/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 -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 0.1.25-5644d1e-m [2020-08-18 11:20:30,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:20:30,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:20:30,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:20:30,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:20:31,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:20:31,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:20:31,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:20:31,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:20:31,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:20:31,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:20:31,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:20:31,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:20:31,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:20:31,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:20:31,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:20:31,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:20:31,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:20:31,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:20:31,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:20:31,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:20:31,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:20:31,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:20:31,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:20:31,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:20:31,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:20:31,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:20:31,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:20:31,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:20:31,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:20:31,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:20:31,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:20:31,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:20:31,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:20:31,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:20:31,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:20:31,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:20:31,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:20:31,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:20:31,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:20:31,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:20:31,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:20:31,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:20:31,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:20:31,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:20:31,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:20:31,105 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:20:31,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:20:31,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:20:31,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:20:31,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:20:31,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:20:31,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:20:31,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:20:31,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:20:31,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:20:31,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:20:31,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:20:31,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:20:31,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:20:31,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:20:31,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:20:31,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:20:31,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:20:31,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:20:31,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:20:31,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:20:31,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:20:31,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:20:31,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:20:31,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:20:31,111 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 [2020-08-18 11:20:31,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:20:31,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:20:31,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:20:31,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:20:31,427 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:20:31,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-18 11:20:31,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c3809471/c5cde70b1cb24788b75ed83bda557753/FLAG151a415e3 [2020-08-18 11:20:32,044 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:20:32,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-18 11:20:32,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c3809471/c5cde70b1cb24788b75ed83bda557753/FLAG151a415e3 [2020-08-18 11:20:32,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c3809471/c5cde70b1cb24788b75ed83bda557753 [2020-08-18 11:20:32,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:20:32,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:20:32,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:20:32,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:20:32,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:20:32,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:20:32" (1/1) ... [2020-08-18 11:20:32,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82f562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:32, skipping insertion in model container [2020-08-18 11:20:32,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:20:32" (1/1) ... [2020-08-18 11:20:32,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:20:32,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:20:32,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:20:33,001 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:20:33,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:20:33,096 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:20:33,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33 WrapperNode [2020-08-18 11:20:33,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:20:33,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:20:33,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:20:33,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:20:33,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... [2020-08-18 11:20:33,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:20:33,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:20:33,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:20:33,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:20:33,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:20:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:20:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:20:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-18 11:20:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-18 11:20:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-18 11:20:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:20:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-18 11:20:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-18 11:20:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-18 11:20:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-18 11:20:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-18 11:20:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-18 11:20:33,250 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-18 11:20:33,250 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-18 11:20:33,250 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-18 11:20:33,250 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-18 11:20:33,250 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-18 11:20:33,251 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-18 11:20:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:20:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 11:20:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:20:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 11:20:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-18 11:20:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-18 11:20:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-18 11:20:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:20:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:20:33,514 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:33,592 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-18 11:20:33,592 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-18 11:20:33,622 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:33,863 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-18 11:20:33,864 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-18 11:20:33,867 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:33,906 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-18 11:20:33,906 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-18 11:20:33,913 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:33,956 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-18 11:20:33,957 