/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:58,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:58,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:58,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:58,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:58,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:58,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:58,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:58,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:58,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:58,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:58,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:58,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:58,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:58,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:58,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:58,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:58,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:58,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:58,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:58,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:58,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:58,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:58,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:58,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:20:58,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:20:58,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:20:58,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:20:58,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:20:58,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:20:58,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:20:58,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:20:58,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:20:58,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:20:58,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:20:58,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:20:58,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:20:58,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:20:58,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:58,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:58,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:58,834 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 [2020-08-21 17:20:58,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:58,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:58,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:58,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:58,856 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:58,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:58,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:58,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:58,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:58,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:58,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:58,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:58,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:58,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:58,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:58,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:58,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:58,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:58,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:58,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:58,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:58,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:58,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:58,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:58,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:58,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:58,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:58,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:58,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:58,861 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:59,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:59,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:59,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:59,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:59,180 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:59,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-21 17:20:59,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dae04a33/804dc3ac20534ef9bd060425852bee06/FLAGdd261309f [2020-08-21 17:20:59,692 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:59,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-08-21 17:20:59,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dae04a33/804dc3ac20534ef9bd060425852bee06/FLAGdd261309f [2020-08-21 17:20:59,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dae04a33/804dc3ac20534ef9bd060425852bee06 [2020-08-21 17:21:00,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:21:00,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:21:00,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:21:00,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:21:00,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:21:00,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:59" (1/1) ... [2020-08-21 17:21:00,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642ea3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00, skipping insertion in model container [2020-08-21 17:21:00,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:59" (1/1) ... [2020-08-21 17:21:00,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:21:00,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:21:00,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:21:00,612 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:21:00,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:21:00,714 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:21:00,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00 WrapperNode [2020-08-21 17:21:00,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:21:00,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:21:00,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:21:00,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:21:00,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (1/1) ... [2020-08-21 17:21:00,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:21:00,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:21:00,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:21:00,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:21:00,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (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 [2020-08-21 17:21:00,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:21:00,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:21:00,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 17:21:00,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 17:21:00,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-21 17:21:00,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-21 17:21:00,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-21 17:21:00,861 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 17:21:00,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:21:00,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:21:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:21:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 17:21:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 17:21:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 17:21:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 17:21:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 17:21:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 17:21:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 17:21:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 17:21:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 17:21:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 17:21:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 17:21:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 17:21:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 17:21:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 17:21:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 17:21:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 17:21:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 17:21:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 17:21:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 17:21:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 17:21:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 17:21:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 17:21:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 17:21:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 17:21:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 17:21:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 17:21:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:21:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 17:21:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 17:21:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:21:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 17:21:00,876 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 17:21:00,876 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 17:21:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 17:21:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:21:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 17:21:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 17:21:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 17:21:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 17:21:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 17:21:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 17:21:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 17:21:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 17:21:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 17:21:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 17:21:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 17:21:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 17:21:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 17:21:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 17:21:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 17:21:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 17:21:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 17:21:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 17:21:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 17:21:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 17:21:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:21:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:21:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:21:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:21:01,367 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 17:21:01,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:21:01,551 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 17:21:01,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:21:01 BoogieIcfgContainer [2020-08-21 17:21:01,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:21:01,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:21:01,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:21:01,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:21:01,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:59" (1/3) ... [2020-08-21 17:21:01,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb89f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:21:01, skipping insertion in model container [2020-08-21 17:21:01,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:00" (2/3) ... [2020-08-21 17:21:01,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb89f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:21:01, skipping insertion in model container [2020-08-21 17:21:01,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:21:01" (3/3) ... [2020-08-21 17:21:01,563 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-21 17:21:01,574 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:21:01,582 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:21:01,596 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:21:01,651 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:21:01,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:21:01,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:21:01,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:21:01,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:21:01,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:21:01,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:21:01,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:21:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 17:21:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:21:01,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:01,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:01,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-08-21 17:21:01,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:01,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28406804] [2020-08-21 17:21:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:01,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:01,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28406804] [2020-08-21 17:21:01,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:01,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:21:01,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024368914] [2020-08-21 17:21:01,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:21:01,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:21:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:21:01,988 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 17:21:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:02,124 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-21 17:21:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:21:02,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 17:21:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:02,136 INFO L225 Difference]: With dead ends: 56 [2020-08-21 17:21:02,136 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 