/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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:10:49,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:10:49,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:10:49,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:10:49,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:10:49,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:10:49,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:10:49,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:10:49,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:10:49,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:10:49,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:10:49,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:10:49,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:10:49,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:10:49,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:10:49,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:10:49,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:10:49,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:10:49,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:10:49,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:10:49,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:10:49,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:10:49,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:10:49,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:10:49,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:10:49,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:10:49,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:10:49,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:10:49,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:10:49,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:10:49,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:10:49,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:10:49,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:10:49,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:10:49,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:10:49,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:10:49,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:10:49,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:10:49,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:10:49,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:10:49,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:10:49,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:10:50,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:10:50,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:10:50,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:10:50,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:10:50,023 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:10:50,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:10:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:10:50,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:10:50,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:10:50,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:10:50,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:10:50,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:10:50,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:10:50,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:10:50,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:10:50,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:10:50,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:10:50,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:10:50,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:10:50,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:10:50,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:10:50,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:50,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:10:50,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:10:50,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:10:50,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:10:50,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:10:50,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:10:50,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:10:50,028 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:10:50,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:10:50,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:10:50,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:10:50,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:10:50,360 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:10:50,361 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 22:10:50,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b11e35927/f4b7814f76f54f8b8cb58c1385d5d918/FLAGdedad97f7 [2020-08-21 22:10:50,918 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:10:50,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 22:10:50,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b11e35927/f4b7814f76f54f8b8cb58c1385d5d918/FLAGdedad97f7 [2020-08-21 22:10:51,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b11e35927/f4b7814f76f54f8b8cb58c1385d5d918 [2020-08-21 22:10:51,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:10:51,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:10:51,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:51,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:10:51,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:10:51,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2362c63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51, skipping insertion in model container [2020-08-21 22:10:51,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:10:51,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:10:51,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:51,706 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:10:51,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:51,930 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:10:51,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51 WrapperNode [2020-08-21 22:10:51,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:51,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:10:51,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:10:51,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:10:51,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:51,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... [2020-08-21 22:10:52,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:10:52,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:10:52,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:10:52,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:10:52,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:52,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:10:52,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:10:52,074 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-21 22:10:52,074 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-21 22:10:52,074 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-21 22:10:52,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:10:52,075 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-21 22:10:52,075 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-21 22:10:52,076 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-21 22:10:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-21 22:10:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-21 22:10:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-21 22:10:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-21 22:10:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-21 22:10:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-21 22:10:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-21 22:10:52,079 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-21 22:10:52,079 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-21 22:10:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:10:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 22:10:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:10:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 22:10:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-21 22:10:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-21 22:10:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-21 22:10:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-21 22:10:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-21 22:10:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-21 22:10:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-21 22:10:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-21 22:10:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-21 22:10:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-21 22:10:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:10:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:10:52,346 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,414 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-21 22:10:52,414 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-21 22:10:52,444 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,569 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-21 22:10:52,570 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-21 22:10:52,572 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,614 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 22:10:52,614 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 22:10:52,621 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,679 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 22:10:52,680 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 22:10:52,777 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,809 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-21 22:10:52,810 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-21 22:10:52,838 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 22:10:52,937 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-21 22:10:52,937 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-21 22:10:52,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:10:52,957 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:10:52,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:52 BoogieIcfgContainer [2020-08-21 22:10:52,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:10:52,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:10:52,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:10:52,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:10:52,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:10:51" (1/3) ... [2020-08-21 22:10:52,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2c5c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:52, skipping insertion in model container [2020-08-21 22:10:52,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:51" (2/3) ... [2020-08-21 22:10:52,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2c5c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:52, skipping insertion in model container [2020-08-21 22:10:52,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:52" (3/3) ... [2020-08-21 22:10:52,973 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-21 22:10:52,984 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:10:52,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:10:53,009 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:10:53,037 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:10:53,037 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:10:53,037 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:10:53,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:10:53,038 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:10:53,038 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:10:53,038 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:10:53,038 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:10:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-21 