/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:49:08,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:49:08,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:49:08,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:49:08,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:49:08,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:49:08,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:49:08,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:49:08,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:49:08,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:49:08,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:49:08,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:49:08,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:49:08,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:49:08,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:49:08,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:49:08,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:49:08,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:49:08,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:49:08,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:49:08,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:49:08,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:49:08,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:49:08,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:49:08,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:49:08,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:49:08,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:49:08,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:49:08,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:49:08,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:49:08,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:49:08,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:49:08,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:49:08,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:49:08,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:49:08,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:49:08,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:49:08,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:49:08,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:49:08,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:49:08,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:49:08,701 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 22:49:08,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:49:08,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:49:08,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:49:08,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:49:08,746 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:49:08,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:49:08,747 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:49:08,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:49:08,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:49:08,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:49:08,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:49:08,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:49:08,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:49:08,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:49:08,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:49:08,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:49:08,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:49:08,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:49:08,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:49:08,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:49:08,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:49:08,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:49:08,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:49:08,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:49:08,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:49:08,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:49:08,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:49:08,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:49:08,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:49:08,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:49:09,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:49:09,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:49:09,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:49:09,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:49:09,100 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:49:09,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-21 22:49:09,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a714bf9/222e2f78903047518b6252947330dcae/FLAGdc89cd604 [2020-08-21 22:49:09,675 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:49:09,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-21 22:49:09,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a714bf9/222e2f78903047518b6252947330dcae/FLAGdc89cd604 [2020-08-21 22:49:09,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a714bf9/222e2f78903047518b6252947330dcae [2020-08-21 22:49:09,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:49:09,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:49:09,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:49:09,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:49:09,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:49:09,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:49:09" (1/1) ... [2020-08-21 22:49:09,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7503bbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:09, skipping insertion in model container [2020-08-21 22:49:09,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:49:09" (1/1) ... [2020-08-21 22:49:10,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:49:10,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:49:10,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:49:10,721 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:49:10,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:49:10,856 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:49:10,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10 WrapperNode [2020-08-21 22:49:10,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:49:10,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:49:10,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:49:10,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:49:10,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (1/1) ... [2020-08-21 22:49:10,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:49:10,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:49:10,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:49:10,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:49:10,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (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 22:49:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:49:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 22:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 22:49:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 22:49:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 22:49:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 22:49:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 22:49:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 22:49:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 22:49:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 22:49:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 22:49:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 22:49:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 22:49:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 22:49:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 22:49:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 22:49:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 22:49:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 22:49:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:49:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 22:49:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 22:49:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 22:49:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 22:49:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 22:49:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 22:49:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:49:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 22:49:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 22:49:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 22:49:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 22:49:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:49:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 22:49:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 22:49:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:49:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:49:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 22:49:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:49:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:49:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 22:49:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 22:49:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:49:12,094 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:49:12,095 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 22:49:12,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:49:12 BoogieIcfgContainer [2020-08-21 22:49:12,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:49:12,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:49:12,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:49:12,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:49:12,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:49:09" (1/3) ... [2020-08-21 22:49:12,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413b311b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:49:12, skipping insertion in model container [2020-08-21 22:49:12,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:49:10" (2/3) ... [2020-08-21 22:49:12,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413b311b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:49:12, skipping insertion in model container [2020-08-21 22:49:12,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:49:12" (3/3) ... [2020-08-21 22:49:12,116 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product28.cil.c [2020-08-21 22:49:12,126 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:49:12,135 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:49:12,146 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:49:12,169 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:49:12,170 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:49:12,170 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:49:12,170 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:49:12,170 