/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:43:56,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:43:56,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:43:56,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:43:56,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:43:56,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:43:56,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:43:56,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:43:56,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:43:56,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:43:56,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:43:56,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:43:56,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:43:56,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:43:56,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:43:56,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:43:56,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:43:56,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:43:56,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:43:56,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:43:56,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:43:56,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:43:56,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:43:56,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:43:56,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:43:56,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:43:56,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:43:56,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:43:56,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:43:56,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:43:56,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:43:56,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:43:56,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:43:56,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:43:56,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:43:56,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:43:56,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:43:56,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:43:56,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:43:56,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:43:56,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:43:56,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:43:56,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:43:56,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:43:56,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:43:56,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:43:56,160 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:43:56,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:43:56,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:43:56,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:43:56,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:43:56,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:43:56,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:43:56,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:43:56,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:43:56,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:43:56,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:43:56,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:43:56,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:56,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:43:56,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:43:56,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:43:56,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:43:56,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:43:56,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:43:56,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:43:56,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:43:56,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:43:56,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:43:56,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:43:56,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:43:56,450 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:43:56,451 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 15:43:56,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69deeb83d/138ff68529834b619a5ffacbb49c14f6/FLAGe417400c4 [2020-08-21 15:43:57,027 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:43:57,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 15:43:57,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69deeb83d/138ff68529834b619a5ffacbb49c14f6/FLAGe417400c4 [2020-08-21 15:43:57,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69deeb83d/138ff68529834b619a5ffacbb49c14f6 [2020-08-21 15:43:57,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:43:57,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:43:57,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:57,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:43:57,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:43:57,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:57,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4c56ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57, skipping insertion in model container [2020-08-21 15:43:57,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:57,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:43:57,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:43:57,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:57,747 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:43:57,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:57,968 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:43:57,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57 WrapperNode [2020-08-21 15:43:57,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:57,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:43:57,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:43:57,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:43:57,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:57,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:57,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:57,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:58,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:58,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:58,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... [2020-08-21 15:43:58,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:43:58,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:43:58,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:43:58,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:43:58,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:58,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:43:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-21 15:43:58,098 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-21 15:43:58,098 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-21 15:43:58,098 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-21 15:43:58,098 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-21 15:43:58,099 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-21 15:43:58,099 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-21 15:43:58,099 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-21 15:43:58,099 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-21 15:43:58,100 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-21 15:43:58,100 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-21 15:43:58,100 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-21 15:43:58,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:43:58,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:43:58,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-21 15:43:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-21 15:43:58,102 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-21 15:43:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:43:58,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:43:58,338 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,406 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-21 15:43:58,406 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-21 15:43:58,435 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,579 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-21 15:43:58,580 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-21 15:43:58,583 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,625 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 15:43:58,625 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 15:43:58,632 