/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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 [2020-08-22 01:25:22,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:25:22,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:25:22,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:25:22,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:25:22,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:25:22,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:25:22,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:25:22,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:25:22,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:25:22,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:25:22,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:25:22,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:25:22,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:25:22,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:25:22,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:25:22,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:25:22,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:25:22,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:25:22,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:25:22,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:25:22,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:25:22,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:25:22,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:25:22,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:25:22,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:25:22,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:25:22,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:25:22,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:25:22,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:25:22,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:25:22,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:25:22,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:25:22,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:25:22,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:25:22,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:25:22,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:25:22,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:25:22,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:25:22,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:25:22,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:25:22,474 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 [2020-08-22 01:25:22,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:25:22,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:25:22,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:25:22,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:25:22,517 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:25:22,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:25:22,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:25:22,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:25:22,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:25:22,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:25:22,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:25:22,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:25:22,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:25:22,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:25:22,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:25:22,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:25:22,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:25:22,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:25:22,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:25:22,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:25:22,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:25:22,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:22,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:25:22,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:25:22,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:25:22,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:25:22,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:25:22,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:25:22,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:25:22,523 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:25:22,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:25:22,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:25:22,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:25:22,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:25:22,897 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:25:22,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-22 01:25:22,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c763161/54991d35f1f945a6971fc355620aee1f/FLAG265d69072 [2020-08-22 01:25:23,532 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:25:23,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-22 01:25:23,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c763161/54991d35f1f945a6971fc355620aee1f/FLAG265d69072 [2020-08-22 01:25:23,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65c763161/54991d35f1f945a6971fc355620aee1f [2020-08-22 01:25:23,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:25:23,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:25:23,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:23,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:25:23,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:25:23,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:23" (1/1) ... [2020-08-22 01:25:24,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7cadc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:23, skipping insertion in model container [2020-08-22 01:25:24,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:23" (1/1) ... [2020-08-22 01:25:24,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:25:24,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:25:24,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:24,401 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:25:24,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:24,597 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:25:24,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24 WrapperNode [2020-08-22 01:25:24,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:24,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:25:24,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:25:24,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:25:24,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (1/1) ... [2020-08-22 01:25:24,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:25:24,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:25:24,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:25:24,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:25:24,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (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 [2020-08-22 01:25:24,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:25:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:25:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-22 01:25:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-22 01:25:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-22 01:25:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:25:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-22 01:25:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-22 01:25:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-22 01:25:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-22 01:25:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-22 01:25:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-22 01:25:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-22 01:25:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-22 01:25:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-22 01:25:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-22 01:25:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-22 01:25:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-22 01:25:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:25:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:25:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:25:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-22 01:25:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-22 01:25:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-22 01:25:24,753 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-22 01:25:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-22 01:25:24,754 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-22 01:25:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-22 01:25:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-22 01:25:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-22 01:25:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-22 01:25:24,755 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-22 01:25:24,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:25:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:25:25,032 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,118 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-22 01:25:25,119 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-22 01:25:25,150 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,401 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-22 01:25:25,402 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-22 01:25:25,404 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,461 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-22 01:25:25,462 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-22 01:25:25,469 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,516 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-22 01:25:25,517 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-22 01:25:25,612 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,640 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-22 01:25:25,640 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-22 01:25:25,669 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 01:25:25,798 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-22 01:25:25,798 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-22 01:25:25,828 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:25:25,829 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:25:25,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:25 BoogieIcfgContainer [2020-08-22 01:25:25,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:25:25,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:25:25,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:25:25,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:25:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:25:23" (1/3) ... [2020-08-22 01:25:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e411b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:25, skipping insertion in model container [2020-08-22 01:25:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:24" (2/3) ... [2020-08-22 01:25:25,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e411b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:25, skipping insertion in model container [2020-08-22 01:25:25,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:25" (3/3) ... [2020-08-22 01:25:25,853 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-22 01:25:25,867 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:25:25,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:25:25,902 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:25:25,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:25:25,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:25:25,936 