/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:06:16,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:06:16,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:06:16,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:06:16,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:06:16,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:06:16,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:06:16,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:06:16,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:06:16,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:06:16,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:06:16,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:06:16,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:06:16,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:06:16,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:06:16,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:06:16,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:06:16,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:06:16,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:06:16,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:06:16,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:06:16,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:06:16,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:06:16,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:06:16,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:06:16,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:06:16,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:06:16,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:06:16,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:06:16,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:06:16,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:06:16,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:06:16,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:06:16,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:06:16,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:06:16,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:06:16,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:06:16,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:06:16,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:06:16,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:06:16,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:06:16,761 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 [2020-08-18 17:06:16,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:06:16,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:06:16,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:06:16,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:06:16,804 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:06:16,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:06:16,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:06:16,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:06:16,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:06:16,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:06:16,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:06:16,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:06:16,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:06:16,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:06:16,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:06:16,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:06:16,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:06:16,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:06:16,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:06:16,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:06:16,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:06:16,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:06:16,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:06:16,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:06:16,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:06:16,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:06:16,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:06:16,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:06:16,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:06:16,809 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=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:06:17,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:06:17,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:06:17,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:06:17,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:06:17,183 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:06:17,184 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 17:06:17,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e2343d60/17a0114f6bff4f7a85991605ff96faae/FLAG39fa7f6d5 [2020-08-18 17:06:17,769 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:06:17,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 17:06:17,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e2343d60/17a0114f6bff4f7a85991605ff96faae/FLAG39fa7f6d5 [2020-08-18 17:06:18,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e2343d60/17a0114f6bff4f7a85991605ff96faae [2020-08-18 17:06:18,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:06:18,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:06:18,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:06:18,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:06:18,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:06:18,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5996606d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18, skipping insertion in model container [2020-08-18 17:06:18,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:06:18,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:06:18,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:06:18,785 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:06:18,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:06:18,936 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:06:18,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18 WrapperNode [2020-08-18 17:06:18,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:06:18,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:06:18,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:06:18,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:06:18,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:18,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:19,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:19,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (1/1) ... [2020-08-18 17:06:19,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:06:19,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:06:19,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:06:19,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:06:19,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (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 [2020-08-18 17:06:19,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:06:19,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:06:19,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:06:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 17:06:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 17:06:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 17:06:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 17:06:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 17:06:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 17:06:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 17:06:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 17:06:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 17:06:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 17:06:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 17:06:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 17:06:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 17:06:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 17:06:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 17:06:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 17:06:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 17:06:19,097 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 17:06:19,097 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 17:06:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 17:06:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 17:06:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 17:06:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 17:06:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 17:06:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 17:06:19,101 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 17:06:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 17:06:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 17:06:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 17:06:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 17:06:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 17:06:19,104 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 17:06:19,104 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 17:06:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 17:06:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 17:06:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:06:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 17:06:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 17:06:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:06:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 17:06:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 17:06:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 17:06:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 17:06:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 17:06:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:06:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 17:06:19,109 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 17:06:19,109 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 17:06:19,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 17:06:19,110 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 17:06:19,110 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 17:06:19,110 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 17:06:19,110 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 17:06:19,110 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 17:06:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 17:06:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 17:06:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 17:06:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 17:06:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 17:06:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 17:06:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 17:06:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 17:06:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 17:06:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:06:19,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:06:19,751 