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,695 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 15:43:58,695 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 15:43:58,789 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,806 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-21 15:43:58,806 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-21 15:43:58,828 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 15:43:58,942 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-21 15:43:58,942 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-21 15:43:58,959 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:43:58,960 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:43:58,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:58 BoogieIcfgContainer [2020-08-21 15:43:58,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:43:58,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:43:58,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:43:58,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:43:58,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:43:57" (1/3) ... [2020-08-21 15:43:58,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403b0e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:58, skipping insertion in model container [2020-08-21 15:43:58,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:57" (2/3) ... [2020-08-21 15:43:58,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403b0e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:58, skipping insertion in model container [2020-08-21 15:43:58,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:58" (3/3) ... [2020-08-21 15:43:58,974 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-21 15:43:58,984 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:43:58,992 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:43:59,006 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:43:59,032 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:43:59,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:43:59,032 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:43:59,033 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:43:59,033 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:43:59,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:43:59,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:43:59,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:43:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-21 15:43:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:43:59,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:59,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:59,069 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-21 15:43:59,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:59,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882516053] [2020-08-21 15:43:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:43:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:43:59,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882516053] [2020-08-21 15:43:59,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:43:59,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:43:59,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932014191] [2020-08-21 15:43:59,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:43:59,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:43:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:43:59,555 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-21 15:44:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:00,584 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-21 15:44:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:44:00,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 15:44:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:00,606 INFO L225 Difference]: With dead ends: 418 [2020-08-21 15:44:00,606 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 15:44:00,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:44:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 15:44:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-21 15:44:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-21 15:44:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-21 15:44:00,702 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-21 15:44:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:00,702 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-21 15:44:00,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:44:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-21 15:44:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 15:44:00,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:00,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:00,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:00,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-21 15:44:00,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:00,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134336987] [2020-08-21 15:44:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:00,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134336987] [2020-08-21 15:44:00,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:00,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:44:00,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091016255] [2020-08-21 15:44:00,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:44:00,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:44:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:44:01,000 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-21 15:44:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:02,155 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-21 15:44:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:02,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 15:44:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:02,161 INFO L225 Difference]: With dead ends: 410 [2020-08-21 15:44:02,161 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 15:44:02,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 15:44:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-21 15:44:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 15:44:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-21 15:44:02,245 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-21 15:44:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:02,251 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-21 15:44:02,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:44:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-21 15:44:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 15:44:02,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:02,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:02,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:44:02,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:02,254 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-21 15:44:02,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:02,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033207959] [2020-08-21 15:44:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:02,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033207959] [2020-08-21 15:44:02,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:02,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:44:02,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187021171] [2020-08-21 15:44:02,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:44:02,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:44:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:44:02,487 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-21 15:44:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:03,227 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-21 15:44:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:03,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 15:44:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:03,231 INFO L225 Difference]: With dead ends: 487 [2020-08-21 15:44:03,231 INFO L226 Difference]: Without dead ends: 368 [2020-08-21 15:44:03,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-21 15:44:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-21 15:44:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-21 15:44:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-21 15:44:03,285 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-21 15:44:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:03,285 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-21 15:44:03,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:44:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-21 15:44:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 