22:10:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:10:53,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:53,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:53,075 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-21 22:10:53,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:53,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705893928] [2020-08-21 22:10:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:53,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:53,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:10:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:53,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705893928] [2020-08-21 22:10:53,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:53,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:53,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721442] [2020-08-21 22:10:53,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:53,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:53,559 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-21 22:10:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:54,605 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-21 22:10:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:54,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 22:10:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:54,623 INFO L225 Difference]: With dead ends: 418 [2020-08-21 22:10:54,624 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 22:10:54,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 22:10:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-21 22:10:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-21 22:10:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-21 22:10:54,708 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-21 22:10:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:54,709 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-21 22:10:54,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-21 22:10:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:10:54,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:54,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:54,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:10:54,712 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-21 22:10:54,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:54,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169389786] [2020-08-21 22:10:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:54,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:10:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:54,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:10:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:54,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169389786] [2020-08-21 22:10:54,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:54,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:10:54,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277907197] [2020-08-21 22:10:54,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:10:54,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:10:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:10:54,969 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-21 22:10:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:56,278 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-21 22:10:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:10:56,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 22:10:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:56,285 INFO L225 Difference]: With dead ends: 410 [2020-08-21 22:10:56,286 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 22:10:56,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 22:10:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-21 22:10:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 22:10:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-21 22:10:56,378 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-21 22:10:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:56,379 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-21 22:10:56,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:10:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-21 22:10:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:10:56,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:56,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:56,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:10:56,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:56,383 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-21 22:10:56,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:56,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779889116] [2020-08-21 22:10:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:56,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:56,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:10:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:56,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:10:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:56,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779889116] [2020-08-21 22:10:56,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:56,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:10:56,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26795041] [2020-08-21 22:10:56,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:10:56,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:56,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:10:56,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:10:56,611 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-21 22:10:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:57,481 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-21 22:10:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:10:57,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 22:10:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:57,488 INFO L225 Difference]: With dead ends: 487 [2020-08-21 22:10:57,488 INFO L226 Difference]: Without dead ends: 368 [2020-08-21 22:10:57,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-21 22:10:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-21 22:10:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-21 22:10:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-21 22:10:57,544 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-21 22:10:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:57,545 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-21 22:10:57,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:10:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-21 22:10:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 22:10:57,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:57,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:57,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:10:57,557 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-21 22:10:57,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:57,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114889486] [2020-08-21 22:10:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:57,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:10:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:57,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:10:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:57,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114889486] [2020-08-21 22:10:57,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:57,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:10:57,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199847953] [2020-08-21 22:10:57,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:10:57,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:10:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:10:57,763 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-21 22:10:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:58,575 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-21 22:10:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:10:58,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-21 22:10:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:58,579 INFO L225 Difference]: With dead ends: 347 [2020-08-21 22:10:58,580 INFO L226 Difference]: Without dead ends: 343 [2020-08-21 22:10:58,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:10:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-21 22:10:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-21 22:10:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-21 22:10:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-21 22:10:58,618 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-21 22:10:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:58,619 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-21 22:10:58,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:10:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-21 22:10:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 22:10:58,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:58,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:58,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:10:58,627 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-21 22:10:58,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:58,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508519348] [2020-08-21 22:10:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:10:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:58,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:10:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:58,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:10:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:58,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508519348] [2020-08-21 22:10:58,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:58,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:10:58,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030736538] [2020-08-21 22:10:58,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:10:58,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:10:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:58,853 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-21 22:10:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:59,890 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-21 22:10:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:10:59,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 22:10:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:59,894 INFO L225 Difference]: With dead ends: 394 [2020-08-21 22:10:59,894 INFO L226 Difference]: Without dead ends: 325 [2020-08-21 22:10:59,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:10:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-21 22:10:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-21 22:10:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 22:10:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-21 22:10:59,920 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-21 22:10:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:59,920 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-21 22:10:59,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:10:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-21 22:10:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 22:10:59,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:59,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:59,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:10:59,923 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-21 22:10:59,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:59,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005009370] [2020-08-21 22:10:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:11:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:11:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:00,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005009370] [2020-08-21 