/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:21:10,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:21:11,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:21:11,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:21:11,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:21:11,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:21:11,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:21:11,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:21:11,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:21:11,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:21:11,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:21:11,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:21:11,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:21:11,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:21:11,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:21:11,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:21:11,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:21:11,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:21:11,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:21:11,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:21:11,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:21:11,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:21:11,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:21:11,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:21:11,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:21:11,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:21:11,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:21:11,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:21:11,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:21:11,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:21:11,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:21:11,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:21:11,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:21:11,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:21:11,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:21:11,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:21:11,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:21:11,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:21:11,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:21:11,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:21:11,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:21:11,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:21:11,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:21:11,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:21:11,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:21:11,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:21:11,156 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:21:11,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:21:11,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:21:11,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:21:11,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:21:11,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:21:11,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:21:11,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:21:11,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:21:11,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:21:11,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:21:11,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:21:11,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:21:11,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:21:11,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:21:11,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:21:11,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:21:11,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:21:11,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:21:11,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:21:11,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:21:11,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:21:11,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:21:11,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:21:11,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:21:11,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:21:11,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:21:11,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:21:11,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:21:11,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:21:11,499 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:21:11,499 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-13 10:21:11,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16488a075/071b8c0d3b0e4ff3bc9eabbcc9b32a64/FLAG0c7eea9f3 [2020-10-13 10:21:12,117 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:21:12,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-13 10:21:12,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16488a075/071b8c0d3b0e4ff3bc9eabbcc9b32a64/FLAG0c7eea9f3 [2020-10-13 10:21:12,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16488a075/071b8c0d3b0e4ff3bc9eabbcc9b32a64 [2020-10-13 10:21:12,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:21:12,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:21:12,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:12,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:21:12,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:21:12,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3346c7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:12, skipping insertion in model container [2020-10-13 10:21:12,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:21:12" (1/1) ... [2020-10-13 10:21:12,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:21:12,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:21:12,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:12,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:21:12,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:21:13,045 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:21:13,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13 WrapperNode [2020-10-13 10:21:13,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:21:13,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:21:13,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:21:13,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:21:13,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... [2020-10-13 10:21:13,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:21:13,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:21:13,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:21:13,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:21:13,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:21:13,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:21:13,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:21:13,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:21:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:21:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:21:13,196 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:21:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:21:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:21:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:21:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:21:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:21:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:21:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:21:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:21:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:21:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:21:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:21:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:21:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:21:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:21:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:21:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:21:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:21:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:21:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:21:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:21:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:21:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:21:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:21:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:21:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:21:13,205 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:21:13,205 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:21:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:21:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:21:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:21:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:21:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:21:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:21:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:21:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:21:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:21:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:21:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:21:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:21:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:21:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:21:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:21:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:21:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:21:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:21:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:21:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:21:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:21:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:21:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:21:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:21:13,214 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:21:13,214 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:21:13,215 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:21:13,215 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:21:13,216 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:21:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:21:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:21:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:21:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:21:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:21:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:21:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:21:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:21:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:21:13,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:21:13,946 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:21:13,946 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-13 10:21:13,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:13 BoogieIcfgContainer [2020-10-13 10:21:13,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:21:13,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:21:13,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:21:13,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:21:13,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:21:12" (1/3) ... [2020-10-13 10:21:13,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3deb48cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:13, skipping insertion in model container [2020-10-13 10:21:13,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:21:13" (2/3) ... [2020-10-13 10:21:13,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3deb48cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:21:13, skipping insertion in model container [2020-10-13 10:21:13,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:21:13" (3/3) ... [2020-10-13 