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-18 17:06:19,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:06:19 BoogieIcfgContainer [2020-08-18 17:06:19,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:06:19,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:06:19,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:06:19,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:06:19,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:06:18" (1/3) ... [2020-08-18 17:06:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22997e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:06:19, skipping insertion in model container [2020-08-18 17:06:19,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:18" (2/3) ... [2020-08-18 17:06:19,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22997e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:06:19, skipping insertion in model container [2020-08-18 17:06:19,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:06:19" (3/3) ... [2020-08-18 17:06:19,764 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-18 17:06:19,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:06:19,783 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-18 17:06:19,799 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-18 17:06:19,827 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:06:19,827 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:06:19,828 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:06:19,828 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:06:19,828 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:06:19,828 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:06:19,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:06:19,829 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:06:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-18 17:06:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-18 17:06:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:19,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:19,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-18 17:06:19,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:19,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586865718] [2020-08-18 17:06:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:20,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586865718] [2020-08-18 17:06:20,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:20,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:20,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327947911] [2020-08-18 17:06:20,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:20,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:20,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:20,144 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-18 17:06:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:20,364 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-18 17:06:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:06:20,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-18 17:06:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:20,377 INFO L225 Difference]: With dead ends: 186 [2020-08-18 17:06:20,377 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 17:06:20,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 17:06:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-18 17:06:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 17:06:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 17:06:20,429 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-18 17:06:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:20,429 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 17:06:20,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 17:06:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:06:20,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:20,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:20,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:06:20,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:20,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-18 17:06:20,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:20,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423811762] [2020-08-18 17:06:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:20,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423811762] [2020-08-18 17:06:20,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:20,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:20,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181296008] [2020-08-18 17:06:20,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:20,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:20,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:20,512 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-18 17:06:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:20,677 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-18 17:06:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:06:20,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 17:06:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:20,679 INFO L225 Difference]: With dead ends: 84 [2020-08-18 17:06:20,679 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 17:06:20,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 17:06:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 17:06:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 17:06:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-18 17:06:20,691 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-18 17:06:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:20,692 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-18 17:06:20,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-18 17:06:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:06:20,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:20,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:20,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:06:20,693 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-18 17:06:20,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:20,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686555959] [2020-08-18 17:06:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:20,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686555959] [2020-08-18 17:06:20,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:20,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:06:20,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314787722] [2020-08-18 17:06:20,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:06:20,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:20,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:06:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:20,784 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-18 17:06:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:21,040 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-18 17:06:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:06:21,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 17:06:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:21,043 INFO L225 Difference]: With dead ends: 138 [2020-08-18 17:06:21,043 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 17:06:21,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 17:06:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-18 17:06:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 17:06:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-18 17:06:21,065 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-18 17:06:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:21,066 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-18 17:06:21,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:06:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-18 17:06:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:06:21,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:21,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:21,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:06:21,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-18 17:06:21,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:21,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84407571] [2020-08-18 17:06:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:21,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84407571] [2020-08-18 17:06:21,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:21,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:06:21,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402347654] [2020-08-18 17:06:21,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:06:21,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:06:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:21,206 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-18 17:06:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:21,399 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 17:06:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:06:21,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 17:06:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:21,401 INFO L225 Difference]: With dead ends: 84 [2020-08-18 17:06:21,401 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 17:06:21,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 17:06:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 17:06:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 17:06:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-18 17:06:21,409 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-18 17:06:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:21,410 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-18 17:06:21,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:06:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-18 17:06:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:06:21,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:21,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:21,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:06:21,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-18 17:06:21,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:21,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273756420] [2020-08-18 17:06:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:21,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273756420] [2020-08-18 17:06:21,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:21,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:06:21,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571323755] [2020-08-18 17:06:21,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:06:21,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:21,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:06:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:21,467 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-18 17:06:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:21,655 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-18 17:06:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:06:21,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 