15:44:03,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:03,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:03,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:44:03,294 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-21 15:44:03,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:03,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896605979] [2020-08-21 15:44:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:03,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896605979] [2020-08-21 15:44:03,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:03,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:44:03,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110716799] [2020-08-21 15:44:03,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:44:03,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:03,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:44:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:44:03,504 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-21 15:44:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:04,196 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-21 15:44:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:04,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-21 15:44:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:04,200 INFO L225 Difference]: With dead ends: 347 [2020-08-21 15:44:04,200 INFO L226 Difference]: Without dead ends: 343 [2020-08-21 15:44:04,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:44:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-21 15:44:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-21 15:44:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-21 15:44:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-21 15:44:04,235 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-21 15:44:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:04,236 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-21 15:44:04,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:44:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-21 15:44:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 15:44:04,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:04,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:04,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:44:04,239 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-21 15:44:04,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:04,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518074045] [2020-08-21 15:44:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:44:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:04,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518074045] [2020-08-21 15:44:04,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:04,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:44:04,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134236322] [2020-08-21 15:44:04,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:44:04,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:44:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:04,414 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-21 15:44:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:05,365 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-21 15:44:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:44:05,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 15:44:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:05,369 INFO L225 Difference]: With dead ends: 394 [2020-08-21 15:44:05,369 INFO L226 Difference]: Without dead ends: 325 [2020-08-21 15:44:05,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:44:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-21 15:44:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-21 15:44:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 15:44:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-21 15:44:05,397 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-21 15:44:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:05,399 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-21 15:44:05,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:44:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-21 15:44:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 15:44:05,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:05,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:05,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:44:05,402 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:05,402 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-21 15:44:05,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:05,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125065953] [2020-08-21 15:44:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:44:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:44:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:05,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125065953] [2020-08-21 15:44:05,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:05,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:44:05,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429155532] [2020-08-21 15:44:05,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:44:05,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:44:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:05,606 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-21 15:44:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:06,104 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-21 15:44:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:44:06,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 15:44:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:06,108 INFO L225 Difference]: With dead ends: 316 [2020-08-21 15:44:06,108 INFO L226 Difference]: Without dead ends: 300 [2020-08-21 15:44:06,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:44:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-21 15:44:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-21 15:44:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-21 15:44:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-21 15:44:06,137 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-21 15:44:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:06,137 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-21 15:44:06,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:44:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-21 15:44:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 15:44:06,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:06,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:06,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:44:06,140 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-21 15:44:06,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:06,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658995922] [2020-08-21 15:44:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:44:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:44:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:06,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658995922] [2020-08-21 15:44:06,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:06,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:44:06,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136577721] [2020-08-21 15:44:06,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:44:06,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:44:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:06,387 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-21 15:44:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:07,273 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-21 15:44:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:44:07,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 15:44:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:07,277 INFO L225 Difference]: With dead ends: 290 [2020-08-21 15:44:07,277 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 15:44:07,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 15:44:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-21 15:44:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 15:44:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-21 15:44:07,308 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-21 15:44:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:07,309 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-21 15:44:07,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:44:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-21 15:44:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 15:44:07,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:07,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:07,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:44:07,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-21 