/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:00:24,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:00:24,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:00:25,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:00:25,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:00:25,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:00:25,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:00:25,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:00:25,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:00:25,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:00:25,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:00:25,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:00:25,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:00:25,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:00:25,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:00:25,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:00:25,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:00:25,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:00:25,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:00:25,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:00:25,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:00:25,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:00:25,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:00:25,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:00:25,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:00:25,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:00:25,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:00:25,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:00:25,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:00:25,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:00:25,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:00:25,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:00:25,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:00:25,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:00:25,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:00:25,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:00:25,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:00:25,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:00:25,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:00:25,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:00:25,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:00:25,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:00:25,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:00:25,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:00:25,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:00:25,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:00:25,062 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:00:25,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:00:25,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:00:25,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:00:25,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:00:25,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:00:25,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:00:25,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:00:25,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:00:25,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:00:25,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:00:25,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:00:25,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:00:25,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:00:25,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:00:25,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:00:25,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:00:25,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:00:25,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:00:25,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:00:25,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:00:25,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:00:25,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:00:25,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:00:25,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:00:25,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:00:25,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:00:25,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:00:25,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:00:25,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:00:25,427 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:00:25,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product20.cil.c [2020-08-21 22:00:25,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25b68db9/5c71ce9423674cb1b3e66a2d3675460e/FLAG185018899 [2020-08-21 22:00:26,041 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:00:26,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product20.cil.c [2020-08-21 22:00:26,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25b68db9/5c71ce9423674cb1b3e66a2d3675460e/FLAG185018899 [2020-08-21 22:00:26,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25b68db9/5c71ce9423674cb1b3e66a2d3675460e [2020-08-21 22:00:26,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:00:26,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:00:26,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:00:26,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:00:26,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:00:26,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:00:26" (1/1) ... [2020-08-21 22:00:26,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddad570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:26, skipping insertion in model container [2020-08-21 22:00:26,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:00:26" (1/1) ... [2020-08-21 22:00:26,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:00:26,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:00:26,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:00:26,886 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:00:26,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:00:27,027 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:00:27,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27 WrapperNode [2020-08-21 22:00:27,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:00:27,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:00:27,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:00:27,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:00:27,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... [2020-08-21 22:00:27,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:00:27,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:00:27,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:00:27,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:00:27,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:00:27,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:00:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:00:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 22:00:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 22:00:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 22:00:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 22:00:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 22:00:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 22:00:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 22:00:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 22:00:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 22:00:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 22:00:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 22:00:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 22:00:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 22:00:27,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 22:00:27,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 22:00:27,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 22:00:27,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:00:27,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:00:27,202 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:00:27,203 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:00:27,204 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 22:00:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:00:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 22:00:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 22:00:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:00:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 22:00:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 22:00:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 22:00:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 22:00:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 22:00:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 22:00:27,208 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 22:00:27,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:00:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 22:00:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 22:00:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 22:00:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 22:00:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:00:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 22:00:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 22:00:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 22:00:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 22:00:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 22:00:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:00:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 22:00:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:00:28,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:00:28,238 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 22:00:28,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:00:28 BoogieIcfgContainer [2020-08-21 22:00:28,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:00:28,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:00:28,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:00:28,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:00:28,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:00:26" (1/3) ... [2020-08-21 22:00:28,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52647cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:00:28, skipping insertion in