17:21:02,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:21:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 17:21:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 17:21:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 17:21:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-21 17:21:02,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-08-21 17:21:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:02,204 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-21 17:21:02,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:21:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-21 17:21:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:21:02,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:02,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:02,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:21:02,206 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:02,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-08-21 17:21:02,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:02,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172188551] [2020-08-21 17:21:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:02,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172188551] [2020-08-21 17:21:02,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:02,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:21:02,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389459886] [2020-08-21 17:21:02,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:21:02,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:21:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:21:02,373 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-21 17:21:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:02,525 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 17:21:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:21:02,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 17:21:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:02,529 INFO L225 Difference]: With dead ends: 50 [2020-08-21 17:21:02,529 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 17:21:02,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:21:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 17:21:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-08-21 17:21:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 17:21:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-08-21 17:21:02,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-08-21 17:21:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:02,540 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-08-21 17:21:02,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:21:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-08-21 17:21:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:21:02,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:02,542 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:02,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:21:02,543 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-08-21 17:21:02,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475859436] [2020-08-21 17:21:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:02,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475859436] [2020-08-21 17:21:02,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:02,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:21:02,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8684718] [2020-08-21 17:21:02,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:21:02,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:21:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:21:02,664 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-08-21 17:21:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:02,813 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-21 17:21:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:21:02,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 17:21:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:02,815 INFO L225 Difference]: With dead ends: 52 [2020-08-21 17:21:02,815 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 17:21:02,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:21:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 17:21:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-08-21 17:21:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 17:21:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-08-21 17:21:02,823 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-08-21 17:21:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:02,823 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-08-21 17:21:02,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:21:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-08-21 17:21:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:21:02,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:02,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:02,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:21:02,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-08-21 17:21:02,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:02,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105711099] [2020-08-21 17:21:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:02,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105711099] [2020-08-21 17:21:02,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:02,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:21:02,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513531121] [2020-08-21 17:21:02,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:21:02,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:21:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:21:02,924 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-08-21 17:21:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:03,070 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-21 17:21:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:21:03,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 17:21:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:03,072 INFO L225 Difference]: With dead ends: 52 [2020-08-21 17:21:03,072 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 17:21:03,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:21:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 17:21:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-08-21 17:21:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 17:21:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 17:21:03,079 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-08-21 17:21:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:03,079 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 17:21:03,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:21:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 17:21:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:21:03,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:03,081 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:03,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:21:03,081 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-08-21 17:21:03,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:03,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082461652] [2020-08-21 17:21:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:03,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082461652] [2020-08-21 17:21:03,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:03,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:21:03,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259682918] [2020-08-21 17:21:03,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:21:03,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:21:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:03,265 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-08-21 17:21:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:03,539 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 17:21:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:21:03,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-21 17:21:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:03,541 INFO L225 Difference]: With dead ends: 54 [2020-08-21 17:21:03,541 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 17:21:03,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 17:21:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-08-21 17:21:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 17:21:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-21 17:21:03,548 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-08-21 17:21:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:03,549 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-21 17:21:03,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:21:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-21 17:21:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:21:03,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:03,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:03,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:21:03,551 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-08-21 17:21:03,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:03,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101027453] [2020-08-21 17:21:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:03,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101027453] [2020-08-21 17:21:03,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:03,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:21:03,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591544368] [2020-08-21 17:21:03,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:21:03,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:21:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:03,710 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-08-21 17:21:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:04,019 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-08-21 17:21:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:21:04,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-21 17:21:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:04,020 INFO L225 Difference]: With dead ends: 63 [2020-08-21 17:21:04,020 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 17:21:04,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 17:21:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-21 17:21:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 17:21:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-21 17:21:04,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-08-21 17:21:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:04,034 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-21 17:21:04,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:21:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-21 17:21:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:21:04,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:04,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:04,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:21:04,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:04,040 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-08-21 17:21:04,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:04,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278582910] [2020-08-21 17:21:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:04,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278582910] [2020-08-21 17:21:04,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:04,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:21:04,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764537601] [2020-08-21 17:21:04,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:21:04,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:21:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:04,239 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-08-21 17:21:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:04,570 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-08-21 17:21:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:21:04,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-21 17:21:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:04,572 INFO L225 Difference]: With dead ends: 67 [2020-08-21 17:21:04,572 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 17:21:04,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 17:21:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-08-21 17:21:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 17:21:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-21 17:21:04,584 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-08-21 17:21:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:04,587 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-21 17:21:04,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:21:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-21 17:21:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:21:04,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:04,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:04,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:21:04,590 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-08-21 17:21:04,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:04,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962659726] [2020-08-21 17:21:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:04,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:04,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962659726] [2020-08-21 17:21:04,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:04,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:21:04,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266238053] [2020-08-21 17:21:04,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:21:04,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:04,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:21:04,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:04,760 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-08-21 17:21:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:05,043 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-08-21 17:21:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:21:05,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 17:21:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:05,044 