10:21:13,960 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-10-13 10:21:13,971 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:21:13,979 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-10-13 10:21:13,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-13 10:21:14,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:21:14,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:21:14,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:21:14,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:21:14,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:21:14,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:21:14,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:21:14,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:21:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-13 10:21:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:21:14,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:14,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:14,047 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:14,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-10-13 10:21:14,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:14,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933795465] [2020-10-13 10:21:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:21:14,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:14,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-13 10:21:14,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:21:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:21:14,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:14,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:21:14,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:14,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:14,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933795465] [2020-10-13 10:21:14,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:14,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:21:14,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464769767] [2020-10-13 10:21:14,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:21:14,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:21:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:14,653 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-10-13 10:21:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:14,824 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-10-13 10:21:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:21:14,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:21:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:14,837 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:21:14,837 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:21:14,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:21:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:21:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 10:21:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:21:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-13 10:21:14,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 10 [2020-10-13 10:21:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:14,887 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-13 10:21:14,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:21:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-13 10:21:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:21:14,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:14,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:14,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:21:14,889 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash -338068956, now seen corresponding path program 1 times [2020-10-13 10:21:14,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:14,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287552546] [2020-10-13 10:21:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:14,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:14,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:21:14,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:14,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 10:21:14,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:21:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:15,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:15,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:15,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:15,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:15,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:15,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287552546] [2020-10-13 10:21:15,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:15,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:15,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292019927] [2020-10-13 10:21:15,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:15,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:15,046 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 5 states. [2020-10-13 10:21:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:15,215 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 10:21:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:15,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-13 10:21:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:15,217 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:21:15,217 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:21:15,219 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 [2020-10-13 10:21:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:21:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-13 10:21:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:21:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-13 10:21:15,227 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 11 [2020-10-13 10:21:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:15,227 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-13 10:21:15,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-13 10:21:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:21:15,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:15,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:15,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:21:15,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-10-13 10:21:15,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:15,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357082374] [2020-10-13 10:21:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:21:15,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 10:21:15,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:21:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:21:15,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:15,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:15,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:15,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357082374] [2020-10-13 10:21:15,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:15,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:15,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35702958] [2020-10-13 10:21:15,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:15,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:15,474 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2020-10-13 10:21:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:15,628 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-13 10:21:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:15,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:21:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:15,630 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:21:15,630 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:21:15,631 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 [2020-10-13 10:21:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:21:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:21:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:21:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-13 10:21:15,639 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-10-13 10:21:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:15,639 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-13 10:21:15,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-13 10:21:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:21:15,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:15,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:15,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:21:15,641 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-10-13 10:21:15,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:15,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056549573] [2020-10-13 10:21:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:21:15,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-13 10:21:15,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:21:15,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:15,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:15,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:15,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:15,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:15,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:15,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056549573] [2020-10-13 10:21:15,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:15,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:15,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251953552] [2020-10-13 10:21:15,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:15,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:15,848 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2020-10-13 10:21:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:16,087 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 10:21:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:16,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 10:21:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:16,088 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:21:16,089 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:21:16,089 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 [2020-10-13 10:21:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:21:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-10-13 10:21:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:21:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 10:21:16,097 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-10-13 10:21:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:16,098 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 10:21:16,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 10:21:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:21:16,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:16,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:16,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:21:16,100 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-10-13 10:21:16,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:16,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66910163] [2020-10-13 10:21:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:21:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:21:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:16,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:16,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:16,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:16,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66910163] [2020-10-13 10:21:16,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:16,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:16,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004580774] [2020-10-13 10:21:16,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:16,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:16,353 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-10-13 