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:25:25,936 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:25:25,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:25:25,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:25:25,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:25:25,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:25:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-22 01:25:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:25,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:25,966 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] [2020-08-22 01:25:25,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-22 01:25:25,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:25,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424592022] [2020-08-22 01:25:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:26,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424592022] [2020-08-22 01:25:26,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:26,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:25:26,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416548342] [2020-08-22 01:25:26,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:25:26,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:26,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:25:26,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:25:26,521 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-22 01:25:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:27,808 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-22 01:25:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:25:27,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 01:25:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:27,826 INFO L225 Difference]: With dead ends: 418 [2020-08-22 01:25:27,826 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 01:25:27,833 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 [2020-08-22 01:25:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 01:25:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-22 01:25:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 01:25:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-22 01:25:27,916 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-22 01:25:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:27,917 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-22 01:25:27,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:25:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-22 01:25:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:25:27,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:27,919 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] [2020-08-22 01:25:27,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:25:27,920 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-22 01:25:27,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:27,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006361811] [2020-08-22 01:25:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:28,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006361811] [2020-08-22 01:25:28,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:28,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:25:28,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108895063] [2020-08-22 01:25:28,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:25:28,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:25:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:25:28,218 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-22 01:25:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:29,450 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-22 01:25:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:25:29,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 01:25:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:29,458 INFO L225 Difference]: With dead ends: 410 [2020-08-22 01:25:29,459 INFO L226 Difference]: Without dead ends: 349 [2020-08-22 01:25:29,462 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 [2020-08-22 01:25:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-22 01:25:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-22 01:25:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 01:25:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-22 01:25:29,537 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-22 01:25:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:29,538 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-22 01:25:29,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:25:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-22 01:25:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:25:29,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:29,540 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] [2020-08-22 01:25:29,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:25:29,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-22 01:25:29,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:29,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902579092] [2020-08-22 01:25:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:29,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902579092] [2020-08-22 01:25:29,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:29,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:25:29,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728945412] [2020-08-22 01:25:29,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:25:29,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:29,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:25:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:25:29,685 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-22 01:25:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:30,600 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-22 01:25:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:25:30,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 01:25:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:30,608 INFO L225 Difference]: With dead ends: 487 [2020-08-22 01:25:30,608 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 01:25:30,609 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 [2020-08-22 01:25:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 01:25:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-22 01:25:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 01:25:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-22 01:25:30,662 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-22 01:25:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:30,663 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-22 01:25:30,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:25:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-22 01:25:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 01:25:30,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:30,674 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] [2020-08-22 01:25:30,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:25:30,675 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-22 01:25:30,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:30,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498355281] [2020-08-22 01:25:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:30,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498355281] [2020-08-22 01:25:30,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:30,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:25:30,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416122874] [2020-08-22 01:25:30,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:25:30,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:25:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:25:30,864 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-22 01:25:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:31,675 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-22 01:25:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:25:31,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 01:25:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:31,680 INFO L225 Difference]: With dead ends: 347 [2020-08-22 01:25:31,680 INFO L226 Difference]: Without dead ends: 343 [2020-08-22 01:25:31,681 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 [2020-08-22 01:25:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-22 01:25:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-22 01:25:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-22 01:25:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-22 01:25:31,709 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-22 01:25:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:31,709 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-22 01:25:31,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:25:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-22 01:25:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 01:25:31,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:31,712 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] [2020-08-22 01:25:31,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:25:31,713 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-22 01:25:31,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547488589] [2020-08-22 01:25:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:25:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:31,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547488589] [2020-08-22 01:25:31,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:31,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:25:31,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390696123] [2020-08-22 01:25:31,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:31,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:31,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:31,908 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-22 01:25:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:33,198 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-22 01:25:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:25:33,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-22 01:25:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:33,201 INFO L225 Difference]: With dead ends: 394 [2020-08-22 01:25:33,202 INFO L226 Difference]: Without dead ends: 325 [2020-08-22 01:25:33,203 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 [2020-08-22 01:25:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-22 01:25:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-22 01:25:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 01:25:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-22 01:25:33,225 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-22 01:25:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:33,226 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-22 01:25:33,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-22 01:25:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 01:25:33,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:33,228 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] [2020-08-22 01:25:33,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:25:33,228 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-22 01:25:33,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:33,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13083055] [2020-08-22 01:25:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:25:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 01:25:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:33,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13083055] [2020-08-22 