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-18 11:20:34,044 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:34,061 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-18 11:20:34,061 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-18 11:20:34,082 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 11:20:34,168 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-18 11:20:34,169 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-18 11:20:34,186 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:20:34,187 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 11:20:34,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:20:34 BoogieIcfgContainer [2020-08-18 11:20:34,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:20:34,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:20:34,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:20:34,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:20:34,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:20:32" (1/3) ... [2020-08-18 11:20:34,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9657f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:20:34, skipping insertion in model container [2020-08-18 11:20:34,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:20:33" (2/3) ... [2020-08-18 11:20:34,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9657f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:20:34, skipping insertion in model container [2020-08-18 11:20:34,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:20:34" (3/3) ... [2020-08-18 11:20:34,201 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-18 11:20:34,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:20:34,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:20:34,234 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:20:34,262 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:20:34,262 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:20:34,263 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:20:34,263 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:20:34,263 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:20:34,263 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:20:34,264 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:20:34,264 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:20:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-18 11:20:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 11:20:34,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:34,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:20:34,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-18 11:20:34,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:34,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810686514] [2020-08-18 11:20:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:34,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:34,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:34,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810686514] [2020-08-18 11:20:34,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:34,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:20:34,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630608969] [2020-08-18 11:20:34,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:20:34,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:20:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:20:34,810 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-18 11:20:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:35,917 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-18 11:20:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:20:35,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 11:20:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:35,935 INFO L225 Difference]: With dead ends: 418 [2020-08-18 11:20:35,935 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 11:20:35,942 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 [2020-08-18 11:20:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 11:20:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-18 11:20:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-18 11:20:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-18 11:20:36,025 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-18 11:20:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:36,026 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-18 11:20:36,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:20:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-18 11:20:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 11:20:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:36,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:20:36,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:20:36,029 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-18 11:20:36,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:36,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738169629] [2020-08-18 11:20:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:36,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:36,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:36,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738169629] [2020-08-18 11:20:36,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:36,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:20:36,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028701168] [2020-08-18 11:20:36,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:20:36,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:20:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:20:36,304 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-18 11:20:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:37,576 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-18 11:20:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:20:37,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 11:20:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:37,581 INFO L225 Difference]: With dead ends: 410 [2020-08-18 11:20:37,582 INFO L226 Difference]: Without dead ends: 349 [2020-08-18 11:20:37,583 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 [2020-08-18 11:20:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-18 11:20:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-18 11:20:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-18 11:20:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-18 11:20:37,628 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-18 11:20:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:37,629 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-18 11:20:37,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:20:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-18 11:20:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 11:20:37,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:37,631 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] [2020-08-18 11:20:37,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:20:37,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-18 11:20:37,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:37,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138966432] [2020-08-18 11:20:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:37,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:37,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:37,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:37,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138966432] [2020-08-18 11:20:37,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:37,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:20:37,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419406753] [2020-08-18 11:20:37,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:20:37,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:20:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:20:37,801 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-18 11:20:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:38,601 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-18 11:20:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:20:38,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 11:20:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:38,608 INFO L225 Difference]: With dead ends: 487 [2020-08-18 11:20:38,608 INFO L226 Difference]: Without dead ends: 368 [2020-08-18 11:20:38,610 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 [2020-08-18 11:20:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-18 11:20:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-18 11:20:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-18 11:20:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-18 11:20:38,658 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-18 11:20:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:38,658 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-18 11:20:38,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:20:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-18 11:20:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 11:20:38,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:38,661 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] [2020-08-18 11:20:38,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:20:38,662 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-18 11:20:38,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:38,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882874151] [2020-08-18 