15:44:07,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:07,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992193454] [2020-08-21 15:44:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 15:44:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:44:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 15:44:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:07,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992193454] [2020-08-21 15:44:07,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:07,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:44:07,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356269915] [2020-08-21 15:44:07,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:44:07,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:44:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:07,514 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-21 15:44:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:08,103 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-21 15:44:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:44:08,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-21 15:44:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:08,107 INFO L225 Difference]: With dead ends: 270 [2020-08-21 15:44:08,108 INFO L226 Difference]: Without dead ends: 240 [2020-08-21 15:44:08,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:44:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-21 15:44:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-21 15:44:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 15:44:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-21 15:44:08,126 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-21 15:44:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-21 15:44:08,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:44:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-21 15:44:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 15:44:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:08,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:08,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:44:08,128 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-21 15:44:08,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:08,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033762644] [2020-08-21 15:44:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:44:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:08,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033762644] [2020-08-21 15:44:08,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:08,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:44:08,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779909940] [2020-08-21 15:44:08,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:44:08,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:44:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:08,345 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-21 15:44:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,566 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-21 15:44:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:44:09,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-21 15:44:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,570 INFO L225 Difference]: With dead ends: 313 [2020-08-21 15:44:09,570 INFO L226 Difference]: Without dead ends: 307 [2020-08-21 15:44:09,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:44:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-21 15:44:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-21 15:44:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-21 15:44:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-21 15:44:09,602 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-21 15:44:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,602 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-21 15:44:09,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:44:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-21 15:44:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:44:09,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:09,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:44:09,612 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-21 15:44:09,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707781909] [2020-08-21 15:44:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:44:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707781909] [2020-08-21 15:44:09,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 15:44:09,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976053092] [2020-08-21 15:44:09,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 15:44:09,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 15:44:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:44:09,893 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-21 15:44:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,826 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-21 15:44:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 15:44:11,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-21 15:44:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,829 INFO L225 Difference]: With dead ends: 325 [2020-08-21 15:44:11,829 INFO L226 Difference]: Without dead ends: 284 [2020-08-21 15:44:11,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-21 15:44:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-21 15:44:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-21 15:44:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 15:44:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-21 15:44:11,870 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-21 15:44:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,870 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-21 15:44:11,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 15:44:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-21 15:44:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 15:44:11,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:44:11,873 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-21 15:44:11,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139288085] [2020-08-21 15:44:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:44:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:12,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139288085] [2020-08-21 15:44:12,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:12,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 15:44:12,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112579066] [2020-08-21 15:44:12,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:44:12,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:44:12,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:44:12,161 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-21 15:44:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:13,306 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-21 15:44:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:44:13,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-21 15:44:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:13,309 INFO L225 Difference]: With dead ends: 252 [2020-08-21 15:44:13,310 INFO L226 Difference]: Without dead ends: 211 [2020-08-21 15:44:13,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:44:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-21 15:44:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-21 15:44:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 15:44:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 15:44:13,342 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-21 15:44:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:13,342 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 15:44:13,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:44:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 15:44:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 15:44:13,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:13,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:13,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:44:13,344 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:13,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-21 15:44:13,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:13,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530414002] [2020-08-21 15:44:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:44:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:13,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530414002] [2020-08-21 15:44:13,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:13,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 