/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-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:48:29,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:48:29,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:48:29,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:48:29,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:48:29,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:48:29,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:48:29,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:48:29,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:48:29,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:48:29,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:48:29,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:48:29,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:48:29,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:48:29,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:48:29,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:48:29,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:48:29,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:48:29,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:48:29,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:48:29,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:48:29,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:48:29,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:48:29,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:48:29,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:48:29,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:48:29,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:48:29,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:48:29,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:48:29,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:48:29,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:48:29,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:48:29,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:48:29,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:48:29,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:48:29,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:48:29,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:48:29,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:48:29,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:48:29,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:48:29,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:48:29,634 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 15:48:29,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:48:29,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:48:29,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:48:29,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:48:29,685 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:48:29,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:48:29,685 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:48:29,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:48:29,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:48:29,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:48:29,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:48:29,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:48:29,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:48:29,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:48:29,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:48:29,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:48:29,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:48:29,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:48:29,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:48:29,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:48:29,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:48:29,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:48:29,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:48:29,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:48:29,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:48:29,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:48:29,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:48:29,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:48:29,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:48:29,693 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 15:48:30,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:48:30,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:48:30,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:48:30,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:48:30,035 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:48:30,036 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-10-12 15:48:30,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa3e88699/626f56dd2c0d4d85b6338a4441c3e33c/FLAGfd4763d6b [2020-10-12 15:48:30,565 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:48:30,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_search-1.i [2020-10-12 15:48:30,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa3e88699/626f56dd2c0d4d85b6338a4441c3e33c/FLAGfd4763d6b [2020-10-12 15:48:30,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa3e88699/626f56dd2c0d4d85b6338a4441c3e33c [2020-10-12 15:48:30,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:48:30,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:48:30,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:30,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:48:30,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:48:30,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:30" (1/1) ... [2020-10-12 15:48:30,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca84ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:30, skipping insertion in model container [2020-10-12 15:48:30,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:30" (1/1) ... [2020-10-12 15:48:30,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:48:30,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:48:31,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:31,421 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:48:31,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:31,553 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:48:31,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31 WrapperNode [2020-10-12 15:48:31,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:31,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:48:31,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:48:31,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:48:31,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (1/1) ... [2020-10-12 15:48:31,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:48:31,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:48:31,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:48:31,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:48:31,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (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 15:48:31,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-12 15:48:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-10-12 15:48:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-10-12 15:48:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:48:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:48:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 15:48:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:48:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:48:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:48:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:48:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:48:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:48:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:48:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:48:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:48:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:48:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:48:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:48:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:48:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:48:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:48:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:48:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:48:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:48:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:48:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:48:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:48:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:48:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:48:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:48:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:48:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:48:31,717 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:48:31,717 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:48:31,718 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:48:31,719 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:48:31,720 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:48:31,720 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:48:31,720 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:48:31,720 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:48:31,721 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:48:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:48:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:48:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:48:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:48:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:48:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:48:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-10-12 15:48:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:48:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:48:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-10-12 15:48:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:48:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:48:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:48:31,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:48:31,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:48:31,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:48:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:48:32,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:48:32,226 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:48:32,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:32 BoogieIcfgContainer [2020-10-12 15:48:32,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:48:32,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:48:32,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:48:32,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:48:32,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:48:30" (1/3) ... [2020-10-12 15:48:32,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd520fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:32, skipping insertion in model container [2020-10-12 15:48:32,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:31" (2/3) ... [2020-10-12 15:48:32,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd520fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:32, skipping insertion in model container [2020-10-12 15:48:32,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:32" (3/3) ... [2020-10-12 15:48:32,240 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-10-12 15:48:32,251 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:48:32,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:48:32,274 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:48:32,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:48:32,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:48:32,301 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:48:32,301 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:48:32,304 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:48:32,304 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:48:32,304 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:48:32,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:48:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-12 15:48:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:48:32,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:32,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:32,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-10-12 15:48:32,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:32,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414651660] [2020-10-12 15:48:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:48:37,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:48:37,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:48:37,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 15:48:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:48:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:48:37,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:37,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:37,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:48:37,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:37,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:37,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:48:37,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:37,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:37,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:37,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 