11:20:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:38,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:38,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:38,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:38,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882874151] [2020-08-18 11:20:38,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:38,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:20:38,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376237637] [2020-08-18 11:20:38,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:20:38,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:20:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:20:38,817 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-18 11:20:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:39,647 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-18 11:20:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:20:39,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-18 11:20:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:39,652 INFO L225 Difference]: With dead ends: 347 [2020-08-18 11:20:39,652 INFO L226 Difference]: Without dead ends: 343 [2020-08-18 11:20:39,653 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 [2020-08-18 11:20:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-18 11:20:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-18 11:20:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-18 11:20:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-18 11:20:39,684 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-18 11:20:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:39,684 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-18 11:20:39,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:20:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-18 11:20:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:20:39,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:39,688 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] [2020-08-18 11:20:39,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:20:39,689 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-18 11:20:39,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:39,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584248816] [2020-08-18 11:20:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:39,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:39,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:39,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 11:20:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:39,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584248816] [2020-08-18 11:20:39,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:39,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:20:39,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911163515] [2020-08-18 11:20:39,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:20:39,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:20:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:20:39,876 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-18 11:20:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:41,024 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-18 11:20:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:20:41,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-18 11:20:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:41,030 INFO L225 Difference]: With dead ends: 394 [2020-08-18 11:20:41,030 INFO L226 Difference]: Without dead ends: 325 [2020-08-18 11:20:41,032 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 [2020-08-18 11:20:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-18 11:20:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-18 11:20:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-18 11:20:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-18 11:20:41,067 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-18 11:20:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:41,069 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-18 11:20:41,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:20:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-18 11:20:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:20:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:41,073 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] [2020-08-18 11:20:41,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:20:41,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-18 11:20:41,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:41,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322831717] [2020-08-18 11:20:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:20:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:20:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:41,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322831717] [2020-08-18 11:20:41,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:41,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:20:41,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038214331] [2020-08-18 11:20:41,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:20:41,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:20:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:20:41,269 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-18 11:20:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:41,777 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-18 11:20:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:20:41,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-18 11:20:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:41,780 INFO L225 Difference]: With dead ends: 316 [2020-08-18 11:20:41,780 INFO L226 Difference]: Without dead ends: 300 [2020-08-18 11:20:41,781 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 [2020-08-18 11:20:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-18 11:20:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-18 11:20:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-18 11:20:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-18 11:20:41,807 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-18 11:20:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:41,808 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-18 11:20:41,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:20:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-18 11:20:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:20:41,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:41,811 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] [2020-08-18 11:20:41,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:20:41,812 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-18 11:20:41,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:41,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959460708] [2020-08-18 11:20:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:41,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:42,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:20:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:20:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:42,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959460708] [2020-08-18 11:20:42,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:42,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:20:42,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980368851] [2020-08-18 11:20:42,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:20:42,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:42,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:20:42,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:20:42,049 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-18 11:20:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:42,979 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-18 11:20:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:20:43,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-18 11:20:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:43,017 INFO L225 Difference]: With dead ends: 290 [2020-08-18 11:20:43,017 INFO L226 Difference]: Without dead ends: 242 [2020-08-18 11:20:43,019 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 [2020-08-18 11:20:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-18 11:20:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-18 11:20:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-18 11:20:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-18 11:20:43,047 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-18 11:20:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:43,051 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-18 11:20:43,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:20:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-18 11:20:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 11:20:43,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:43,059 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] [2020-08-18 11:20:43,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:20:43,059 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-18 11:20:43,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:43,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532191942] [2020-08-18 