15:44:13,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854641475] [2020-08-21 15:44:13,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 15:44:13,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 15:44:13,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:44:13,673 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-21 15:44:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:14,776 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-21 15:44:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:44:14,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-21 15:44:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:14,779 INFO L225 Difference]: With dead ends: 227 [2020-08-21 15:44:14,779 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 15:44:14,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:44:14,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 15:44:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 15:44:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 15:44:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-21 15:44:14,800 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-21 15:44:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:14,801 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-21 15:44:14,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 15:44:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-21 15:44:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:44:14,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:14,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:14,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:44:14,803 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-21 15:44:14,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:14,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141519217] [2020-08-21 15:44:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:44:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:44:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:15,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141519217] [2020-08-21 15:44:15,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:15,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 15:44:15,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587472620] [2020-08-21 15:44:15,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:44:15,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:15,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:44:15,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:44:15,035 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-21 15:44:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:15,809 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-21 15:44:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:44:15,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 15:44:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:15,811 INFO L225 Difference]: With dead ends: 296 [2020-08-21 15:44:15,812 INFO L226 Difference]: Without dead ends: 224 [2020-08-21 15:44:15,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:44:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-21 15:44:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-21 15:44:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 15:44:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-21 15:44:15,830 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-21 15:44:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:15,831 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-21 15:44:15,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:44:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-21 15:44:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:44:15,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:15,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:15,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:44:15,833 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-21 15:44:15,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:15,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656650523] [2020-08-21 15:44:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:44:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:44:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:16,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656650523] [2020-08-21 15:44:16,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:16,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 15:44:16,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532124064] [2020-08-21 15:44:16,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:44:16,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:44:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:44:16,047 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-21 15:44:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:16,880 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-21 15:44:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:44:16,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 15:44:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:16,883 INFO L225 Difference]: With dead ends: 232 [2020-08-21 15:44:16,883 INFO L226 Difference]: Without dead ends: 225 [2020-08-21 15:44:16,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-21 15:44:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-21 15:44:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-21 15:44:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 15:44:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-21 15:44:16,901 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-21 15:44:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:16,902 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-21 15:44:16,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:44:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-21 15:44:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 15:44:16,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:16,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:16,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:44:16,904 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-21 15:44:16,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:16,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203334078] [2020-08-21 15:44:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:44:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:44:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:44:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203334078] [2020-08-21 15:44:17,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:17,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:44:17,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889372746] [2020-08-21 15:44:17,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:44:17,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:44:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:44:17,083 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-21 15:44:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:17,710 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-21 15:44:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:17,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-21 15:44:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:17,712 INFO L225 Difference]: With dead ends: 258 [2020-08-21 15:44:17,713 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 15:44:17,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 15:44:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-21 15:44:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 15:44:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-21 15:44:17,736 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-21 15:44:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:17,736 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-21 15:44:17,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:44:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-21 15:44:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 15:44:17,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:17,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:17,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 15:44:17,738 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-21 15:44:17,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:17,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121911492] [2020-08-21 15:44:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:44:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:44:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:44:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:18,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121911492] [2020-08-21 