INFO L225 Difference]: With dead ends: 69 [2020-08-21 17:21:05,044 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 17:21:05,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 17:21:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-08-21 17:21:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 17:21:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-08-21 17:21:05,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-08-21 17:21:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:05,051 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-08-21 17:21:05,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:21:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-08-21 17:21:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:21:05,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:05,053 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:05,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:21:05,053 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-08-21 17:21:05,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:05,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869175069] [2020-08-21 17:21:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:05,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869175069] [2020-08-21 17:21:05,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:05,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:21:05,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378005040] [2020-08-21 17:21:05,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:21:05,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:21:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:05,207 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-08-21 17:21:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:05,530 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-21 17:21:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:21:05,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 17:21:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:05,531 INFO L225 Difference]: With dead ends: 62 [2020-08-21 17:21:05,532 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 17:21:05,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 17:21:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-21 17:21:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 17:21:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-21 17:21:05,537 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-08-21 17:21:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:05,538 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-21 17:21:05,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:21:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-21 17:21:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:21:05,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:05,539 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:05,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:21:05,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-08-21 17:21:05,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:05,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102839043] [2020-08-21 17:21:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:05,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:05,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102839043] [2020-08-21 17:21:05,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:05,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:21:05,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019025836] [2020-08-21 17:21:05,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:21:05,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:21:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:05,737 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 13 states. [2020-08-21 17:21:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:06,127 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-21 17:21:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:21:06,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-21 17:21:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:06,128 INFO L225 Difference]: With dead ends: 62 [2020-08-21 17:21:06,128 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 17:21:06,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:21:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 17:21:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-08-21 17:21:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 17:21:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-21 17:21:06,135 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-08-21 17:21:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:06,136 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-21 17:21:06,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:21:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-21 17:21:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:21:06,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:06,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:06,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:21:06,137 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-08-21 17:21:06,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:06,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495586930] [2020-08-21 17:21:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:06,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495586930] [2020-08-21 17:21:06,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:06,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:21:06,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003435299] [2020-08-21 17:21:06,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:21:06,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:21:06,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:06,328 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-08-21 17:21:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:06,807 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-08-21 17:21:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:21:06,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-21 17:21:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:06,809 INFO L225 Difference]: With dead ends: 75 [2020-08-21 17:21:06,809 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 17:21:06,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:21:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 17:21:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-08-21 17:21:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 17:21:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-08-21 17:21:06,820 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2020-08-21 17:21:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:06,822 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-08-21 17:21:06,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:21:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-08-21 17:21:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 17:21:06,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:06,824 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:06,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:21:06,824 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 1 times [2020-08-21 17:21:06,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:06,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852883006] [2020-08-21 17:21:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:07,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852883006] [2020-08-21 17:21:07,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:07,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:21:07,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164169619] [2020-08-21 17:21:07,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:21:07,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:21:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:07,029 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-08-21 17:21:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:07,451 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-21 17:21:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:21:07,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-21 17:21:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:07,452 INFO L225 Difference]: With dead ends: 77 [2020-08-21 17:21:07,453 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 17:21:07,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:21:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 17:21:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-08-21 17:21:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 17:21:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-08-21 17:21:07,464 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 30 [2020-08-21 17:21:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:07,465 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-08-21 17:21:07,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:21:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-08-21 17:21:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 17:21:07,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:07,466 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:07,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:21:07,467 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:07,467 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-08-21 17:21:07,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:07,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724603937] [2020-08-21 17:21:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:07,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:07,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724603937] [2020-08-21 17:21:07,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:07,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:21:07,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25908475] [2020-08-21 17:21:07,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:21:07,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:21:07,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:07,804 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 13 states. [2020-08-21 17:21:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:08,329 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-08-21 17:21:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:21:08,330 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-21 17:21:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:08,331 INFO L225 Difference]: With dead ends: 84 [2020-08-21 17:21:08,331 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 17:21:08,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:21:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 17:21:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-21 17:21:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 17:21:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-08-21 17:21:08,351 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 30 [2020-08-21 17:21:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:08,351 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-08-21 17:21:08,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:21:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-08-21 17:21:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 17:21:08,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:08,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:08,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:21:08,353 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-08-21 17:21:08,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:08,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984540568] [2020-08-21 17:21:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:21:08,382 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:21:08,383 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:21:08,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:21:08,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:21:08 BoogieIcfgContainer [2020-08-21 17:21:08,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:21:08,433 INFO L168 Benchmark]: Toolchain (without parser) took 8421.48 ms. Allocated memory was 141.0 MB in the beginning and 309.9 MB in the end (delta: 168.8 MB). Free memory was 103.6 MB in the beginning and 183.7 MB in the end (delta: -80.1 MB). Peak memory consumption was 88.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,434 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.53 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 170.0 MB in the end (delta: -66.6 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,438 INFO L168 Benchmark]: Boogie Preprocessor took 65.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 167.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,442 INFO L168 Benchmark]: RCFGBuilder took 772.44 ms. Allocated memory is still 203.9 MB. Free memory was 167.4 MB in the beginning and 122.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,443 INFO L168 Benchmark]: TraceAbstraction took 6868.18 ms. Allocated memory was 203.9 MB in the beginning and 309.9 MB in the end (delta: 105.9 MB). Free memory was 122.1 MB in the beginning and 183.7 MB in the end (delta: -61.6 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:08,448 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 706.53 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 170.0 MB in the end (delta: -66.6 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 167.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 772.44 ms. Allocated memory is still 203.9 MB. Free memory was 167.4 MB in the beginning and 122.1 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6868.18 ms. Allocated memory was 203.9 MB in the beginning and 309.9 MB in the end (delta: 105.9 MB). Free memory was 122.1 MB in the beginning and 183.7 MB in the end (delta: -61.6 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 552 SDslu, 1158 SDs, 0 SdLazy, 2018 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=13, 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, 13 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 313 ConstructedInterpolants, 0 QuantifiedInterpolants, 70246 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 12/58 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...