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:49:12,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:49:12,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:49:12,170 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:49:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-08-21 22:49:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:49:12,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:12,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:49:12,204 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:12,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1443511359, now seen corresponding path program 1 times [2020-08-21 22:49:12,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:12,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077619563] [2020-08-21 22:49:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:12,927 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:49:12,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:49:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:49:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:49:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:49:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:49:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 22:49:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:49:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:49:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:13,068 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 22:49:13,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077619563] [2020-08-21 22:49:13,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:49:13,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:49:13,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148628952] [2020-08-21 22:49:13,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:49:13,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:49:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:49:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:49:13,097 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 3 states. [2020-08-21 22:49:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:49:14,282 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2020-08-21 22:49:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:49:14,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 22:49:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:49:14,302 INFO L225 Difference]: With dead ends: 282 [2020-08-21 22:49:14,302 INFO L226 Difference]: Without dead ends: 153 [2020-08-21 22:49:14,308 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 22:49:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-21 22:49:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-21 22:49:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 22:49:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-21 22:49:14,416 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 52 [2020-08-21 22:49:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:49:14,417 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-21 22:49:14,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:49:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-21 22:49:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:49:14,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:14,422 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 22:49:14,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:49:14,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 880615085, now seen corresponding path program 1 times [2020-08-21 22:49:14,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:14,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099382617] [2020-08-21 22:49:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,816 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:49:14,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:49:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:49:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:49:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:49:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:49:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:49:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:49:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 22:49:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:14,864 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 22:49:14,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099382617] [2020-08-21 22:49:14,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:49:14,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:49:14,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071564045] [2020-08-21 22:49:14,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:49:14,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:49:14,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:49:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:49:14,868 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 4 states. [2020-08-21 22:49:15,267 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:49:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:49:15,966 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2020-08-21 22:49:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:49:15,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 22:49:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:49:15,972 INFO L225 Difference]: With dead ends: 205 [2020-08-21 22:49:15,972 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 22:49:15,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:49:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 22:49:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-08-21 22:49:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 22:49:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-08-21 22:49:16,052 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 53 [2020-08-21 22:49:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:49:16,053 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-08-21 22:49:16,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:49:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-08-21 22:49:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 22:49:16,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:16,064 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 22:49:16,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:49:16,064 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1617309652, now seen corresponding path program 1 times [2020-08-21 22:49:16,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:16,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269325115] [2020-08-21 22:49:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,405 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:49:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:49:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:49:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:49:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:49:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:49:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:49:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:49:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 22:49:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:16,506 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 22:49:16,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269325115] [2020-08-21 22:49:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:49:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:49:16,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864151709] [2020-08-21 22:49:16,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:49:16,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:49:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:49:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:49:16,509 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 8 states. [2020-08-21 22:49:16,871 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:49:17,171 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:17,408 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:17,633 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:18,356 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:49:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:49:19,908 INFO L93 Difference]: Finished difference Result 390 states and 482 transitions. [2020-08-21 22:49:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:49:19,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-21 22:49:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:49:19,916 INFO L225 Difference]: With dead ends: 390 [2020-08-21 22:49:19,916 INFO L226 Difference]: Without dead ends: 303 [2020-08-21 22:49:19,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:49:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-08-21 22:49:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2020-08-21 22:49:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 22:49:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2020-08-21 22:49:20,000 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 58 [2020-08-21 22:49:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:49:20,000 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2020-08-21 22:49:20,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:49:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2020-08-21 22:49:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 22:49:20,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:20,002 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 22:49:20,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:49:20,003 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1904985657, now seen corresponding path program 1 times [2020-08-21 22:49:20,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:20,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446170702] [2020-08-21 22:49:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,267 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:49:20,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:49:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:49:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:49:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:49:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:49:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:49:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:49:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:49:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 22:49:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:20,347 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 22:49:20,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446170702] [2020-08-21 22:49:20,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:49:20,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:49:20,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884347226] [2020-08-21 