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-12 15:56:37,573 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 41 [2020-10-12 15:56:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:37,573 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-12 15:56:37,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:56:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-12 15:56:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:56:37,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:37,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:37,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:56:37,576 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1167342643, now seen corresponding path program 1 times [2020-10-12 15:56:37,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:37,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138814283] [2020-10-12 15:56:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:37,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:40,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:42,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:42,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:56:42,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:56:42,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:56:42,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:42,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:56:42,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:42,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:56:42,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:42,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:42,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:42,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:42,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:42,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:42,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:42,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:42,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:42,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:42,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:42,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:42,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:42,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 15:56:42,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:42,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:42,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:42,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:42,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:42,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:56:42,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:42,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:42,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:42,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:43,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:43,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:56:43,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-12 15:56:43,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:56:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:56:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:44,001 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-12 15:56:44,318 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-12 15:56:44,646 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:56:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:44,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:44,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:44,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:44,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:56:44,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:45,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138814283] [2020-10-12 15:56:45,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:45,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:56:45,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514433773] [2020-10-12 15:56:45,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:56:45,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:56:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:56:45,018 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 24 states. [2020-10-12 15:56:46,493 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 15:56:46,886 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-12 15:56:47,547 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-12 15:56:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:47,940 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-12 15:56:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:56:47,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2020-10-12 15:56:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:47,942 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:56:47,944 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:56:47,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:56:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:56:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2020-10-12 15:56:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:56:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-12 15:56:47,960 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 43 [2020-10-12 15:56:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:47,960 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-12 15:56:47,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:56:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-12 15:56:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:56:47,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:47,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:47,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:56:47,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -276686290, now seen corresponding path program 1 times [2020-10-12 15:56:47,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:47,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737125070] [2020-10-12 15:56:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:48,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:48,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:52,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:52,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:56:52,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:56:52,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:56:52,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:56:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:56:52,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:53,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:53,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:53,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:53,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:53,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:56:53,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:53,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:53,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:53,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:53,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:53,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:53,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:53,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 15:56:53,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:56:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:56:53,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:53,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:53,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:53,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:53,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:53,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:56:53,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:56:53,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:53,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:53,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:53,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:53,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:53,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:56:53,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:53,740 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 15:56:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:53,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:53,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:54,239 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-12 15:56:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:54,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737125070] [2020-10-12 15:56:54,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:54,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:56:54,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922609694] [2020-10-12 15:56:54,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:56:54,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:56:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:56:54,263 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 22 states. [2020-10-12 15:56:55,616 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 15:56:55,941 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-10-12 15:56:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:56,388 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-12 15:56:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:56:56,389 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-12 15:56:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:56,391 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:56:56,391 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:56:56,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:56:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:56:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2020-10-12 15:56:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:56:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-12 15:56:56,404 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 43 [2020-10-12 15:56:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:56,404 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-12 15:56:56,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:56:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-12 15:56:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:56:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:56,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:56,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:56:56,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 12605476, now seen corresponding path program 1 times [2020-10-12 15:56:56,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:56,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591826346] [2020-10-12 15:56:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:57,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:57:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:57:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:01,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:01,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:01,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:01,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:01,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:01,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:01,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:01,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:01,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:01,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:01,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:57:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:01,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:01,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:57:01,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:02,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:57:02,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:02,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591826346] [2020-10-12 15:57:02,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:02,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:57:02,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434366152] [2020-10-12 15:57:02,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:57:02,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:57:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:57:02,371 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 22 states. [2020-10-12 15:57:03,255 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-12 