/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -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 0.1.25-5644d1e-m [2020-08-18 17:43:02,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:43:02,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:43:02,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:43:02,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:43:02,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:43:02,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:43:02,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:43:02,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:43:02,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:43:02,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:43:02,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:43:02,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:43:02,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:43:02,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:43:02,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:43:02,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:43:02,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:43:02,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:43:02,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:43:02,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:43:02,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:43:02,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:43:02,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:43:02,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:43:02,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:43:02,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:43:02,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:43:02,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:43:02,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:43:02,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:43:02,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:43:02,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:43:02,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:43:02,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:43:02,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:43:02,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:43:02,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:43:02,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:43:02,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:43:02,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:43:02,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:43:02,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:43:02,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:43:02,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:43:02,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:43:02,707 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:43:02,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:43:02,708 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:43:02,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:43:02,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:43:02,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:43:02,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:43:02,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:43:02,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:43:02,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:43:02,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:43:02,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:43:02,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:43:02,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:43:02,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:43:02,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:43:02,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:43:02,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:43:02,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:43:02,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:43:02,712 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:43:02,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:43:03,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:43:03,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:43:03,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:43:03,017 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:43:03,018 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product20.cil.c [2020-08-18 17:43:03,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd019d5f7/51b2061c14ec4bd79767763dab500381/FLAGf6b95ae96 [2020-08-18 17:43:03,583 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:43:03,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product20.cil.c [2020-08-18 17:43:03,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd019d5f7/51b2061c14ec4bd79767763dab500381/FLAGf6b95ae96 [2020-08-18 17:43:03,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd019d5f7/51b2061c14ec4bd79767763dab500381 [2020-08-18 17:43:03,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:43:03,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:43:03,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:43:03,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:43:03,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:43:03,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:43:03" (1/1) ... [2020-08-18 17:43:03,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17979b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:03, skipping insertion in model container [2020-08-18 17:43:03,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:43:03" (1/1) ... [2020-08-18 17:43:03,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:43:03,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:43:04,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:43:04,289 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:43:04,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:43:04,589 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:43:04,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04 WrapperNode [2020-08-18 17:43:04,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:43:04,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:43:04,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:43:04,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:43:04,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... [2020-08-18 17:43:04,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:43:04,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:43:04,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:43:04,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:43:04,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:43:04,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:43:04,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 17:43:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 17:43:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 17:43:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 17:43:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 17:43:04,762 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 17:43:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 17:43:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 17:43:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 17:43:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 17:43:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 17:43:04,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 17:43:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:43:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:43:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 17:43:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 17:43:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 17:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 17:43:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 17:43:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 17:43:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 17:43:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 17:43:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 17:43:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 17:43:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 17:43:04,770 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 17:43:04,771 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 17:43:04,772 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 17:43:04,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:43:04,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 17:43:04,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:43:05,915 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:43:05,915 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 17:43:05,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:43:05 BoogieIcfgContainer [2020-08-18 17:43:05,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:43:05,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:43:05,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:43:05,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:43:05,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:43:03" (1/3) ... [2020-08-18 17:43:05,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcce891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:43:05, skipping insertion in model container [2020-08-18 17:43:05,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:04" (2/3) ... [2020-08-18 17:43:05,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcce891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:43:05, skipping insertion in model container [2020-08-18 17:43:05,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:43:05" (3/3) ... [2020-08-18 17:43:05,938 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product20.cil.c [2020-08-18 17:43:05,949 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:43:05,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:43:05,969 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:43:05,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:43:05,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:43:05,991 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:43:05,991 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:43:05,991 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:43:05,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:43:05,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:43:05,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:43:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-08-18 17:43:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 17:43:06,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:06,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:06,028 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1020125937, now seen corresponding path program 1 times [2020-08-18 17:43:06,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:06,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563049964] [2020-08-18 17:43:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,663 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:06,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 17:43:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:43:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:43:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:43:06,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563049964] [2020-08-18 17:43:06,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:06,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:43:06,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245016438] [2020-08-18 17:43:06,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:43:06,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:43:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:43:06,819 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 3 states. [2020-08-18 17:43:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:07,851 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2020-08-18 17:43:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:43:07,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 17:43:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:07,868 INFO L225 Difference]: With dead ends: 282 [2020-08-18 17:43:07,869 INFO L226 Difference]: Without dead ends: 153 [2020-08-18 17:43:07,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:43:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-18 17:43:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-18 17:43:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 17:43:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-18 17:43:07,959 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 52 [2020-08-18 17:43:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:07,959 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-18 17:43:07,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:43:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-18 17:43:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 17:43:07,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:07,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:07,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:43:07,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1976002315, now