22:49:20,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:49:20,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:49:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:49:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:49:20,350 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand 8 states. [2020-08-21 22:49:20,825 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:49:22,143 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:22,458 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:22,743 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:49:23,019 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:49:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:49:23,607 INFO L93 Difference]: Finished difference Result 741 states and 971 transitions. [2020-08-21 22:49:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:49:23,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 22:49:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:49:23,615 INFO L225 Difference]: With dead ends: 741 [2020-08-21 22:49:23,615 INFO L226 Difference]: Without dead ends: 523 [2020-08-21 22:49:23,617 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 22:49:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-08-21 22:49:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2020-08-21 22:49:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-21 22:49:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 563 transitions. [2020-08-21 22:49:23,774 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 563 transitions. Word has length 63 [2020-08-21 22:49:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:49:23,774 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 563 transitions. [2020-08-21 22:49:23,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:49:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 563 transitions. [2020-08-21 22:49:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:49:23,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:23,777 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 22:49:23,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:49:23,778 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1824895917, now seen corresponding path program 1 times [2020-08-21 22:49:23,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:23,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894082440] [2020-08-21 22:49:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,035 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:49:24,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:49:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:49:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:49:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:49:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:49:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:49:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:49:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 22:49:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 22:49:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 22:49:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:49:24,130 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 22:49:24,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894082440] [2020-08-21 22:49:24,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:49:24,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:49:24,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219884729] [2020-08-21 22:49:24,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:49:24,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:49:24,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:49:24,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:49:24,133 INFO L87 Difference]: Start difference. First operand 457 states and 563 transitions. Second operand 6 states. [2020-08-21 22:49:24,423 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:49:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:49:25,207 INFO L93 Difference]: Finished difference Result 806 states and 1047 transitions. [2020-08-21 22:49:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:49:25,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-21 22:49:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:49:25,214 INFO L225 Difference]: With dead ends: 806 [2020-08-21 22:49:25,214 INFO L226 Difference]: Without dead ends: 373 [2020-08-21 22:49:25,216 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 22:49:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-21 22:49:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 323. [2020-08-21 22:49:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 22:49:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 374 transitions. [2020-08-21 22:49:25,282 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 374 transitions. Word has length 67 [2020-08-21 22:49:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:49:25,283 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 374 transitions. [2020-08-21 22:49:25,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:49:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 374 transitions. [2020-08-21 22:49:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:49:25,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:49:25,285 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 22:49:25,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:49:25,285 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:49:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:49:25,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2047531853, now seen corresponding path program 1 times [2020-08-21 22:49:25,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:49:25,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966571520] [2020-08-21 22:49:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:49:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:49:25,342 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:49:25,342 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:49:25,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:49:25,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:49:25 BoogieIcfgContainer [2020-08-21 22:49:25,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:49:25,374 INFO L168 Benchmark]: Toolchain (without parser) took 15385.53 ms. Allocated memory was 148.9 MB in the beginning and 464.5 MB in the end (delta: 315.6 MB). Free memory was 103.7 MB in the beginning and 331.4 MB in the end (delta: -227.8 MB). Peak memory consumption was 87.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:49:25,375 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:49:25,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 867.77 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 173.5 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:49:25,377 INFO L168 Benchmark]: Boogie Preprocessor took 96.84 ms. Allocated memory is still 206.0 MB. Free memory was 173.5 MB in the beginning and 169.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:49:25,378 INFO L168 Benchmark]: RCFGBuilder took 1150.40 ms. Allocated memory was 206.0 MB in the beginning and 232.3 MB in the end (delta: 26.2 MB). Free memory was 169.7 MB in the beginning and 188.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 79.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:49:25,379 INFO L168 Benchmark]: TraceAbstraction took 13265.13 ms. Allocated memory was 232.3 MB in the beginning and 464.5 MB in the end (delta: 232.3 MB). Free memory was 188.8 MB in the beginning and 331.4 MB in the end (delta: -142.6 MB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:49:25,382 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 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 867.77 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 173.5 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.84 ms. Allocated memory is still 206.0 MB. Free memory was 173.5 MB in the beginning and 169.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1150.40 ms. Allocated memory was 206.0 MB in the beginning and 232.3 MB in the end (delta: 26.2 MB). Free memory was 169.7 MB in the beginning and 188.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 79.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13265.13 ms. Allocated memory was 232.3 MB in the beginning and 464.5 MB in the end (delta: 232.3 MB). Free memory was 188.8 MB in the beginning and 331.4 MB in the end (delta: -142.6 MB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 545]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L89] int pumpRunning = 0; [L90] int systemActive = 1; [L356] int waterLevel = 1; [L357] int methaneLevelCritical = 0; [L445] int cleanupTimeShifts = 4; [L753] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L518] int retValue_acc ; [L519] int tmp ; [L523] FCALL select_helpers() [L524] FCALL select_features() [L525] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L525] RET, EXPR valid_product() [L525] tmp = valid_product() [L527] COND TRUE \read(tmp) [L529] FCALL setup() [L530] CALL runTest() [L512] CALL test() [L287] int splverifierCounter ; [L288] int tmp ; [L289] int tmp___0 ; [L290] int tmp___1 ; [L291] int tmp___2 ; [L294] splverifierCounter = 0 [L296] COND TRUE 1 [L298] COND TRUE splverifierCounter < 4 [L304] tmp = __VERIFIER_nondet_int() [L306] COND TRUE \read(tmp) [L308] CALL waterRise() [L374] COND TRUE waterLevel < 2 [L375] waterLevel = waterLevel + 1 [L308] RET waterRise() [L314] tmp___0 = __VERIFIER_nondet_int() [L316] COND FALSE !(\read(tmp___0)) [L324] tmp___2 = __VERIFIER_nondet_int() [L326] COND FALSE !(\read(tmp___2)) [L332] tmp___1 = __VERIFIER_nondet_int() [L334] COND TRUE \read(tmp___1) [L336] CALL stopSystem() [L263] COND FALSE !(\read(pumpRunning)) [L270] systemActive = 0 [L336] RET stopSystem() [L343] CALL timeShift() [L97] COND FALSE !(\read(pumpRunning)) [L104] COND FALSE !(\read(systemActive)) [L112] CALL __utac_acc__Specification3_spec__1() [L551] int tmp ; [L552] int tmp___0 ; [L553] int tmp___1 ; [L557] CALL, EXPR isMethaneLevelCritical() [L395] int retValue_acc ; [L398] retValue_acc = methaneLevelCritical [L399] return (retValue_acc); [L557] RET, EXPR isMethaneLevelCritical() [L557] tmp = isMethaneLevelCritical() [L559] COND FALSE !(\read(tmp)) [L563] CALL, EXPR getWaterLevel() [L427] int retValue_acc ; [L430] retValue_acc = waterLevel [L431] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp___0 = getWaterLevel() [L565] COND TRUE tmp___0 == 2 [L567] CALL, EXPR isPumpRunning() [L196] int retValue_acc ; [L199] retValue_acc = pumpRunning [L200] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___1 = isPumpRunning() [L569] COND FALSE !(\read(tmp___1)) [L573] CALL __automaton_fail() [L545] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 234 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 533 SDtfs, 833 SDslu, 413 SDs, 0 SdLazy, 1915 SolverSat, 543 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, 3.9s 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: 0.4s 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...