11:20:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:20:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:20:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:20:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:43,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532191942] [2020-08-18 11:20:43,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:43,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:20:43,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207787778] [2020-08-18 11:20:43,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:20:43,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:20:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:20:43,234 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-18 11:20:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:43,818 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-18 11:20:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:20:43,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-18 11:20:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:43,821 INFO L225 Difference]: With dead ends: 270 [2020-08-18 11:20:43,821 INFO L226 Difference]: Without dead ends: 240 [2020-08-18 11:20:43,822 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 [2020-08-18 11:20:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-18 11:20:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-18 11:20:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-18 11:20:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-18 11:20:43,842 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-18 11:20:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:43,843 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-18 11:20:43,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:20:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-18 11:20:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 11:20:43,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:43,845 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] [2020-08-18 11:20:43,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:20:43,845 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-18 11:20:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:43,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648056860] [2020-08-18 11:20:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:43,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:44,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:20:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 11:20:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:44,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648056860] [2020-08-18 11:20:44,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:44,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:20:44,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816500371] [2020-08-18 11:20:44,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:20:44,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:20:44,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:20:44,091 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-18 11:20:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:45,636 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-18 11:20:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:20:45,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-18 11:20:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:45,641 INFO L225 Difference]: With dead ends: 313 [2020-08-18 11:20:45,642 INFO L226 Difference]: Without dead ends: 307 [2020-08-18 11:20:45,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:20:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-18 11:20:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-18 11:20:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-18 11:20:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-18 11:20:45,681 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-18 11:20:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:45,681 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-18 11:20:45,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:20:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-18 11:20:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 11:20:45,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:45,687 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] [2020-08-18 11:20:45,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:20:45,687 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-18 11:20:45,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:45,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292668914] [2020-08-18 11:20:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:20:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 11:20:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:45,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292668914] [2020-08-18 11:20:45,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:45,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:20:45,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551112465] [2020-08-18 11:20:45,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:20:45,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:20:45,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:20:45,997 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-18 11:20:46,268 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-08-18 11:20:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:48,073 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-18 11:20:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:20:48,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-18 11:20:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:48,080 INFO L225 Difference]: With dead ends: 325 [2020-08-18 11:20:48,081 INFO L226 Difference]: Without dead ends: 284 [2020-08-18 11:20:48,082 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 [2020-08-18 11:20:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-18 11:20:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-18 11:20:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-18 11:20:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-18 11:20:48,117 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-18 11:20:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:48,117 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-18 11:20:48,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:20:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-18 11:20:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 11:20:48,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:48,120 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] [2020-08-18 11:20:48,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:20:48,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-18 11:20:48,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:48,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396021868] [2020-08-18 11:20:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:20:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 11:20:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:48,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396021868] [2020-08-18 11:20:48,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:48,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:20:48,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812570481] [2020-08-18 11:20:48,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:20:48,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:20:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:20:48,421 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-18 11:20:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:49,527 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-18 11:20:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:20:49,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-18 11:20:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:49,530 INFO L225 Difference]: With dead ends: 252 [2020-08-18 11:20:49,531 INFO L226 Difference]: Without dead ends: 211 [2020-08-18 11:20:49,532 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 [2020-08-18 11:20:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-18 11:20:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-18 11:20:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 11:20:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 11:20:49,550 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-18 11:20:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:49,550 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 11:20:49,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:20:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 11:20:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 11:20:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:49,552 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] [2020-08-18 11:20:49,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:20:49,552 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-18 11:20:49,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:49,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015597705] [2020-08-18 11:20:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 11:20:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:49,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015597705] [2020-08-18 11:20:49,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:49,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 