01:25:33,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:33,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:25:33,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993031347] [2020-08-22 01:25:33,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:33,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:33,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:33,401 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-22 01:25:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:33,860 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-22 01:25:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:25:33,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-22 01:25:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:33,864 INFO L225 Difference]: With dead ends: 316 [2020-08-22 01:25:33,864 INFO L226 Difference]: Without dead ends: 300 [2020-08-22 01:25:33,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:25:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-22 01:25:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-22 01:25:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-22 01:25:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-22 01:25:33,906 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-22 01:25:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:33,906 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-22 01:25:33,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-22 01:25:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 01:25:33,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:33,908 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] [2020-08-22 01:25:33,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:25:33,909 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-22 01:25:33,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:33,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748326891] [2020-08-22 01:25:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:25:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 01:25:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:34,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748326891] [2020-08-22 01:25:34,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:34,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:25:34,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424268342] [2020-08-22 01:25:34,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:34,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:34,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:34,097 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-22 01:25:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:34,992 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-22 01:25:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:25:34,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-22 01:25:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:34,996 INFO L225 Difference]: With dead ends: 290 [2020-08-22 01:25:34,996 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 01:25:34,997 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 [2020-08-22 01:25:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 01:25:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-22 01:25:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-22 01:25:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-22 01:25:35,020 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-22 01:25:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:35,020 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-22 01:25:35,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-22 01:25:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:25:35,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:35,023 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] [2020-08-22 01:25:35,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:25:35,023 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-22 01:25:35,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:35,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505847326] [2020-08-22 01:25:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,212 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-08-22 01:25:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 01:25:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:25:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:25:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:35,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505847326] [2020-08-22 01:25:35,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:35,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:25:35,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608314733] [2020-08-22 01:25:35,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:35,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:35,338 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-22 01:25:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:35,951 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-22 01:25:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:25:35,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-22 01:25:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:35,957 INFO L225 Difference]: With dead ends: 270 [2020-08-22 01:25:35,957 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 01:25:35,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:25:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 01:25:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-22 01:25:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 01:25:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-22 01:25:35,982 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-22 01:25:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:35,983 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-22 01:25:35,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-22 01:25:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:25:35,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:35,984 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] [2020-08-22 01:25:35,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:25:35,985 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-22 01:25:35,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:35,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656839661] [2020-08-22 01:25:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:25:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:36,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656839661] [2020-08-22 01:25:36,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:36,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 01:25:36,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537484670] [2020-08-22 01:25:36,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:25:36,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:25:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:25:36,236 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-22 01:25:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:37,726 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-22 01:25:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:25:37,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-22 01:25:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:37,731 INFO L225 Difference]: With dead ends: 313 [2020-08-22 01:25:37,732 INFO L226 Difference]: Without dead ends: 307 [2020-08-22 01:25:37,732 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 [2020-08-22 01:25:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-22 01:25:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-22 01:25:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-22 01:25:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-22 01:25:37,762 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-22 01:25:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:37,763 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-22 01:25:37,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:25:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-22 01:25:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 01:25:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:37,768 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] [2020-08-22 01:25:37,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:37,769 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-22 01:25:37,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:37,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625683800] [2020-08-22 01:25:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:25:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:38,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625683800] [2020-08-22 01:25:38,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:38,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 01:25:38,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476512039] [2020-08-22 01:25:38,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:25:38,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:25:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:25:38,137 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-22 01:25:38,450 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-08-22 01:25:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,334 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-22 01:25:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:25:40,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-22 01:25:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,337 INFO L225 Difference]: With dead ends: 325 [2020-08-22 01:25:40,337 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 01:25:40,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:25:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 01:25:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-22 01:25:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 01:25:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-22 01:25:40,377 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-22 01:25:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,378 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-22 01:25:40,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:25:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-22 01:25:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:25:40,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,379 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] [2020-08-22 01:25:40,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:40,380 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-22 01:25:40,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411059121] [2020-08-22 01:25:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:25:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411059121] [2020-08-22 01:25:40,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 01:25:40,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556381090] [2020-08-22 01:25:40,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:25:40,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:25:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:25:40,618 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-22 01:25:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,797 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-22 01:25:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:25:41,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-22 01:25:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,800 INFO L225 Difference]: With dead ends: 252 [2020-08-22 01:25:41,800 INFO L226 Difference]: Without dead ends: 211 [2020-08-22 