17:06:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:21,657 INFO L225 Difference]: With dead ends: 199 [2020-08-18 17:06:21,657 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 17:06:21,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 17:06:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-18 17:06:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 17:06:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 17:06:21,678 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-18 17:06:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:21,678 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 17:06:21,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:06:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 17:06:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:06:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:21,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:21,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:06:21,680 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-18 17:06:21,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:21,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342468364] [2020-08-18 17:06:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:21,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342468364] [2020-08-18 17:06:21,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:21,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:06:21,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029110682] [2020-08-18 17:06:21,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:06:21,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:21,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:06:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:21,781 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-18 17:06:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:21,984 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-18 17:06:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:06:21,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 17:06:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:21,986 INFO L225 Difference]: With dead ends: 126 [2020-08-18 17:06:21,986 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 17:06:21,987 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 [2020-08-18 17:06:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 17:06:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-18 17:06:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 17:06:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-18 17:06:21,994 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-18 17:06:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:21,995 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-18 17:06:21,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:06:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-18 17:06:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:06:21,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:21,996 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] [2020-08-18 17:06:21,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:06:21,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-18 17:06:21,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:21,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810585133] [2020-08-18 17:06:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:22,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810585133] [2020-08-18 17:06:22,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:22,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:06:22,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423461901] [2020-08-18 17:06:22,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:06:22,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:06:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:22,091 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-18 17:06:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:22,274 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-18 17:06:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:06:22,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 17:06:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:22,275 INFO L225 Difference]: With dead ends: 136 [2020-08-18 17:06:22,276 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 17:06:22,276 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 [2020-08-18 17:06:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 17:06:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-18 17:06:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 17:06:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-18 17:06:22,292 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-18 17:06:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:22,307 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-18 17:06:22,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:06:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-18 17:06:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:06:22,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:22,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:22,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:06:22,311 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-18 17:06:22,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:22,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404482165] [2020-08-18 17:06:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:22,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404482165] [2020-08-18 17:06:22,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:22,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:22,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442762871] [2020-08-18 17:06:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:22,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:22,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:22,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:22,358 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-18 17:06:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:22,474 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-18 17:06:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:06:22,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 17:06:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:22,476 INFO L225 Difference]: With dead ends: 141 [2020-08-18 17:06:22,476 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 17:06:22,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 17:06:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-18 17:06:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 17:06:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-18 17:06:22,482 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-18 17:06:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:22,483 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-18 17:06:22,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-18 17:06:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:06:22,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:22,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:22,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:06:22,485 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:22,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-18 17:06:22,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:22,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044200977] [2020-08-18 17:06:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:22,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044200977] [2020-08-18 17:06:22,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:22,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:22,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970102236] [2020-08-18 17:06:22,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:22,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:22,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:22,530 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-18 17:06:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:22,637 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-18 17:06:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:06:22,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 17:06:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:22,639 INFO L225 Difference]: With dead ends: 79 [2020-08-18 17:06:22,639 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 17:06:22,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 17:06:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-18 17:06:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 17:06:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-18 17:06:22,645 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-18 17:06:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:22,646 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-18 17:06:22,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-18 17:06:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:06:22,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:22,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:22,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:06:22,647 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-18 17:06:22,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:22,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130726139] [2020-08-18 17:06:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:22,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130726139] [2020-08-18 17:06:22,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:22,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:06:22,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892756825] [2020-08-18 17:06:22,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:06:22,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:06:22,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:22,706 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-18 17:06:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:22,849 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-18 17:06:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:06:22,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 17:06:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:22,853 INFO L225 Difference]: With dead ends: 78 [2020-08-18 17:06:22,854 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 17:06:22,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 17:06:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 17:06:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 17:06:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-18 17:06:22,860 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-18 17:06:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:22,860 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-18 17:06:22,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:06:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-18 17:06:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:06:22,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:22,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:22,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:06:22,862 