model container [2020-08-21 22:00:28,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:00:27" (2/3) ... [2020-08-21 22:00:28,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52647cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:00:28, skipping insertion in model container [2020-08-21 22:00:28,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:00:28" (3/3) ... [2020-08-21 22:00:28,252 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product20.cil.c [2020-08-21 22:00:28,263 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:00:28,271 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:00:28,286 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:00:28,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:00:28,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:00:28,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:00:28,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:00:28,311 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:00:28,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:00:28,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:00:28,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:00:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-08-21 22:00:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:00:28,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:28,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:28,347 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1020125937, now seen corresponding path program 1 times [2020-08-21 22:00:28,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:28,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695063368] [2020-08-21 22:00:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,012 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:29,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 22:00:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:00:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:00:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:00:29,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695063368] [2020-08-21 22:00:29,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:29,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:00:29,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583276357] [2020-08-21 22:00:29,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:00:29,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:00:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:00:29,172 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 3 states. [2020-08-21 22:00:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:30,220 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2020-08-21 22:00:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:00:30,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 22:00:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:30,235 INFO L225 Difference]: With dead ends: 282 [2020-08-21 22:00:30,236 INFO L226 Difference]: Without dead ends: 153 [2020-08-21 22:00:30,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:00:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-21 22:00:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-21 22:00:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 22:00:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-21 22:00:30,319 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 52 [2020-08-21 22:00:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:30,319 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-21 22:00:30,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:00:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-21 22:00:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:00:30,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:30,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:30,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:00:30,324 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1976002315, now seen corresponding path program 1 times [2020-08-21 22:00:30,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:30,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449650834] [2020-08-21 22:00:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,715 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:30,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:00:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:00:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 22:00:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:00:30,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449650834] [2020-08-21 22:00:30,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:30,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:00:30,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724910252] [2020-08-21 22:00:30,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:00:30,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:00:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:00:30,761 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 4 states. [2020-08-21 22:00:31,163 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:00:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:31,930 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2020-08-21 22:00:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:00:31,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 22:00:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:31,935 INFO L225 Difference]: With dead ends: 205 [2020-08-21 22:00:31,935 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 22:00:31,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:00:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 22:00:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-08-21 22:00:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 22:00:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-08-21 22:00:31,974 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 53 [2020-08-21 22:00:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:31,974 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-08-21 22:00:31,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:00:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-08-21 22:00:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 22:00:31,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:31,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:31,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:00:31,978 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash -979616740, now seen corresponding path program 1 times [2020-08-21 22:00:31,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:31,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92376425] [2020-08-21 22:00:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,303 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:32,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:00:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:00:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 22:00:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:00:32,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92376425] [2020-08-21 22:00:32,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:32,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:00:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101961283] [2020-08-21 22:00:32,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:00:32,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:00:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:00:32,438 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 8 states. [2020-08-21 22:00:32,767 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:33,071 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:33,300 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:33,572 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:34,319 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:00:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:35,920 INFO L93 Difference]: Finished difference Result 390 states and 482 transitions. [2020-08-21 22:00:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:00:35,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-21 22:00:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:35,929 INFO L225 Difference]: With dead ends: 390 [2020-08-21 22:00:35,929 INFO L226 Difference]: Without dead ends: 303 [2020-08-21 22:00:35,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:00:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-08-21 22:00:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2020-08-21 22:00:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 22:00:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2020-08-21 22:00:36,021 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 58 [2020-08-21 22:00:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:36,022 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2020-08-21 22:00:36,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:00:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2020-08-21 22:00:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 22:00:36,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:36,025 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, 1, 1] [2020-08-21 22:00:36,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:00:36,026 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1983050375, now seen corresponding path program 1 times [2020-08-21 22:00:36,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:36,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236411363] [2020-08-21 22:00:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,293 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:00:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:00:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:00:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 22:00:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:00:36,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236411363] [2020-08-21 22:00:36,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:36,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:00:36,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274207479] [2020-08-21 22:00:36,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:00:36,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:00:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:00:36,406 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand 8 states. [2020-08-21 22:00:36,817 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:38,114 