01:25:41,801 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 [2020-08-22 01:25:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-22 01:25:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-22 01:25:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 01:25:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-22 01:25:41,819 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-22 01:25:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,819 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-22 01:25:41,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:25:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-22 01:25:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:25:41,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,820 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] [2020-08-22 01:25:41,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:41,821 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-22 01:25:41,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357016337] [2020-08-22 01:25:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 01:25:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:42,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357016337] [2020-08-22 01:25:42,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:42,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 01:25:42,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683710759] [2020-08-22 01:25:42,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:25:42,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:25:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:25:42,120 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-22 01:25:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:43,338 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-22 01:25:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:25:43,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-22 01:25:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:43,340 INFO L225 Difference]: With dead ends: 227 [2020-08-22 01:25:43,340 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 01:25:43,342 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 [2020-08-22 01:25:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 01:25:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-22 01:25:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 01:25:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-22 01:25:43,360 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-22 01:25:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:43,360 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-22 01:25:43,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:25:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-22 01:25:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:25:43,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:43,362 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] [2020-08-22 01:25:43,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:43,363 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-22 01:25:43,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:43,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499473814] [2020-08-22 01:25:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:25:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:25:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:43,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499473814] [2020-08-22 01:25:43,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:43,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 01:25:43,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361126305] [2020-08-22 01:25:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:25:43,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:25:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:25:43,611 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-22 01:25:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:44,538 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-22 01:25:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:25:44,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-22 01:25:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:44,541 INFO L225 Difference]: With dead ends: 296 [2020-08-22 01:25:44,541 INFO L226 Difference]: Without dead ends: 224 [2020-08-22 01:25:44,542 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 [2020-08-22 01:25:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-22 01:25:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-22 01:25:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 01:25:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-22 01:25:44,563 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-22 01:25:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:44,565 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-22 01:25:44,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:25:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-22 01:25:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:25:44,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:44,569 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] [2020-08-22 01:25:44,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:44,569 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-22 01:25:44,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:44,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156315040] [2020-08-22 01:25:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:25:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:25:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:44,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156315040] [2020-08-22 01:25:44,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:44,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 01:25:44,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289742611] [2020-08-22 01:25:44,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:25:44,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:25:44,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:25:44,852 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-22 01:25:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,802 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-22 01:25:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:25:45,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-22 01:25:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,805 INFO L225 Difference]: With dead ends: 232 [2020-08-22 01:25:45,805 INFO L226 Difference]: Without dead ends: 225 [2020-08-22 01:25:45,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:25:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-22 01:25:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-22 01:25:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 01:25:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-22 01:25:45,826 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-22 01:25:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,827 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-22 01:25:45,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:25:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-22 01:25:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:25:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,830 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] [2020-08-22 01:25:45,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:45,830 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-22 01:25:45,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134585968] [2020-08-22 01:25:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:25:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 01:25:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:25:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134585968] [2020-08-22 01:25:46,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:25:46,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553480096] [2020-08-22 01:25:46,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:46,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:46,088 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-22 01:25:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,781 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-22 01:25:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:25:46,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-22 01:25:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,783 INFO L225 Difference]: With dead ends: 258 [2020-08-22 01:25:46,783 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 01:25:46,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:25:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 01:25:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-22 01:25:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 01:25:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-22 01:25:46,805 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-22 01:25:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,805 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-22 01:25:46,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-22 01:25:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 01:25:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,807 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] [2020-08-22 01:25:46,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:46,807 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-22 01:25:46,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54834522] [2020-08-22 01:25:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:25:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:25:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:47,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54834522] [2020-08-22 01:25:47,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 01:25:47,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867527787] [2020-08-22 01:25:47,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:25:47,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:25:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:25:47,103 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-22 01:25:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,513 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-22 01:25:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:25:48,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-22 01:25:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,515 INFO L225 Difference]: With dead ends: 226 [2020-08-22 01:25:48,515 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 01:25:48,516 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 [2020-08-22 01:25:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 01:25:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-22 01:25:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 01:25:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-22 01:25:48,539 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-22 01:25:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,539 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-22 01:25:48,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:25:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-22 01:25:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:25:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,541 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] [2020-08-22 01:25:48,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:48,541 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-22 01:25:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198771867] [2020-08-22 01:25:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:25:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 