15:48:37,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:48:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:37,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:48:37,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:37,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:37,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:37,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 15:48:37,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:48:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:37,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:37,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:48:37,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:37,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-12 15:48:37,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:37,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:37,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:37,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:37,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:37,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:37,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 15:48:37,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:37,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:48:38,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414651660] [2020-10-12 15:48:38,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:38,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:48:38,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192722743] [2020-10-12 15:48:38,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:48:38,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:48:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:48:38,057 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 8 states. [2020-10-12 15:48:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:38,555 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-10-12 15:48:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:48:38,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-12 15:48:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:38,569 INFO L225 Difference]: With dead ends: 95 [2020-10-12 15:48:38,569 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 15:48:38,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:48:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 15:48:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-12 15:48:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:48:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-12 15:48:38,638 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-10-12 15:48:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:38,639 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-12 15:48:38,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:48:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-12 15:48:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:48:38,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:38,645 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:38,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:48:38,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-10-12 15:48:38,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:38,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798113870] [2020-10-12 15:48:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:48:39,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-12 15:48:39,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:48:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 15:48:39,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:48:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:48:39,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:39,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:39,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:39,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:48:39,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:39,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:48:39,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:39,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 15:48:39,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:39,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 15:48:39,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:39,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:48:39,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:48:39,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:48:39,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:39,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:48:39,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:48:39,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 15:48:39,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798113870] [2020-10-12 15:48:39,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:48:39,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 15:48:39,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368994163] [2020-10-12 15:48:39,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:48:39,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:48:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:48:39,732 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2020-10-12 15:48:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:40,547 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-12 15:48:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:48:40,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-12 15:48:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:40,554 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:48:40,555 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:48:40,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:48:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:48:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-12 15:48:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:48:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-12 15:48:40,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-10-12 15:48:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:40,579 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-12 15:48:40,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:48:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-12 15:48:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:48:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:40,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:40,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:48:40,587 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-10-12 15:48:40,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:40,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426179229] [2020-10-12 15:48:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:40,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:40,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:48:41,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:41,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-12 15:48:41,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 15:48:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:48:41,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:41,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:41,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:41,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:41,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:48:41,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:41,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:48:41,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:41,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 15:48:41,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:48:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:48:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:41,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:48:41,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:41,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:48:41,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:48:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:48:41,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 15:48:41,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426179229] [2020-10-12 15:48:41,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:48:41,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:48:41,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970952178] [2020-10-12 15:48:41,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:48:41,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:48:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:48:41,373 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-10-12 15:48:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:41,799 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-12 15:48:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:48:41,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-12 15:48:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:41,801 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:48:41,801 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:48:41,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:48:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 15:48:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:48:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 15:48:41,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-10-12 15:48:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:41,816 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 15:48:41,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:48:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 15:48:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:48:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:41,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:41,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:48:41,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-10-12 15:48:41,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:41,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146180760] [2020-10-12 15:48:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:48:44,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:44,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2393 [2020-10-12 15:48:44,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:44,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 15:48:44,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:48:44,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:44,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:44,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:44,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:44,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:44,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:44,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:44,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:44,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:44,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:44,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:44,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 15:48:44,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:48:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:44,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 15:48:44,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:48:44,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:48:44,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:48:44,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:44,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 15:48:44,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:48:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:48:44,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:48:44,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146180760] [2020-10-12 15:48:44,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:44,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:48:44,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490117202] [2020-10-12 15:48:44,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:48:44,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:48:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:48:44,883 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 19 states. [2020-10-12 15:48:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:45,921 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-12 15:48:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:48:45,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-12 15:48:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:45,923 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:48:45,923 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:48:45,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:48:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:48:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-12 15:48:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:48:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 