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:38,415 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:38,692 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:00:38,965 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:39,601 INFO L93 Difference]: Finished difference Result 741 states and 971 transitions. [2020-08-21 22:00:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:00:39,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 22:00:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:39,608 INFO L225 Difference]: With dead ends: 741 [2020-08-21 22:00:39,608 INFO L226 Difference]: Without dead ends: 523 [2020-08-21 22:00:39,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:00:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-08-21 22:00:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2020-08-21 22:00:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-21 22:00:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 563 transitions. [2020-08-21 22:00:39,716 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 563 transitions. Word has length 63 [2020-08-21 22:00:39,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:39,717 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 563 transitions. [2020-08-21 22:00:39,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:00:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 563 transitions. [2020-08-21 22:00:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:00:39,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:39,722 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, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:39,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:00:39,722 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -572770771, now seen corresponding path program 1 times [2020-08-21 22:00:39,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:39,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111640016] [2020-08-21 22:00:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,038 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:00:40,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:00:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:00:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:00:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:00:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:00:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:00:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:00:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 22:00:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 22:00:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 22:00:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:00:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:00:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111640016] [2020-08-21 22:00:40,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:00:40,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:00:40,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881097618] [2020-08-21 22:00:40,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:00:40,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:00:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:00:40,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:00:40,112 INFO L87 Difference]: Start difference. First operand 457 states and 563 transitions. Second operand 6 states. [2020-08-21 22:00:40,417 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:00:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:00:41,255 INFO L93 Difference]: Finished difference Result 806 states and 1047 transitions. [2020-08-21 22:00:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:00:41,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-21 22:00:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:00:41,259 INFO L225 Difference]: With dead ends: 806 [2020-08-21 22:00:41,259 INFO L226 Difference]: Without dead ends: 373 [2020-08-21 22:00:41,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:00:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-21 22:00:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 323. [2020-08-21 22:00:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 22:00:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 374 transitions. [2020-08-21 22:00:41,332 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 374 transitions. Word has length 67 [2020-08-21 22:00:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:00:41,333 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 374 transitions. [2020-08-21 22:00:41,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:00:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 374 transitions. [2020-08-21 22:00:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:00:41,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:00:41,335 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, 1, 1, 1, 1, 1, 1] [2020-08-21 22:00:41,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:00:41,336 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:00:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:00:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 935934029, now seen corresponding path program 1 times [2020-08-21 22:00:41,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:00:41,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775074638] [2020-08-21 22:00:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:00:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:00:41,396 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:00:41,396 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:00:41,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:00:41,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:00:41 BoogieIcfgContainer [2020-08-21 22:00:41,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:00:41,444 INFO L168 Benchmark]: Toolchain (without parser) took 15073.79 ms. Allocated memory was 139.5 MB in the beginning and 500.2 MB in the end (delta: 360.7 MB). Free memory was 101.6 MB in the beginning and 110.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 351.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,445 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.10 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 169.4 MB in the end (delta: -68.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,450 INFO L168 Benchmark]: Boogie Preprocessor took 91.65 ms. Allocated memory is still 202.4 MB. Free memory was 169.4 MB in the beginning and 164.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,451 INFO L168 Benchmark]: RCFGBuilder took 1122.50 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 164.7 MB in the beginning and 193.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,453 INFO L168 Benchmark]: TraceAbstraction took 13196.74 ms. Allocated memory was 235.4 MB in the beginning and 500.2 MB in the end (delta: 264.8 MB). Free memory was 192.0 MB in the beginning and 110.8 MB in the end (delta: 81.1 MB). Peak memory consumption was 345.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:00:41,457 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.10 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 169.4 MB in the end (delta: -68.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.65 ms. Allocated memory is still 202.4 MB. Free memory was 169.4 MB in the beginning and 164.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1122.50 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 164.7 MB in the beginning and 193.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13196.74 ms. Allocated memory was 235.4 MB in the beginning and 500.2 MB in the end (delta: 264.8 MB). Free memory was 192.0 MB in the beginning and 110.8 MB in the end (delta: 81.1 MB). Peak memory consumption was 345.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 927]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L247] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L444] int cleanupTimeShifts = 4; [L590] int pumpRunning = 0; [L591] int systemActive = 1; [L834] int waterLevel = 1; [L835] int methaneLevelCritical = 0; [L522] int retValue_acc ; [L523] int tmp ; [L527] FCALL select_helpers() [L528] FCALL select_features() [L529] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L529] RET, EXPR valid_product() [L529] tmp = valid_product() [L531] COND TRUE \read(tmp) [L533] FCALL setup() [L534] CALL runTest() [L516] CALL test() [L766] int splverifierCounter ; [L767] int tmp ; [L768] int tmp___0 ; [L769] int tmp___1 ; [L770] int tmp___2 ; [L773] splverifierCounter = 0 [L775] COND TRUE 1 [L777] COND TRUE splverifierCounter < 4 [L783] tmp = __VERIFIER_nondet_int() [L785] COND TRUE \read(tmp) [L787] CALL waterRise() [L852] COND TRUE waterLevel < 2 [L853] waterLevel = waterLevel + 1 [L787] RET waterRise() [L793] tmp___0 = __VERIFIER_nondet_int() [L795] COND FALSE !(\read(tmp___0)) [L803] tmp___2 = __VERIFIER_nondet_int() [L805] COND FALSE !(\read(tmp___2)) [L811] tmp___1 = __VERIFIER_nondet_int() [L813] COND TRUE \read(tmp___1) [L815] CALL stopSystem() [L745] COND FALSE !(\read(pumpRunning)) [L752] systemActive = 0 [L815] RET stopSystem() [L822] CALL timeShift() [L597] COND FALSE !(\read(pumpRunning)) [L604] COND FALSE !(\read(systemActive)) [L612] CALL __utac_acc__Specification3_spec__1() [L550] int tmp ; [L551] int tmp___0 ; [L552] int tmp___1 ; [L556] CALL, EXPR isMethaneLevelCritical() [L873] int retValue_acc ; [L876] retValue_acc = methaneLevelCritical [L877] return (retValue_acc); [L556] RET, EXPR isMethaneLevelCritical() [L556] tmp = isMethaneLevelCritical() [L558] COND FALSE !(\read(tmp)) [L562] CALL, EXPR getWaterLevel() [L905] int retValue_acc ; [L908] retValue_acc = waterLevel [L909] return (retValue_acc); [L562] RET, EXPR getWaterLevel() [L562] tmp___0 = getWaterLevel() [L564] COND TRUE tmp___0 == 2 [L566] CALL, EXPR isPumpRunning() [L678] int retValue_acc ; [L681] retValue_acc = pumpRunning [L682] return (retValue_acc); [L566] RET, EXPR isPumpRunning() [L566] tmp___1 = isPumpRunning() [L568] COND FALSE !(\read(tmp___1)) [L572] CALL __automaton_fail() [L927] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 227 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 533 SDtfs, 843 SDslu, 385 SDs, 0 SdLazy, 1890 SolverSat, 558 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=457occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 236 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 82716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...