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-18 17:06:22,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:22,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301512887] [2020-08-18 17:06:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:22,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301512887] [2020-08-18 17:06:22,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:22,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:06:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852297187] [2020-08-18 17:06:22,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:06:22,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:06:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:22,960 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-18 17:06:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:23,261 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-18 17:06:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:06:23,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 17:06:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:23,264 INFO L225 Difference]: With dead ends: 179 [2020-08-18 17:06:23,264 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 17:06:23,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:06:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 17:06:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-18 17:06:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 17:06:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-18 17:06:23,270 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-18 17:06:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:23,271 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-18 17:06:23,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:06:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-18 17:06:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:06:23,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:23,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:23,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:06:23,273 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-18 17:06:23,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:23,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393802899] [2020-08-18 17:06:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:06:23,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393802899] [2020-08-18 17:06:23,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:23,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 17:06:23,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944551534] [2020-08-18 17:06:23,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:06:23,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:06:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:06:23,553 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-18 17:06:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:24,315 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-18 17:06:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:06:24,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 17:06:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:24,319 INFO L225 Difference]: With dead ends: 182 [2020-08-18 17:06:24,320 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 17:06:24,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:06:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 17:06:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-18 17:06:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 17:06:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-18 17:06:24,328 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-18 17:06:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:24,329 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-18 17:06:24,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:06:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-18 17:06:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:06:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:24,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:24,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:06:24,331 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-18 17:06:24,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:24,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067598937] [2020-08-18 17:06:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:06:24,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067598937] [2020-08-18 17:06:24,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:24,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:06:24,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739623] [2020-08-18 17:06:24,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:06:24,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:06:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:06:24,409 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-18 17:06:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:24,617 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-18 17:06:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:06:24,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 17:06:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:24,619 INFO L225 Difference]: With dead ends: 150 [2020-08-18 17:06:24,620 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 17:06:24,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:06:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 17:06:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-18 17:06:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 17:06:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-18 17:06:24,636 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-18 17:06:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:24,636 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-18 17:06:24,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:06:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-18 17:06:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:06:24,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:24,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:24,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:06:24,649 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-18 17:06:24,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:24,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809798392] [2020-08-18 17:06:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:24,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:06:24,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809798392] [2020-08-18 17:06:24,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:24,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:24,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174090002] [2020-08-18 17:06:24,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:24,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:24,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:24,723 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-18 17:06:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:24,877 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-18 17:06:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:06:24,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 17:06:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:24,879 INFO L225 Difference]: With dead ends: 124 [2020-08-18 17:06:24,879 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 17:06:24,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 17:06:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-18 17:06:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 17:06:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-18 17:06:24,890 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-18 17:06:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:24,890 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-18 17:06:24,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-18 17:06:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:06:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:24,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:06:24,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:06:24,894 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-18 17:06:24,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:24,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650922485] [2020-08-18 17:06:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:06:24,915 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:06:24,915 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:06:24,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:06:24,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:06:24 BoogieIcfgContainer [2020-08-18 17:06:24,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:06:24,968 INFO L168 Benchmark]: Toolchain (without parser) took 6883.53 ms. Allocated memory was 140.5 MB in the beginning and 272.1 MB in the end (delta: 131.6 MB). Free memory was 102.4 MB in the beginning and 136.2 MB in the end (delta: -33.9 MB). Peak memory consumption was 97.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:24,969 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:06:24,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 855.20 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 102.2 MB in the beginning and 172.8 MB in the end (delta: -70.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:24,973 INFO L168 Benchmark]: Boogie Preprocessor took 77.76 ms. Allocated memory is still 206.6 MB. Free memory was 172.8 MB in the beginning and 169.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:24,974 INFO L168 Benchmark]: RCFGBuilder took 738.13 ms. Allocated memory is still 206.6 MB. Free memory was 169.4 MB in the beginning and 113.6 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:24,974 INFO L168 Benchmark]: TraceAbstraction took 5207.15 ms. Allocated memory was 206.6 MB in the beginning and 272.1 MB in the end (delta: 65.5 MB). Free memory was 112.9 MB in the beginning and 136.2 MB in the end (delta: -23.3 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:24,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 855.20 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 102.2 MB in the beginning and 172.8 MB in the end (delta: -70.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.76 ms. Allocated memory is still 206.6 MB. Free memory was 172.8 MB in the beginning and 169.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 738.13 ms. Allocated memory is still 206.6 MB. Free memory was 169.4 MB in the beginning and 113.6 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5207.15 ms. Allocated memory was 206.6 MB in the beginning and 272.1 MB in the end (delta: 65.5 MB). Free memory was 112.9 MB in the beginning and 136.2 MB in the end (delta: -23.3 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred 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, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...