11:20:49,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715515290] [2020-08-18 11:20:49,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 11:20:49,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 11:20:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:20:49,876 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-18 11:20:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:51,179 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-18 11:20:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:20:51,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-18 11:20:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:51,183 INFO L225 Difference]: With dead ends: 227 [2020-08-18 11:20:51,183 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 11:20:51,184 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 [2020-08-18 11:20:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 11:20:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-18 11:20:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 11:20:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-18 11:20:51,213 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-18 11:20:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:51,214 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-18 11:20:51,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 11:20:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-18 11:20:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:20:51,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:51,215 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] [2020-08-18 11:20:51,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:20:51,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-18 11:20:51,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:51,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456542274] [2020-08-18 11:20:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 11:20:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:20:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:20:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456542274] [2020-08-18 11:20:51,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:51,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:20:51,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520304001] [2020-08-18 11:20:51,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:20:51,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:20:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:20:51,480 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-18 11:20:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:52,347 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-18 11:20:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 11:20:52,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-18 11:20:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:52,349 INFO L225 Difference]: With dead ends: 296 [2020-08-18 11:20:52,349 INFO L226 Difference]: Without dead ends: 224 [2020-08-18 11:20:52,350 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 [2020-08-18 11:20:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-18 11:20:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-18 11:20:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-18 11:20:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-18 11:20:52,374 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-18 11:20:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:52,377 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-18 11:20:52,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:20:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-18 11:20:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:20:52,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:52,378 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] [2020-08-18 11:20:52,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:20:52,379 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:52,379 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-18 11:20:52,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:52,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536715172] [2020-08-18 11:20:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 11:20:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:20:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:20:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:52,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536715172] [2020-08-18 11:20:52,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:52,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:20:52,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597607570] [2020-08-18 11:20:52,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:20:52,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:20:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:20:52,615 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-18 11:20:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:53,517 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-18 11:20:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:20:53,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-18 11:20:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:53,520 INFO L225 Difference]: With dead ends: 232 [2020-08-18 11:20:53,520 INFO L226 Difference]: Without dead ends: 225 [2020-08-18 11:20:53,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:20:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-18 11:20:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-18 11:20:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 11:20:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-18 11:20:53,545 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-18 11:20:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:53,546 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-18 11:20:53,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:20:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-18 11:20:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 11:20:53,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:53,548 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] [2020-08-18 11:20:53,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 11:20:53,549 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-18 11:20:53,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:53,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695362779] [2020-08-18 11:20:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:20:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:20:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 11:20:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:53,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695362779] [2020-08-18 11:20:53,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:53,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:20:53,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865913674] [2020-08-18 11:20:53,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:20:53,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:53,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:20:53,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:20:53,734 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-18 11:20:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:54,386 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-18 11:20:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:20:54,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-18 11:20:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:54,389 INFO L225 Difference]: With dead ends: 258 [2020-08-18 11:20:54,389 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 11:20:54,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:20:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 11:20:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-18 11:20:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-18 11:20:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-18 11:20:54,433 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-18 11:20:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:54,434 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-18 11:20:54,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:20:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-18 11:20:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 11:20:54,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:54,439 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] [2020-08-18 11:20:54,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 11:20:54,439 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:54,440 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-18 11:20:54,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:54,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669610034] [2020-08-18 11:20:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:20:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 11:20:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 11:20:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:54,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669610034] [2020-08-18 11:20:54,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:54,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-18 11:20:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829798374] [2020-08-18 11:20:54,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 