22:11:00,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:00,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:11:00,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949553306] [2020-08-21 22:11:00,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:11:00,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:00,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:11:00,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:11:00,103 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-21 22:11:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:00,574 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-21 22:11:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:11:00,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 22:11:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:00,577 INFO L225 Difference]: With dead ends: 316 [2020-08-21 22:11:00,577 INFO L226 Difference]: Without dead ends: 300 [2020-08-21 22:11:00,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:11:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-21 22:11:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-21 22:11:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-21 22:11:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-21 22:11:00,599 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-21 22:11:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:00,600 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-21 22:11:00,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:11:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-21 22:11:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 22:11:00,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:00,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:00,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:11:00,602 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-21 22:11:00,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:00,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850839763] [2020-08-21 22:11:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:11:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:11:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:00,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850839763] [2020-08-21 22:11:00,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:00,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:11:00,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46520507] [2020-08-21 22:11:00,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:11:00,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:11:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:11:00,807 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-21 22:11:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:01,738 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-21 22:11:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:11:01,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 22:11:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:01,741 INFO L225 Difference]: With dead ends: 290 [2020-08-21 22:11:01,743 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 22:11:01,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:11:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 22:11:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-21 22:11:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 22:11:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-21 22:11:01,784 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-21 22:11:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:01,784 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-21 22:11:01,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:11:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-21 22:11:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:11:01,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:01,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:01,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:11:01,786 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-21 22:11:01,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:01,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481298850] [2020-08-21 22:11:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 22:11:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:11:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 22:11:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481298850] [2020-08-21 22:11:01,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:01,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:11:01,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477141369] [2020-08-21 22:11:01,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:11:01,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:11:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:11:01,966 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-21 22:11:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:02,590 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-21 22:11:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:11:02,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-21 22:11:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:02,596 INFO L225 Difference]: With dead ends: 270 [2020-08-21 22:11:02,596 INFO L226 Difference]: Without dead ends: 240 [2020-08-21 22:11:02,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:11:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-21 22:11:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-21 22:11:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 22:11:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-21 22:11:02,616 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-21 22:11:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:02,617 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-21 22:11:02,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:11:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-21 22:11:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 22:11:02,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:02,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:02,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:11:02,619 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-21 22:11:02,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:02,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046640059] [2020-08-21 22:11:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:11:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:11:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:02,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046640059] [2020-08-21 22:11:02,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:02,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 22:11:02,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896042997] [2020-08-21 22:11:02,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:11:02,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:11:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:11:02,852 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-21 22:11:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:04,165 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-21 22:11:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:11:04,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-21 22:11:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:04,170 INFO L225 Difference]: With dead ends: 313 [2020-08-21 22:11:04,170 INFO L226 Difference]: Without dead ends: 307 [2020-08-21 22:11:04,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:11:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-21 22:11:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-21 22:11:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-21 22:11:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-21 22:11:04,197 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-21 22:11:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:04,198 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-21 22:11:04,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:11:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-21 22:11:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:11:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:04,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:04,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:11:04,203 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-21 22:11:04,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:04,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127658350] [2020-08-21 22:11:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:11:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:11:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:04,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127658350] [2020-08-21 22:11:04,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:04,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 22:11:04,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390771672] [2020-08-21 22:11:04,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:11:04,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:04,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:11:04,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:11:04,473 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-21 22:11:05,063 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-08-21 22:11:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:06,757 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-21 22:11:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:11:06,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-21 22:11:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:06,763 INFO L225 Difference]: With dead ends: 325 [2020-08-21 22:11:06,763 INFO L226 Difference]: Without dead ends: 284 [2020-08-21 22:11:06,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-21 22:11:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-21 22:11:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-21 22:11:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 22:11:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-21 22:11:06,803 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-21 22:11:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:06,803 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-21 22:11:06,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:11:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-21 22:11:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:11:06,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:06,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:06,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:11:06,806 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:06,807 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-21 22:11:06,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:06,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387012107] [2020-08-21 22:11:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:06,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:11:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:11:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387012107] [2020-08-21 22:11:07,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 22:11:07,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554249082] [2020-08-21 22:11:07,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:11:07,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:11:07,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:11:07,089 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-21 22:11:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,284 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-21 22:11:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:11:08,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-21 