15:57:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:03,596 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-12 15:57:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:57:03,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-12 15:57:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:03,598 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:57:03,598 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:57:03,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:57:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:57:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-10-12 15:57:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:57:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-12 15:57:03,608 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 44 [2020-10-12 15:57:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:03,609 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-12 15:57:03,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:57:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-12 15:57:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:03,610 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:03,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:57:03,611 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1745250072, now seen corresponding path program 2 times [2020-10-12 15:57:03,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:03,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478576341] [2020-10-12 15:57:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:03,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:07,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:57:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3743 [2020-10-12 15:57:07,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:57:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:57:07,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:07,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:57:07,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:57:07,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:57:07,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 15:57:07,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:57:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:07,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:57:07,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:08,306 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:57:08,516 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-12 15:57:08,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:08,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:08,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:08,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:08,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:08,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:57:08,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:57:08,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478576341] [2020-10-12 15:57:08,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:08,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:57:08,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521314635] [2020-10-12 15:57:08,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:57:08,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:57:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:57:08,792 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 24 states. [2020-10-12 15:57:10,196 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-10-12 15:57:10,443 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2020-10-12 15:57:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:10,743 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-12 15:57:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:57:10,744 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-12 15:57:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:10,746 INFO L225 Difference]: With dead ends: 72 [2020-10-12 15:57:10,746 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:57:10,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:57:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:57:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-12 15:57:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:57:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-12 15:57:10,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 45 [2020-10-12 15:57:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:10,756 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-12 15:57:10,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:57:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-12 15:57:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:10,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:10,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:57:10,758 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash -854593719, now seen corresponding path program 1 times [2020-10-12 15:57:10,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:10,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168545131] [2020-10-12 15:57:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:11,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:15,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:15,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:15,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:57:15,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:15,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:15,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:15,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:15,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:15,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:57:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:57:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:16,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:57:16,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:16,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:16,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:57:16,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:16,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:16,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:16,635 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-12 15:57:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:16,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:16,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:16,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:16,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:16,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:57:16,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:16,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:16,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:16,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:16,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:17,338 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-12 15:57:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:17,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168545131] [2020-10-12 15:57:17,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:17,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:57:17,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014321371] [2020-10-12 15:57:17,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:57:17,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:57:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:57:17,360 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 23 states. [2020-10-12 15:57:18,740 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 15:57:19,103 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-12 15:57:19,384 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-12 15:57:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:19,931 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-12 15:57:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:57:19,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-12 15:57:19,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:19,934 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:57:19,934 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 15:57:19,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:57:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 15:57:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2020-10-12 15:57:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:57:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-12 15:57:19,947 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 45 [2020-10-12 15:57:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:19,948 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-12 15:57:19,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:57:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-12 15:57:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:57:19,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:19,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:19,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:57:19,950 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash -722655639, now seen corresponding path program 1 times [2020-10-12 15:57:19,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:19,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035302213] [2020-10-12 15:57:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:21,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:22,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:23,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:24,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:24,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:57:24,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:57:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:57:24,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:24,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:57:24,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:24,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:57:24,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:25,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:25,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:25,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:25,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:25,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:57:25,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:57:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:25,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:26,474 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-10-12 15:57:26,890 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-12 15:57:27,301 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 94 [2020-10-12 15:57:28,307 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 93 [2020-10-12 15:57:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:28,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:28,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:28,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035302213] [2020-10-12 15:57:28,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:28,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:57:28,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799719467] [2020-10-12 15:57:28,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:57:28,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:57:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:57:28,627 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 25 states. [2020-10-12 15:57:30,217 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 15:57:30,765 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 97 [2020-10-12 15:57:31,609 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 115 [2020-10-12 15:57:31,959 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 57 [2020-10-12 15:57:32,347 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 90 [2020-10-12 15:57:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:32,897 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2020-10-12 15:57:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:57:32,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-12 15:57:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:32,900 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:57:32,900 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:57:32,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=163, Invalid=1559, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:57:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:57:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-10-12 