11:20:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 11:20:54,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:20:54,710 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-18 11:20:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:56,024 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-18 11:20:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 11:20:56,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-18 11:20:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:56,027 INFO L225 Difference]: With dead ends: 226 [2020-08-18 11:20:56,027 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 11:20:56,028 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 [2020-08-18 11:20:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 11:20:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-18 11:20:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 11:20:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-18 11:20:56,043 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-18 11:20:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:56,044 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-18 11:20:56,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 11:20:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-18 11:20:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 11:20:56,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:56,045 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] [2020-08-18 11:20:56,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 11:20:56,045 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-18 11:20:56,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:56,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720870398] [2020-08-18 11:20:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:20:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:20:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 11:20:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:56,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720870398] [2020-08-18 11:20:56,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:56,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-18 11:20:56,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743027547] [2020-08-18 11:20:56,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 11:20:56,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:56,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 11:20:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:20:56,315 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-18 11:20:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:57,314 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-18 11:20:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 11:20:57,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-18 11:20:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:57,317 INFO L225 Difference]: With dead ends: 200 [2020-08-18 11:20:57,317 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 11:20:57,317 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 [2020-08-18 11:20:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 11:20:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-18 11:20:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 11:20:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-18 11:20:57,335 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-18 11:20:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:57,336 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-18 11:20:57,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 11:20:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-18 11:20:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 11:20:57,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:57,337 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] [2020-08-18 11:20:57,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 11:20:57,337 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-18 11:20:57,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:57,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35881142] [2020-08-18 11:20:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 11:20:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 11:20:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:57,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35881142] [2020-08-18 11:20:57,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:57,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 11:20:57,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135715881] [2020-08-18 11:20:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:20:57,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:20:57,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:20:57,643 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-18 11:20:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:20:59,079 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-18 11:20:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:20:59,080 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-18 11:20:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:20:59,082 INFO L225 Difference]: With dead ends: 237 [2020-08-18 11:20:59,082 INFO L226 Difference]: Without dead ends: 220 [2020-08-18 11:20:59,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-18 11:20:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-18 11:20:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-18 11:20:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-18 11:20:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-18 11:20:59,112 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-18 11:20:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:20:59,113 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-18 11:20:59,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:20:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-18 11:20:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 11:20:59,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:20:59,115 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] [2020-08-18 11:20:59,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 11:20:59,115 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:20:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:20:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-18 11:20:59,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:20:59,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129171758] [2020-08-18 11:20:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:20:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:20:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:20:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:20:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 11:20:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 11:20:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:20:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:20:59,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129171758] [2020-08-18 11:20:59,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:20:59,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 11:20:59,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385051966] [2020-08-18 11:20:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 11:20:59,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:20:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 11:20:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:20:59,432 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-18 11:21:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:00,336 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-18 11:21:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:21:00,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-18 11:21:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:00,338 INFO L225 Difference]: With dead ends: 206 [2020-08-18 11:21:00,338 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 11:21:00,339 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 [2020-08-18 11:21:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 11:21:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-18 11:21:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 11:21:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-18 11:21:00,356 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-18 11:21:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:00,356 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-18 11:21:00,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 11:21:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-18 11:21:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 11:21:00,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:00,358 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] [2020-08-18 11:21:00,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 11:21:00,358 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-18 11:21:00,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:00,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652733137] [2020-08-18 11:21:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:21:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 11:21:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:21:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:00,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652733137] [2020-08-18 