22:11:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,288 INFO L225 Difference]: With dead ends: 252 [2020-08-21 22:11:08,288 INFO L226 Difference]: Without dead ends: 211 [2020-08-21 22:11:08,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:11:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-21 22:11:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-21 22:11:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 22:11:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 22:11:08,310 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-21 22:11:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,310 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 22:11:08,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:11:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 22:11:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 22:11:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:11:08,312 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-21 22:11:08,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433844700] [2020-08-21 22:11:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 22:11:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433844700] [2020-08-21 22:11:08,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 22:11:08,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522283546] [2020-08-21 22:11:08,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:11:08,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:11:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:11:08,595 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-21 22:11:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,781 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-21 22:11:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:11:09,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-21 22:11:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,783 INFO L225 Difference]: With dead ends: 227 [2020-08-21 22:11:09,783 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 22:11:09,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:11:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 22:11:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 22:11:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 22:11:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-21 22:11:09,802 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-21 22:11:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,802 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-21 22:11:09,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:11:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-21 22:11:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 22:11:09,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:11:09,804 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-21 22:11:09,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366089702] [2020-08-21 22:11:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:11:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:11:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:11:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366089702] [2020-08-21 22:11:10,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 22:11:10,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291911174] [2020-08-21 22:11:10,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:11:10,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:11:10,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:11:10,026 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-21 22:11:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,839 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-21 22:11:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:11:10,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 22:11:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,842 INFO L225 Difference]: With dead ends: 296 [2020-08-21 22:11:10,842 INFO L226 Difference]: Without dead ends: 224 [2020-08-21 22:11:10,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:11:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-21 22:11:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-21 22:11:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 22:11:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-21 22:11:10,860 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-21 22:11:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:10,860 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-21 22:11:10,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:11:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-21 22:11:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 22:11:10,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:10,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:10,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:11:10,862 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-21 22:11:10,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:10,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476752432] [2020-08-21 22:11:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:11:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:11:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:11:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:11,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476752432] [2020-08-21 22:11:11,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:11,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 22:11:11,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783372846] [2020-08-21 22:11:11,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:11:11,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:11:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:11:11,087 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-21 22:11:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:12,007 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-21 22:11:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:11:12,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 22:11:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:12,009 INFO L225 Difference]: With dead ends: 232 [2020-08-21 22:11:12,009 INFO L226 Difference]: Without dead ends: 225 [2020-08-21 22:11:12,010 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 [2020-08-21 22:11:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-21 22:11:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-21 22:11:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 22:11:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-21 22:11:12,027 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-21 22:11:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:12,028 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-21 22:11:12,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:11:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-21 22:11:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 22:11:12,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:12,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:12,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:11:12,030 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-21 22:11:12,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:12,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225894152] [2020-08-21 22:11:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:11:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:11:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:11:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:12,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225894152] [2020-08-21 22:11:12,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:12,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:11:12,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967239339] [2020-08-21 22:11:12,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:11:12,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:12,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:11:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:11:12,306 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-21 22:11:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:12,941 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-21 22:11:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:11:12,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-21 22:11:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:12,943 INFO L225 Difference]: With dead ends: 258 [2020-08-21 22:11:12,943 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 22:11:12,944 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 [2020-08-21 22:11:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 22:11:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-21 22:11:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 22:11:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-21 22:11:12,966 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-21 22:11:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:12,967 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-21 22:11:12,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:11:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-21 22:11:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:11:12,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:12,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:12,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:11:12,968 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-21 22:11:12,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:12,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803252168] [2020-08-21 22:11:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:11:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:11:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:11:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:13,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803252168] [2020-08-21 22:11:13,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:13,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 22:11:13,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124848663] [2020-08-21 22:11:13,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:11:13,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:11:13,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:11:13,308 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-21 22:11:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:14,610 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-21 22:11:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:11:14,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-21 22:11:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:14,612 INFO L225 Difference]: With dead ends: 226 [2020-08-21 22:11:14,612 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 22:11:14,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:11:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 22:11:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-21 22:11:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 22:11:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-21 22:11:14,629 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-21 22:11:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:14,630 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-21 22:11:14,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:11:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-21 22:11:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 22:11:14,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:14,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:14,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:11:14,631 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-21 22:11:14,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:14,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845542503] [2020-08-21 22:11:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:11:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 