15:44:18,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:18,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 15:44:18,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929883970] [2020-08-21 15:44:18,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 15:44:18,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 15:44:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:44:18,009 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-21 15:44:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:19,185 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-21 15:44:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:44:19,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-21 15:44:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:19,189 INFO L225 Difference]: With dead ends: 226 [2020-08-21 15:44:19,189 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 15:44:19,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:44:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 15:44:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-21 15:44:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 15:44:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-21 15:44:19,204 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-21 15:44:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:19,204 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-21 15:44:19,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 15:44:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-21 15:44:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 15:44:19,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:19,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:19,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 15:44:19,206 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-21 15:44:19,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:19,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197614354] [2020-08-21 15:44:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:44:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:44:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:44:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:19,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197614354] [2020-08-21 15:44:19,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:19,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 15:44:19,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202253053] [2020-08-21 15:44:19,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 15:44:19,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 15:44:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:44:19,475 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-21 15:44:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,219 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-21 15:44:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:44:20,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-21 15:44:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,222 INFO L225 Difference]: With dead ends: 200 [2020-08-21 15:44:20,222 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 15:44:20,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:44:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 15:44:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-21 15:44:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 15:44:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-21 15:44:20,243 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-21 15:44:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,243 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-21 15:44:20,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 15:44:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-21 15:44:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 15:44:20,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 15:44:20,245 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-21 15:44:20,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589365509] [2020-08-21 15:44:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:44:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:44:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589365509] [2020-08-21 15:44:20,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 15:44:20,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156548083] [2020-08-21 15:44:20,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 15:44:20,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 15:44:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:44:20,501 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-21 15:44:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,583 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-21 15:44:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:44:21,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 15:44:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,586 INFO L225 Difference]: With dead ends: 237 [2020-08-21 15:44:21,586 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 15:44:21,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-21 15:44:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 15:44:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-21 15:44:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-21 15:44:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-21 15:44:21,604 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-21 15:44:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-21 15:44:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 15:44:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-21 15:44:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 15:44:21,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 15:44:21,606 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-21 15:44:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347188130] [2020-08-21 15:44:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:44:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:44:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347188130] [2020-08-21 15:44:21,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 15:44:21,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331789929] [2020-08-21 15:44:21,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 15:44:21,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 15:44:21,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:44:21,914 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-21 15:44:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,828 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-21 15:44:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:44:22,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 15:44:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,831 INFO L225 Difference]: With dead ends: 206 [2020-08-21 15:44:22,831 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 15:44:22,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 15:44:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 15:44:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-21 15:44:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 15:44:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-21 15:44:22,851 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-21 15:44:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,852 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-21 15:44:22,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 15:44:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-21 15:44:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 15:44:22,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 15:44:22,854 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-21 15:44:22,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528481491] [2020-08-21 15:44:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:44:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:44:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:44:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:44:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:44:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528481491] [2020-08-21 15:44:23,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:44:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110605590] [2020-08-21 15:44:23,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:44:23,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:44:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:44:23,122 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-21 15:44:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:23,432 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-21 15:44:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:44:23,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-21 