10:21:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:16,589 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-13 10:21:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:21:16,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:21:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:16,591 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:21:16,591 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:21:16,591 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 [2020-10-13 10:21:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:21:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:21:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:21:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 10:21:16,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-10-13 10:21:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:16,598 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 10:21:16,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 10:21:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:21:16,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:16,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:16,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:21:16,599 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-10-13 10:21:16,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:16,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615313777] [2020-10-13 10:21:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:21:16,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 10:21:16,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:16,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:21:16,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:16,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:16,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:16,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:16,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:16,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:16,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:16,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615313777] [2020-10-13 10:21:16,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:16,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:21:16,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665800070] [2020-10-13 10:21:16,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:21:16,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:21:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:21:16,947 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-10-13 10:21:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:17,124 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-13 10:21:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:21:17,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 10:21:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:17,126 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:21:17,126 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:21:17,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:21:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:21:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:21:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 10:21:17,136 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-10-13 10:21:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:17,139 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 10:21:17,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:21:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 10:21:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:21:17,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:17,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:17,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:21:17,142 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-10-13 10:21:17,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:17,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185888711] [2020-10-13 10:21:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:21:17,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:17,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-13 10:21:17,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:21:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:21:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:17,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:17,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185888711] [2020-10-13 10:21:17,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:21:17,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:21:17,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746649041] [2020-10-13 10:21:17,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:17,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:17,551 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-10-13 10:21:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:17,755 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-13 10:21:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:21:17,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:21:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:17,756 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:21:17,756 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:21:17,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:21:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:21:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 10:21:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:21:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 10:21:17,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 18 [2020-10-13 10:21:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:17,763 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 10:21:17,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 10:21:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:21:17,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:17,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:17,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:21:17,765 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-10-13 10:21:17,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:17,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168719472] [2020-10-13 10:21:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:21:17,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:17,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 10:21:17,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:21:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:21:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:17,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:17,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:17,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:17,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:17,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:17,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:17,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168719472] [2020-10-13 10:21:17,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:17,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:21:17,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361739512] [2020-10-13 10:21:17,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:21:17,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:21:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:21:17,970 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-10-13 10:21:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:18,294 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-13 10:21:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:21:18,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:21:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:18,296 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:21:18,296 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:21:18,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:21:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:21:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:21:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-13 10:21:18,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 21 [2020-10-13 10:21:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:18,302 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-13 10:21:18,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:21:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-13 10:21:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:21:18,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:18,304 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:18,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:21:18,304 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-10-13 10:21:18,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:18,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158171093] [2020-10-13 10:21:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:18,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:21:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:21:18,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:18,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:18,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:18,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:18,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:18,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:18,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158171093] [2020-10-13 10:21:18,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:18,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:21:18,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847942888] [2020-10-13 10:21:18,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:21:18,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:21:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:21:18,863 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-10-13 10:21:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:19,238 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-13 10:21:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:21:19,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 10:21:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:19,239 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:21:19,239 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:21:19,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:21:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:21:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 10:21:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:21:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-13 10:21:19,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-10-13 10:21:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:19,245 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-13 10:21:19,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:21:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-13 10:21:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:21:19,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:19,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:19,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:21:19,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash -377613816, now seen corresponding path program 1 times [2020-10-13 10:21:19,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:19,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135396725] [2020-10-13 10:21:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:19,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:21:19,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-13 10:21:19,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:21:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:21:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:19,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:19,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:19,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:19,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:19,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135396725] [2020-10-13 