22:11:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:11:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:14,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845542503] [2020-08-21 22:11:14,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:14,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 22:11:14,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39785739] [2020-08-21 22:11:14,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:11:14,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:11:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:11:14,896 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-21 22:11:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:15,691 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-21 22:11:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:11:15,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-21 22:11:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:15,693 INFO L225 Difference]: With dead ends: 200 [2020-08-21 22:11:15,693 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 22:11:15,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:11:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 22:11:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-21 22:11:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 22:11:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-21 22:11:15,714 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-21 22:11:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:15,714 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-21 22:11:15,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:11:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-21 22:11:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:11:15,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:15,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:15,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:11:15,716 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-21 22:11:15,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:15,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973930024] [2020-08-21 22:11:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:15,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:15,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:15,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 22:11:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:15,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:11:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:16,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973930024] [2020-08-21 22:11:16,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:16,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 22:11:16,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756058501] [2020-08-21 22:11:16,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:11:16,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:11:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:11:16,025 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-21 22:11:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:17,191 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-21 22:11:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:11:17,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 22:11:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:17,194 INFO L225 Difference]: With dead ends: 237 [2020-08-21 22:11:17,194 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 22:11:17,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:11:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 22:11:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-21 22:11:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-21 22:11:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-21 22:11:17,211 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-21 22:11:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:17,211 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-21 22:11:17,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:11:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-21 22:11:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:11:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:17,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:17,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:11:17,213 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:17,214 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-21 22:11:17,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:17,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266843875] [2020-08-21 22:11:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 22:11:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 22:11:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:17,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266843875] [2020-08-21 22:11:17,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:17,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 22:11:17,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884886957] [2020-08-21 22:11:17,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:11:17,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:11:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:11:17,484 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-21 22:11:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:18,452 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-21 22:11:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:11:18,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 22:11:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:18,454 INFO L225 Difference]: With dead ends: 206 [2020-08-21 22:11:18,454 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 22:11:18,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:11:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 22:11:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-21 22:11:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 22:11:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-21 22:11:18,473 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-21 22:11:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:18,473 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-21 22:11:18,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:11:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-21 22:11:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 22:11:18,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:18,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:18,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:11:18,476 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-21 22:11:18,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:18,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119304500] [2020-08-21 22:11:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:11:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:11:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:11:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:11:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:11:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:18,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119304500] [2020-08-21 22:11:18,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:18,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 22:11:18,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861177567] [2020-08-21 22:11:18,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:11:18,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:18,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:11:18,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:11:18,804 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-21 22:11:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:19,166 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-21 22:11:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:11:19,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-21 22:11:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:19,174 INFO L225 Difference]: With dead ends: 204 [2020-08-21 22:11:19,174 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 22:11:19,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:11:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 22:11:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-21 22:11:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 22:11:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-21 22:11:19,189 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-21 22:11:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:19,189 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-21 22:11:19,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:11:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-21 22:11:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 22:11:19,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:19,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:19,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:11:19,192 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-21 22:11:19,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:19,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246158958] [2020-08-21 22:11:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:11:19,232 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:11:19,232 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:11:19,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:11:19,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:11:19 BoogieIcfgContainer [2020-08-21 22:11:19,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:11:19,298 INFO L168 Benchmark]: Toolchain (without parser) took 27948.84 ms. Allocated memory was 140.0 MB in the beginning and 530.6 MB in the end (delta: 390.6 MB). Free memory was 102.2 MB in the beginning and 383.7 MB in the end (delta: -281.5 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:19,299 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:11:19,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.88 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 176.1 MB in the end (delta: -74.1 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:19,302 INFO L168 Benchmark]: Boogie Preprocessor took 70.65 ms. Allocated memory is still 203.4 MB. Free memory was 176.1 MB in the beginning and 172.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:19,306 INFO L168 Benchmark]: RCFGBuilder took 961.18 ms. Allocated memory is still 203.4 MB. Free memory was 172.7 MB in the beginning and 101.2 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:19,307 INFO L168 Benchmark]: TraceAbstraction took 26323.15 ms. Allocated memory was 203.4 MB in the beginning and 530.6 MB in the end (delta: 327.2 MB). Free memory was 101.2 MB in the beginning and 383.7 MB in the end (delta: -282.5 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:19,314 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 588.88 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 176.1 MB in the end (delta: -74.1 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.65 ms. Allocated memory is still 203.4 MB. Free memory was 176.1 MB in the beginning and 172.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 961.18 ms. Allocated memory is still 203.4 MB. Free memory was 172.7 MB in the beginning and 101.2 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26323.15 ms. Allocated memory was 203.4 MB in the beginning and 530.6 MB in the end (delta: 327.2 MB). Free memory was 101.2 MB in the beginning and 383.7 MB in the end (delta: -282.5 MB). Peak memory consumption was 44.6 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: 26.2s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 20.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4633 SDtfs, 6121 SDslu, 7830 SDs, 0 SdLazy, 16044 SolverSat, 1268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.3s 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...