15:48:45,935 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-10-12 15:48:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:45,936 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 15:48:45,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:48:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 15:48:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:45,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:45,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:45,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:48:45,938 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-10-12 15:48:45,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:45,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549973235] [2020-10-12 15:48:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:48:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-12 15:48:46,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:48:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:48:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:48:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:46,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:46,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:46,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:48:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:46,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:47,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:47,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:47,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:48:47,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:48:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:48:47,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:47,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:47,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:47,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:47,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 15:48:47,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:48:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:48:47,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:47,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:47,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:47,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:47,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 15:48:47,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:47,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:48:47,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:48:47,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:47,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:47,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:48:47,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:47,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 15:48:47,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:48:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:48:47,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:48:48,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549973235] [2020-10-12 15:48:48,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:48,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:48:48,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096798451] [2020-10-12 15:48:48,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:48:48,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:48:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:48:48,081 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 21 states. [2020-10-12 15:48:48,459 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-12 15:48:48,794 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2020-10-12 15:48:49,028 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 15:48:49,729 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:48:49,987 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 15:48:50,221 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2020-10-12 15:48:50,997 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-12 15:48:51,161 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-12 15:48:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:51,327 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 15:48:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:48:51,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 15:48:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:51,330 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:48:51,330 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:48:51,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:48:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:48:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-12 15:48:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:48:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-12 15:48:51,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 53 [2020-10-12 15:48:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:51,342 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-12 15:48:51,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:48:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-12 15:48:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:51,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:51,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:51,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:48:51,344 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:51,344 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-10-12 15:48:51,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:51,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600338595] [2020-10-12 15:48:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:48:52,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:52,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-12 15:48:52,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:52,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 15:48:52,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:48:52,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:52,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:52,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:52,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:48:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:52,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 15:48:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:52,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:48:52,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:48:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:48:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:48:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 15:48:52,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:48:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:48:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 15:48:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:48:52,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 15:48:52,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:48:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:48:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:48:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:48:53,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600338595] [2020-10-12 15:48:53,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:53,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:48:53,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823455265] [2020-10-12 15:48:53,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:48:53,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:48:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:53,017 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 16 states. [2020-10-12 15:48:53,468 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-12 15:48:53,951 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-12 15:48:54,856 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-12 15:48:55,144 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 15:48:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:55,282 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-12 15:48:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:48:55,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-12 15:48:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:55,287 INFO L225 Difference]: With dead ends: 80 [2020-10-12 15:48:55,287 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 15:48:55,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:48:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 15:48:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-12 15:48:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:48:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-12 15:48:55,299 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 53 [2020-10-12 15:48:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:55,300 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-12 15:48:55,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:48:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-12 15:48:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:48:55,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:55,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:55,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:48:55,302 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-10-12 15:48:55,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:55,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692840036] [2020-10-12 15:48:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:48:55,330 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:48:55,330 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:48:55,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:48:55,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:48:55 BoogieIcfgContainer [2020-10-12 15:48:55,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:48:55,358 INFO L168 Benchmark]: Toolchain (without parser) took 24454.32 ms. Allocated memory was 144.2 MB in the beginning and 507.5 MB in the end (delta: 363.3 MB). Free memory was 99.1 MB in the beginning and 184.4 MB in the end (delta: -85.3 MB). Peak memory consumption was 278.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:48:55,359 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:48:55,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.70 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 98.7 MB in the beginning and 169.1 MB in the end (delta: -70.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-10-12 15:48:55,360 INFO L168 Benchmark]: Boogie Preprocessor took 80.59 ms. Allocated memory is still 203.9 MB. Free memory was 169.1 MB in the beginning and 166.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:48:55,361 INFO L168 Benchmark]: RCFGBuilder took 595.05 ms. Allocated memory is still 203.9 MB. Free memory was 166.4 MB in the beginning and 121.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:48:55,362 INFO L168 Benchmark]: TraceAbstraction took 23123.80 ms. Allocated memory was 203.9 MB in the beginning and 507.5 MB in the end (delta: 303.6 MB). Free memory was 120.4 MB in the beginning and 184.4 MB in the end (delta: -64.0 MB). Peak memory consumption was 239.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:48:55,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.70 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 98.7 MB in the beginning and 169.1 MB in the end (delta: -70.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.59 ms. Allocated memory is still 203.9 MB. Free memory was 169.1 MB in the beginning and 166.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 595.05 ms. Allocated memory is still 203.9 MB. Free memory was 166.4 MB in the beginning and 121.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23123.80 ms. Allocated memory was 203.9 MB in the beginning and 507.5 MB in the end (delta: 303.6 MB). Free memory was 120.4 MB in the beginning and 184.4 MB in the end (delta: -64.0 MB). Peak memory consumption was 239.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; [L543] int i; [L544] mlist *mylist, *temp; [L545] CALL insert_list(mylist,2) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) [L539] head = l [L540] return 0; [L545] RET insert_list(mylist,2) [L546] CALL insert_list(mylist,5) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L546] RET insert_list(mylist,5) [L547] CALL insert_list(mylist,1) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L547] RET insert_list(mylist,1) [L548] CALL insert_list(mylist,3) [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head [L539] head = l [L540] return 0; [L548] RET insert_list(mylist,3) [L549] CALL, EXPR search_list(head,2) [L524] l = head [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; [L549] RET, EXPR search_list(head,2) [L549] temp = search_list(head,2) [L550] EXPR temp->key [L550] CALL __VERIFIER_assert(temp->key==1) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.0s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 502 SDslu, 592 SDs, 0 SdLazy, 2032 SolverSat, 278 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 178320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 148/201 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...