11:21:00,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:00,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 11:21:00,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657423868] [2020-08-18 11:21:00,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:21:00,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:00,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:21:00,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:21:00,561 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-18 11:21:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:00,875 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-18 11:21:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:21:00,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-18 11:21:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:00,878 INFO L225 Difference]: With dead ends: 204 [2020-08-18 11:21:00,878 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 11:21:00,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:21:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 11:21:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-18 11:21:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 11:21:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-18 11:21:00,899 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-18 11:21:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:00,900 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-18 11:21:00,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:21:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-18 11:21:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 11:21:00,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:00,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:00,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 11:21:00,903 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-18 11:21:00,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:00,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201819709] [2020-08-18 11:21:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:21:00,957 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:21:00,957 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:21:00,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 11:21:01,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:21:01 BoogieIcfgContainer [2020-08-18 11:21:01,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:21:01,025 INFO L168 Benchmark]: Toolchain (without parser) took 28567.96 ms. Allocated memory was 141.0 MB in the beginning and 565.7 MB in the end (delta: 424.7 MB). Free memory was 103.2 MB in the beginning and 296.2 MB in the end (delta: -193.0 MB). Peak memory consumption was 231.7 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,028 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.37 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.0 MB in the beginning and 174.5 MB in the end (delta: -71.5 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,032 INFO L168 Benchmark]: Boogie Preprocessor took 72.03 ms. Allocated memory is still 203.4 MB. Free memory was 174.5 MB in the beginning and 171.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,033 INFO L168 Benchmark]: RCFGBuilder took 1022.83 ms. Allocated memory is still 203.4 MB. Free memory was 171.2 MB in the beginning and 99.8 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,034 INFO L168 Benchmark]: TraceAbstraction took 26821.63 ms. Allocated memory was 203.4 MB in the beginning and 565.7 MB in the end (delta: 362.3 MB). Free memory was 99.1 MB in the beginning and 296.2 MB in the end (delta: -197.0 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:01,039 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.37 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.0 MB in the beginning and 174.5 MB in the end (delta: -71.5 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.03 ms. Allocated memory is still 203.4 MB. Free memory was 174.5 MB in the beginning and 171.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1022.83 ms. Allocated memory is still 203.4 MB. Free memory was 171.2 MB in the beginning and 99.8 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26821.63 ms. Allocated memory was 203.4 MB in the beginning and 565.7 MB in the end (delta: 362.3 MB). Free memory was 99.1 MB in the beginning and 296.2 MB in the end (delta: -197.0 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1011]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int KernelMode ; [L22] int Executive ; [L23] int DevicePowerState ; [L24] int s ; [L25] int UNLOADED ; [L26] int NP ; [L27] int DC ; [L28] int SKIP1 ; [L29] int SKIP2 ; [L30] int MPR1 ; [L31] int MPR3 ; [L32] int IPC ; [L33] int pended ; [L34] int compFptr ; [L35] int compRegistered ; [L36] int lowerDriverReturn ; [L37] int setEventCalled ; [L38] int customIrp ; [L39] int myStatus ; [L292] int status ; [L293] int irp = __VERIFIER_nondet_int() ; [L294] int pirp ; [L295] int pirp__IoStatus__Status ; [L296] int irp_choice = __VERIFIER_nondet_int() ; [L297] int devobj = __VERIFIER_nondet_int() ; [L298] int __cil_tmp8 ; [L300] KernelMode = 0 [L301] Executive = 0 [L302] DevicePowerState = 1 [L303] s = 0 [L304] UNLOADED = 0 [L305] NP = 0 [L306] DC = 0 [L307] SKIP1 = 0 [L308] SKIP2 = 0 [L309] MPR1 = 0 [L310] MPR3 = 0 [L311] IPC = 0 [L312] pended = 0 [L313] compFptr = 0 [L314] compRegistered = 0 [L315] lowerDriverReturn = 0 [L316] setEventCalled = 0 [L317] customIrp = 0 [L318] myStatus = 0 [L322] status = 0 [L323] pirp = irp [L324] CALL _BLAST_init() [L59] UNLOADED = 0 [L60] NP = 1 [L61] DC = 2 [L62] SKIP1 = 3 [L63] SKIP2 = 4 [L64] MPR1 = 5 [L65] MPR3 = 6 [L66] IPC = 7 [L67] s = UNLOADED [L68] pended = 0 [L69] compFptr = 0 [L70] compRegistered = 0 [L71] lowerDriverReturn = 0 [L72] setEventCalled = 0 [L73] customIrp = 0 [L324] RET _BLAST_init() [L326] COND TRUE status >= 0 [L327] s = NP [L328] customIrp = 0 [L329] setEventCalled = customIrp [L330] lowerDriverReturn = setEventCalled [L331] compRegistered = lowerDriverReturn [L332] pended = compRegistered [L333] pirp__IoStatus__Status = 0 [L334] myStatus = 0 [L335] COND FALSE !(irp_choice == 0) [L340] CALL stub_driver_init() [L45] s = NP [L46] pended = 0 [L47] compFptr = 0 [L48] compRegistered = 0 [L49] lowerDriverReturn = 0 [L50] setEventCalled = 0 [L51] customIrp = 0 [L340] RET stub_driver_init() [L343] COND FALSE !(status < 0) [L347] int tmp_ndt_1; [L348] tmp_ndt_1 = __VERIFIER_nondet_int() [L349] COND FALSE !(tmp_ndt_1 == 0) [L352] int tmp_ndt_2; [L353] tmp_ndt_2 = __VERIFIER_nondet_int() [L354] COND FALSE !(tmp_ndt_2 == 1) [L357] int tmp_ndt_3; [L358] tmp_ndt_3 = __VERIFIER_nondet_int() [L359] COND TRUE tmp_ndt_3 == 3 [L386] CALL, EXPR KbFilter_PnP(devobj, pirp) [L78] int devExt ; [L79] int irpStack ; [L80] int status ; [L81] int event = __VERIFIER_nondet_int() ; [L82] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L83] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L84] int irpStack__MinorFunction = __VERIFIER_nondet_int() ; [L85] int devExt__TopOfStack = __VERIFIER_nondet_int() ; [L86] int devExt__Started ; [L87] int devExt__Removed ; [L88] int devExt__SurpriseRemoved ; [L89] int Irp__IoStatus__Status ; [L90] int Irp__IoStatus__Information ; [L91] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L92] int irpSp ; [L93] int nextIrpSp ; [L94] int nextIrpSp__Control ; [L95] int irpSp___0 ; [L96] int irpSp__Context ; [L97] int irpSp__Control ; [L98] long __cil_tmp23 ; [L101] status = 0 [L102] devExt = DeviceObject__DeviceExtension [L103] irpStack = Irp__Tail__Overlay__CurrentStackLocation [L104] COND FALSE !(irpStack__MinorFunction == 0) [L107] COND FALSE !(irpStack__MinorFunction == 23) [L110] COND TRUE irpStack__MinorFunction == 2 [L234] devExt__Removed = 1 [L235] COND TRUE s == NP [L236] s = SKIP1 [L243] Irp__CurrentLocation ++ [L244] Irp__Tail__Overlay__CurrentStackLocation ++ [L245] CALL IofCallDriver(devExt__TopOfStack, Irp) [L481] int returnVal2 ; [L482] int compRetStatus ; [L483] int lcontext = __VERIFIER_nondet_int() ; [L484] long long __cil_tmp7 ; [L487] COND FALSE !(\read(compRegistered)) [L500] int tmp_ndt_6; [L501] tmp_ndt_6 = __VERIFIER_nondet_int() [L502] COND FALSE !(tmp_ndt_6 == 0) [L505] int tmp_ndt_7; [L506] tmp_ndt_7 = __VERIFIER_nondet_int() [L507] COND TRUE tmp_ndt_7 == 1 [L516] returnVal2 = -1073741823 [L526] COND FALSE !(s == NP) [L530] COND FALSE !(s == MPR1) [L539] COND TRUE s == SKIP1 [L540] s = SKIP2 [L541] lowerDriverReturn = returnVal2 [L549] return (returnVal2); [L245] RET IofCallDriver(devExt__TopOfStack, Irp) [L246] status = 0 [L288] return (status); [L386] RET, EXPR KbFilter_PnP(devobj, pirp) [L386] status = KbFilter_PnP(devobj, pirp) [L410] COND FALSE !(pended == 1) [L418] COND FALSE !(pended == 1) [L426] COND TRUE s != UNLOADED [L427] COND TRUE status != -1 [L428] COND FALSE !(s != SKIP2) [L438] COND FALSE !(pended == 1) [L445] COND FALSE !(s == DC) [L450] COND TRUE status != lowerDriverReturn [L451] CALL errorFn() [L1011] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 18 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.7s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4630 SDtfs, 6123 SDslu, 7819 SDs, 0 SdLazy, 16027 SolverSat, 1270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.0s 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, 0.5s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1029 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 212124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...