10:21:19,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:19,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:21:19,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709082635] [2020-10-13 10:21:19,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:21:19,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:21:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:19,894 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2020-10-13 10:21:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:20,726 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-13 10:21:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:21:20,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 10:21:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:20,728 INFO L225 Difference]: With dead ends: 120 [2020-10-13 10:21:20,728 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:21:20,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:21:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:21:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2020-10-13 10:21:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:21:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-13 10:21:20,742 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-10-13 10:21:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:20,746 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-13 10:21:20,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:21:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-13 10:21:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:21:20,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:20,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:20,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:21:20,750 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -243600310, now seen corresponding path program 1 times [2020-10-13 10:21:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:20,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792849260] [2020-10-13 10:21:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:21,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:21,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:21:21,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 10:21:21,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:21:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:21:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:21,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:21,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:21,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:21,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:21,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:21:21,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:21,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:21,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:21,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:21,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:21:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:21,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792849260] [2020-10-13 10:21:21,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:21,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:21:21,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883483886] [2020-10-13 10:21:21,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:21:21,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:21:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:21,332 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 9 states. [2020-10-13 10:21:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:21,992 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-13 10:21:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:21:21,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 10:21:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:21,996 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:21:21,996 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:21:21,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:21:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:21:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-13 10:21:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:21:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-13 10:21:22,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 32 [2020-10-13 10:21:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:22,005 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-13 10:21:22,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:21:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-13 10:21:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:21:22,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:22,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:22,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:21:22,007 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:22,008 INFO L82 PathProgramCache]: Analyzing trace with hash 145286649, now seen corresponding path program 2 times [2020-10-13 10:21:22,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:22,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028193181] [2020-10-13 10:21:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:22,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:22,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:21:22,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:21:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-13 10:21:22,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:22,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:21:22,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:21:22,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:21:22,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:21:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:21:23,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:21:23,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:21:23,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:21:23,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:21:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:21:23,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:21:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:21:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:21:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:21:23,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:21:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:21:23,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028193181] [2020-10-13 10:21:23,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:21:23,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:21:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295992890] [2020-10-13 10:21:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:21:23,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:21:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:21:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:21:23,101 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 9 states. [2020-10-13 10:21:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:21:23,546 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-10-13 10:21:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:21:23,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 10:21:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:21:23,550 INFO L225 Difference]: With dead ends: 105 [2020-10-13 10:21:23,550 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 10:21:23,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:21:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 10:21:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-13 10:21:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:21:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-13 10:21:23,564 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 35 [2020-10-13 10:21:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:21:23,565 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-13 10:21:23,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:21:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-13 10:21:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:21:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:21:23,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:21:23,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:21:23,569 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:21:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:21:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -969799515, now seen corresponding path program 1 times [2020-10-13 10:21:23,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:21:23,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946071077] [2020-10-13 10:21:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:21:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:21:23,623 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:21:23,623 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:21:23,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:21:23,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:21:23 BoogieIcfgContainer [2020-10-13 10:21:23,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:21:23,673 INFO L168 Benchmark]: Toolchain (without parser) took 11228.26 ms. Allocated memory was 140.5 MB in the beginning and 357.6 MB in the end (delta: 217.1 MB). Free memory was 101.0 MB in the beginning and 144.7 MB in the end (delta: -43.7 MB). Peak memory consumption was 173.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,674 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 606.31 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 169.8 MB in the end (delta: -69.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,676 INFO L168 Benchmark]: Boogie Preprocessor took 72.88 ms. Allocated memory is still 203.4 MB. Free memory was 169.8 MB in the beginning and 166.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,678 INFO L168 Benchmark]: RCFGBuilder took 831.27 ms. Allocated memory is still 203.4 MB. Free memory was 166.0 MB in the beginning and 114.1 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,687 INFO L168 Benchmark]: TraceAbstraction took 9712.83 ms. Allocated memory was 203.4 MB in the beginning and 357.6 MB in the end (delta: 154.1 MB). Free memory was 114.1 MB in the beginning and 144.7 MB in the end (delta: -30.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:21:23,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 606.31 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 169.8 MB in the end (delta: -69.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.88 ms. Allocated memory is still 203.4 MB. Free memory was 169.8 MB in the beginning and 166.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 831.27 ms. Allocated memory is still 203.4 MB. Free memory was 166.0 MB in the beginning and 114.1 MB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9712.83 ms. Allocated memory was 203.4 MB in the beginning and 357.6 MB in the end (delta: 154.1 MB). Free memory was 114.1 MB in the beginning and 144.7 MB in the end (delta: -30.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1041] EXPR end->next [L1041] end = end->next [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND TRUE RED == end->colour [L1036] EXPR end->next [L1036] end = end->next [L1037] COND FALSE !(!(null != end)) [L1038] EXPR end->colour [L1038] COND TRUE !(BLACK != end->colour) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.6s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 414 SDtfs, 381 SDslu, 994 SDs, 0 SdLazy, 1469 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=11, 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, 12 MinimizatonAttempts, 107 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 55408 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 6/21 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...