15:44:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:23,434 INFO L225 Difference]: With dead ends: 204 [2020-08-21 15:44:23,434 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 15:44:23,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:44:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 15:44:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-21 15:44:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 15:44:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-21 15:44:23,446 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-21 15:44:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:23,447 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-21 15:44:23,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:44:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-21 15:44:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 15:44:23,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:23,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:23,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 15:44:23,449 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:23,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-21 15:44:23,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:23,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502035665] [2020-08-21 15:44:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:44:23,489 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:44:23,490 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:44:23,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 15:44:23,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:23 BoogieIcfgContainer [2020-08-21 15:44:23,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:23,547 INFO L168 Benchmark]: Toolchain (without parser) took 26215.31 ms. Allocated memory was 139.5 MB in the beginning and 521.7 MB in the end (delta: 382.2 MB). Free memory was 101.9 MB in the beginning and 90.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 393.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:23,548 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:44:23,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.93 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.7 MB in the beginning and 175.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:23,551 INFO L168 Benchmark]: Boogie Preprocessor took 76.28 ms. Allocated memory is still 202.4 MB. Free memory was 175.4 MB in the beginning and 171.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:23,551 INFO L168 Benchmark]: RCFGBuilder took 919.31 ms. Allocated memory is still 202.4 MB. Free memory was 171.5 MB in the beginning and 100.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:23,552 INFO L168 Benchmark]: TraceAbstraction took 24573.89 ms. Allocated memory was 202.4 MB in the beginning and 521.7 MB in the end (delta: 319.3 MB). Free memory was 100.0 MB in the beginning and 90.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 328.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:23,558 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 640.93 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.7 MB in the beginning and 175.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.28 ms. Allocated memory is still 202.4 MB. Free memory was 175.4 MB in the beginning and 171.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 919.31 ms. Allocated memory is still 202.4 MB. Free memory was 171.5 MB in the beginning and 100.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24573.89 ms. Allocated memory was 202.4 MB in the beginning and 521.7 MB in the end (delta: 319.3 MB). Free memory was 100.0 MB in the beginning and 90.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 328.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1011]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int KernelMode ; [L22] int Executive ; [L23] int DevicePowerState ; [L24] int s ; [L25] int UNLOADED ; [L26] int NP ; [L27] int DC ; [L28] int SKIP1 ; [L29] int SKIP2 ; [L30] int MPR1 ; [L31] int MPR3 ; [L32] int IPC ; [L33] int pended ; [L34] int compFptr ; [L35] int compRegistered ; [L36] int lowerDriverReturn ; [L37] int setEventCalled ; [L38] int customIrp ; [L39] int myStatus ; [L292] int status ; [L293] int irp = __VERIFIER_nondet_int() ; [L294] int pirp ; [L295] int pirp__IoStatus__Status ; [L296] int irp_choice = __VERIFIER_nondet_int() ; [L297] int devobj = __VERIFIER_nondet_int() ; [L298] int __cil_tmp8 ; [L300] KernelMode = 0 [L301] Executive = 0 [L302] DevicePowerState = 1 [L303] s = 0 [L304] UNLOADED = 0 [L305] NP = 0 [L306] DC = 0 [L307] SKIP1 = 0 [L308] SKIP2 = 0 [L309] MPR1 = 0 [L310] MPR3 = 0 [L311] IPC = 0 [L312] pended = 0 [L313] compFptr = 0 [L314] compRegistered = 0 [L315] lowerDriverReturn = 0 [L316] setEventCalled = 0 [L317] customIrp = 0 [L318] myStatus = 0 [L322] status = 0 [L323] pirp = irp [L324] CALL _BLAST_init() [L59] UNLOADED = 0 [L60] NP = 1 [L61] DC = 2 [L62] SKIP1 = 3 [L63] SKIP2 = 4 [L64] MPR1 = 5 [L65] MPR3 = 6 [L66] IPC = 7 [L67] s = UNLOADED [L68] pended = 0 [L69] compFptr = 0 [L70] compRegistered = 0 [L71] lowerDriverReturn = 0 [L72] setEventCalled = 0 [L73] customIrp = 0 [L324] RET _BLAST_init() [L326] COND TRUE status >= 0 [L327] s = NP [L328] customIrp = 0 [L329] setEventCalled = customIrp [L330] lowerDriverReturn = setEventCalled [L331] compRegistered = lowerDriverReturn [L332] pended = compRegistered [L333] pirp__IoStatus__Status = 0 [L334] myStatus = 0 [L335] COND FALSE !(irp_choice == 0) [L340] CALL stub_driver_init() [L45] s = NP [L46] pended = 0 [L47] compFptr = 0 [L48] compRegistered = 0 [L49] lowerDriverReturn = 0 [L50] setEventCalled = 0 [L51] customIrp = 0 [L340] RET stub_driver_init() [L343] COND FALSE !(status < 0) [L347] int tmp_ndt_1; [L348] tmp_ndt_1 = __VERIFIER_nondet_int() [L349] COND FALSE !(tmp_ndt_1 == 0) [L352] int tmp_ndt_2; [L353] tmp_ndt_2 = __VERIFIER_nondet_int() [L354] COND FALSE !(tmp_ndt_2 == 1) [L357] int tmp_ndt_3; [L358] tmp_ndt_3 = __VERIFIER_nondet_int() [L359] COND TRUE tmp_ndt_3 == 3 [L386] CALL, EXPR KbFilter_PnP(devobj, pirp) [L78] int devExt ; [L79] int irpStack ; [L80] int status ; [L81] int event = __VERIFIER_nondet_int() ; [L82] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L83] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L84] int irpStack__MinorFunction = __VERIFIER_nondet_int() ; [L85] int devExt__TopOfStack = __VERIFIER_nondet_int() ; [L86] int devExt__Started ; [L87] int devExt__Removed ; [L88] int devExt__SurpriseRemoved ; [L89] int Irp__IoStatus__Status ; [L90] int Irp__IoStatus__Information ; [L91] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L92] int irpSp ; [L93] int nextIrpSp ; [L94] int nextIrpSp__Control ; [L95] int irpSp___0 ; [L96] int irpSp__Context ; [L97] int irpSp__Control ; [L98] long __cil_tmp23 ; [L101] status = 0 [L102] devExt = DeviceObject__DeviceExtension [L103] irpStack = Irp__Tail__Overlay__CurrentStackLocation [L104] COND FALSE !(irpStack__MinorFunction == 0) [L107] COND FALSE !(irpStack__MinorFunction == 23) [L110] COND TRUE irpStack__MinorFunction == 2 [L234] devExt__Removed = 1 [L235] COND TRUE s == NP [L236] s = SKIP1 [L243] Irp__CurrentLocation ++ [L244] Irp__Tail__Overlay__CurrentStackLocation ++ [L245] CALL IofCallDriver(devExt__TopOfStack, Irp) [L481] int returnVal2 ; [L482] int compRetStatus ; [L483] int lcontext = __VERIFIER_nondet_int() ; [L484] long long __cil_tmp7 ; [L487] COND FALSE !(\read(compRegistered)) [L500] int tmp_ndt_6; [L501] tmp_ndt_6 = __VERIFIER_nondet_int() [L502] COND FALSE !(tmp_ndt_6 == 0) [L505] int tmp_ndt_7; [L506] tmp_ndt_7 = __VERIFIER_nondet_int() [L507] COND TRUE tmp_ndt_7 == 1 [L516] returnVal2 = -1073741823 [L526] COND FALSE !(s == NP) [L530] COND FALSE !(s == MPR1) [L539] COND TRUE s == SKIP1 [L540] s = SKIP2 [L541] lowerDriverReturn = returnVal2 [L549] return (returnVal2); [L245] RET IofCallDriver(devExt__TopOfStack, Irp) [L246] status = 0 [L288] return (status); [L386] RET, EXPR KbFilter_PnP(devobj, pirp) [L386] status = KbFilter_PnP(devobj, pirp) [L410] COND FALSE !(pended == 1) [L418] COND FALSE !(pended == 1) [L426] COND TRUE s != UNLOADED [L427] COND TRUE status != -1 [L428] COND FALSE !(s != SKIP2) [L438] COND FALSE !(pended == 1) [L445] COND FALSE !(s == DC) [L450] COND TRUE status != lowerDriverReturn [L451] CALL errorFn() [L1011] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 18 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.4s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4631 SDtfs, 6125 SDslu, 7822 SDs, 0 SdLazy, 16030 SolverSat, 1270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1029 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 212124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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...