15:57:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:57:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-12 15:57:32,913 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 46 [2020-10-12 15:57:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:32,914 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-12 15:57:32,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:57:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-12 15:57:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:57:32,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:32,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:32,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:57:32,916 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -718003412, now seen corresponding path program 1 times [2020-10-12 15:57:32,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:32,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298255090] [2020-10-12 15:57:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:33,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:37,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:37,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:57:37,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:57:37,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:38,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:38,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:57:38,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:38,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-12 15:57:38,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:38,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:57:38,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:38,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:57:38,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:38,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:57:38,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:39,287 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-12 15:57:39,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:39,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:39,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:39,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:57:39,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:57:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:39,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298255090] [2020-10-12 15:57:39,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:39,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:57:39,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966628921] [2020-10-12 15:57:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:57:39,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:57:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:57:39,549 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 24 states. [2020-10-12 15:57:40,579 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-12 15:57:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:41,257 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-12 15:57:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:57:41,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-12 15:57:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:41,262 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:57:41,262 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:57:41,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:57:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:57:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-12 15:57:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:57:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-12 15:57:41,276 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 46 [2020-10-12 15:57:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:41,277 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-12 15:57:41,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:57:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-12 15:57:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:57:41,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:41,278 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:41,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:57:41,279 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2122115492, now seen corresponding path program 2 times [2020-10-12 15:57:41,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:41,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944921020] [2020-10-12 15:57:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:41,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:41,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:46,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:57:46,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:57:46,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:57:46,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:46,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:57:46,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:46,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:57:46,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:46,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:46,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:46,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:57:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:57:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:46,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:46,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:57:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:46,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:46,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:47,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:47,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:57:47,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:57:47,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-12 15:57:47,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:57:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:57:47,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:47,817 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 15:57:48,038 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:57:48,302 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-12 15:57:48,609 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-12 15:57:48,933 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-12 15:57:49,916 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 146 [2020-10-12 15:57:49,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:49,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:57:49,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:51,030 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-10-12 15:57:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:51,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944921020] [2020-10-12 15:57:51,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:51,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:57:51,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472923150] [2020-10-12 15:57:51,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:57:51,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:57:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:57:51,113 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 27 states. [2020-10-12 15:57:53,053 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 15:57:53,879 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-12 15:57:54,511 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-12 15:57:55,052 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-12 15:57:55,623 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2020-10-12 15:57:56,325 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 98 [2020-10-12 15:57:56,844 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-12 15:57:57,555 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 97 [2020-10-12 15:57:58,194 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 86 [2020-10-12 15:57:58,788 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2020-10-12 15:57:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:59,567 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-12 15:57:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:57:59,567 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2020-10-12 15:57:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:59,568 INFO L225 Difference]: With dead ends: 110 [2020-10-12 15:57:59,569 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:57:59,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:57:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:57:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-10-12 15:57:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 15:57:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-12 15:57:59,583 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 47 [2020-10-12 15:57:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:59,583 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-12 15:57:59,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:57:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-12 15:57:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:57:59,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:59,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:59,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:57:59,585 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -783323418, now seen corresponding path program 1 times [2020-10-12 15:57:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:59,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656555805] [2020-10-12 15:57:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:59,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:00,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:01,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:58:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:02,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:58:02,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:58:02,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:58:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:58:02,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:58:02,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:58:02,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:58:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:58:02,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:58:02,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,993 ERROR L253 erpolLogProxyWrapper]: Interpolant 1 not inductive [2020-10-12 15:58:03,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:58:03,055 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:378) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-12 15:58:03,062 INFO L168 Benchmark]: Toolchain (without parser) took 102157.47 ms. Allocated memory was 140.0 MB in the beginning and 1.1 GB in the end (delta: 998.8 MB). Free memory was 101.2 MB in the beginning and 85.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,063 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.92 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 166.5 MB in the end (delta: -65.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,064 INFO L168 Benchmark]: Boogie Preprocessor took 70.53 ms. Allocated memory is still 202.9 MB. Free memory was 166.5 MB in the beginning and 163.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,065 INFO L168 Benchmark]: RCFGBuilder took 726.57 ms. Allocated memory is still 202.9 MB. Free memory was 163.6 MB in the beginning and 113.5 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,066 INFO L168 Benchmark]: TraceAbstraction took 100644.99 ms. Allocated memory was 202.9 MB in the beginning and 1.1 GB in the end (delta: 935.9 MB). Free memory was 112.6 MB in the beginning and 85.8 MB in the end (delta: 26.8 MB). Peak memory consumption was 962.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:58:03,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 709.92 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 166.5 MB in the end (delta: -65.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.53 ms. Allocated memory is still 202.9 MB. Free memory was 166.5 MB in the beginning and 163.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 726.57 ms. Allocated memory is still 202.9 MB. Free memory was 163.6 MB in the beginning and 113.5 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 100644.99 ms. Allocated memory was 202.9 MB in the beginning and 1.1 GB in the end (delta: 935.9 MB). Free memory was 112.6 MB in the beginning and 85.8 MB in the end (delta: 26.8 MB). Peak memory consumption was 962.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...