01:25:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:25:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:48,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198771867] [2020-08-22 01:25:48,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 01:25:48,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267653991] [2020-08-22 01:25:48,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:25:48,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:25:48,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:25:48,888 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-22 01:25:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:49,738 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-22 01:25:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:25:49,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-22 01:25:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,740 INFO L225 Difference]: With dead ends: 200 [2020-08-22 01:25:49,741 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 01:25:49,741 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 [2020-08-22 01:25:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 01:25:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-22 01:25:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 01:25:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-22 01:25:49,760 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-22 01:25:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,761 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-22 01:25:49,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:25:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-22 01:25:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 01:25:49,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,762 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] [2020-08-22 01:25:49,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:49,762 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-22 01:25:49,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517891811] [2020-08-22 01:25:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 01:25:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:25:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:50,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517891811] [2020-08-22 01:25:50,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:50,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 01:25:50,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811264857] [2020-08-22 01:25:50,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:25:50,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:25:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:25:50,020 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-22 01:25:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:51,205 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-22 01:25:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:25:51,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-22 01:25:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:51,207 INFO L225 Difference]: With dead ends: 237 [2020-08-22 01:25:51,207 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 01:25:51,208 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 [2020-08-22 01:25:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 01:25:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-22 01:25:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-22 01:25:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-22 01:25:51,247 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-22 01:25:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:51,247 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-22 01:25:51,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:25:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-22 01:25:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 01:25:51,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:51,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:51,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:51,253 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-22 01:25:51,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:51,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143844584] [2020-08-22 01:25:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 01:25:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:25:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:51,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143844584] [2020-08-22 01:25:51,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:51,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 01:25:51,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429823042] [2020-08-22 01:25:51,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:25:51,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:25:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:25:51,491 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-22 01:25:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:52,393 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-22 01:25:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:25:52,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-22 01:25:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:52,395 INFO L225 Difference]: With dead ends: 206 [2020-08-22 01:25:52,395 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 01:25:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:25:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 01:25:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-22 01:25:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 01:25:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-22 01:25:52,408 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-22 01:25:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:52,409 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-22 01:25:52,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:25:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-22 01:25:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:25:52,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:52,410 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] [2020-08-22 01:25:52,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:52,410 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-22 01:25:52,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:52,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016661327] [2020-08-22 01:25:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:25:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:25:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:25:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:25:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:52,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016661327] [2020-08-22 01:25:52,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:52,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 01:25:52,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848150769] [2020-08-22 01:25:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:25:52,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:25:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:25:52,685 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-22 01:25:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:53,047 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-22 01:25:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:25:53,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-22 01:25:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:53,049 INFO L225 Difference]: With dead ends: 204 [2020-08-22 01:25:53,049 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 01:25:53,049 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 [2020-08-22 01:25:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 01:25:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-22 01:25:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 01:25:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-22 01:25:53,065 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-22 01:25:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:53,066 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-22 01:25:53,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:25:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-22 01:25:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:25:53,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:53,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:53,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:53,069 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-22 01:25:53,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:53,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466907847] [2020-08-22 01:25:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:25:53,119 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:25:53,119 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:25:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:25:53,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:25:53 BoogieIcfgContainer [2020-08-22 01:25:53,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:25:53,185 INFO L168 Benchmark]: Toolchain (without parser) took 29185.79 ms. Allocated memory was 146.8 MB in the beginning and 526.4 MB in the end (delta: 379.6 MB). Free memory was 101.4 MB in the beginning and 87.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 393.8 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,188 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 606.13 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 101.2 MB in the beginning and 174.2 MB in the end (delta: -73.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,189 INFO L168 Benchmark]: Boogie Preprocessor took 71.71 ms. Allocated memory is still 201.9 MB. Free memory was 174.2 MB in the beginning and 171.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,190 INFO L168 Benchmark]: RCFGBuilder took 1171.42 ms. Allocated memory is still 201.9 MB. Free memory was 171.5 MB in the beginning and 99.8 MB in the end (delta: 71.7 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,191 INFO L168 Benchmark]: TraceAbstraction took 27330.05 ms. Allocated memory was 201.9 MB in the beginning and 526.4 MB in the end (delta: 324.5 MB). Free memory was 99.8 MB in the beginning and 87.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 337.2 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,202 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 606.13 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 101.2 MB in the beginning and 174.2 MB in the end (delta: -73.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.71 ms. Allocated memory is still 201.9 MB. Free memory was 174.2 MB in the beginning and 171.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1171.42 ms. Allocated memory is still 201.9 MB. Free memory was 171.5 MB in the beginning and 99.8 MB in the end (delta: 71.7 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27330.05 ms. Allocated memory was 201.9 MB in the beginning and 526.4 MB in the end (delta: 324.5 MB). Free memory was 99.8 MB in the beginning and 87.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 337.2 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: 27.1s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4637 SDtfs, 6117 SDslu, 7840 SDs, 0 SdLazy, 16057 SolverSat, 1267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.2s 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: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.4s 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...