seen corresponding path program 1 times [2020-08-18 17:43:07,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:07,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703603661] [2020-08-18 17:43:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,289 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:08,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:43:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:43:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 17:43:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:43:08,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703603661] [2020-08-18 17:43:08,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:08,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:43:08,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433338642] [2020-08-18 17:43:08,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:43:08,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:08,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:43:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:43:08,385 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 4 states. [2020-08-18 17:43:08,794 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:43:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:09,477 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2020-08-18 17:43:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:43:09,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 17:43:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:09,480 INFO L225 Difference]: With dead ends: 205 [2020-08-18 17:43:09,481 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 17:43:09,482 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 [2020-08-18 17:43:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 17:43:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-08-18 17:43:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 17:43:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-08-18 17:43:09,518 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 53 [2020-08-18 17:43:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:09,519 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-08-18 17:43:09,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:43:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-08-18 17:43:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:43:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:09,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:09,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:43:09,522 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -979616740, now seen corresponding path program 1 times [2020-08-18 17:43:09,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:09,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691988088] [2020-08-18 17:43:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,844 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:09,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:43:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:43:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 17:43:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:43:09,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691988088] [2020-08-18 17:43:09,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:09,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:43:09,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280648802] [2020-08-18 17:43:09,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:43:09,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:43:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:43:09,961 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 8 states. [2020-08-18 17:43:10,317 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:10,633 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:10,885 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:11,130 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:11,883 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:43:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:13,495 INFO L93 Difference]: Finished difference Result 390 states and 482 transitions. [2020-08-18 17:43:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:43:13,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-18 17:43:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:13,504 INFO L225 Difference]: With dead ends: 390 [2020-08-18 17:43:13,505 INFO L226 Difference]: Without dead ends: 303 [2020-08-18 17:43:13,506 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 [2020-08-18 17:43:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-08-18 17:43:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2020-08-18 17:43:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-18 17:43:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2020-08-18 17:43:13,578 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 58 [2020-08-18 17:43:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:13,578 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2020-08-18 17:43:13,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:43:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2020-08-18 17:43:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 17:43:13,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:13,582 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] [2020-08-18 17:43:13,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:43:13,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1983050375, now seen corresponding path program 1 times [2020-08-18 17:43:13,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:13,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662640861] [2020-08-18 17:43:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,884 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:43:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:43:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:43:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 17:43:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:43:13,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662640861] [2020-08-18 17:43:13,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:13,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:43:13,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786552279] [2020-08-18 17:43:13,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:43:13,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:43:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:43:13,998 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand 8 states. [2020-08-18 17:43:14,386 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:15,699 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:16,048 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:16,309 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:16,562 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:17,218 INFO L93 Difference]: Finished difference Result 741 states and 971 transitions. [2020-08-18 17:43:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:43:17,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 17:43:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:17,228 INFO L225 Difference]: With dead ends: 741 [2020-08-18 17:43:17,228 INFO L226 Difference]: Without dead ends: 523 [2020-08-18 17:43:17,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:43:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-08-18 17:43:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2020-08-18 17:43:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-18 17:43:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 563 transitions. [2020-08-18 17:43:17,354 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 563 transitions. Word has length 63 [2020-08-18 17:43:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:17,355 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 563 transitions. [2020-08-18 17:43:17,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:43:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 563 transitions. [2020-08-18 17:43:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 17:43:17,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:17,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:17,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:43:17,358 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash -572770771, now seen corresponding path program 1 times [2020-08-18 17:43:17,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:17,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600898375] [2020-08-18 17:43:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,620 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:17,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:43:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:43:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 17:43:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 17:43:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 17:43:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:43:17,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600898375] [2020-08-18 17:43:17,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:17,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:43:17,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985753393] [2020-08-18 17:43:17,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:43:17,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:43:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:43:17,710 INFO L87 Difference]: Start difference. First operand 457 states and 563 transitions. Second operand 6 states. [2020-08-18 17:43:18,050 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:18,913 INFO L93 Difference]: Finished difference Result 806 states and 1047 transitions. [2020-08-18 17:43:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:43:18,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-18 17:43:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:18,917 INFO L225 Difference]: With dead ends: 806 [2020-08-18 17:43:18,917 INFO L226 Difference]: Without dead ends: 373 [2020-08-18 17:43:18,920 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 [2020-08-18 17:43:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-18 17:43:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 323. [2020-08-18 17:43:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 17:43:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 374 transitions. [2020-08-18 17:43:18,977 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 374 transitions. Word has length 67 [2020-08-18 17:43:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:18,977 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 374 transitions. [2020-08-18 17:43:18,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:43:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 374 transitions. [2020-08-18 17:43:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 17:43:18,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:18,979 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] [2020-08-18 17:43:18,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:43:18,980 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash 935934029, now seen corresponding path program 1 times [2020-08-18 17:43:18,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:18,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779547913] [2020-08-18 17:43:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:43:19,035 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:43:19,036 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:43:19,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:43:19,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:43:19 BoogieIcfgContainer [2020-08-18 17:43:19,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:43:19,068 INFO L168 Benchmark]: Toolchain (without parser) took 15196.16 ms. Allocated memory was 140.0 MB in the beginning and 469.8 MB in the end (delta: 329.8 MB). Free memory was 102.3 MB in the beginning and 292.6 MB in the end (delta: -190.3 MB). Peak memory consumption was 139.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:19,069 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:43:19,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.45 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 173.5 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:19,071 INFO L168 Benchmark]: Boogie Preprocessor took 97.38 ms. Allocated memory is still 203.9 MB. Free memory was 173.5 MB in the beginning and 169.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:19,072 INFO L168 Benchmark]: RCFGBuilder took 1239.67 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 169.3 MB in the beginning and 200.8 MB in the end (delta: -31.5 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:19,073 INFO L168 Benchmark]: TraceAbstraction took 13135.13 ms. Allocated memory was 237.5 MB in the beginning and 469.8 MB in the end (delta: 232.3 MB). Free memory was 199.3 MB in the beginning and 292.6 MB in the end (delta: -93.3 MB). Peak memory consumption was 139.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:19,077 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 714.45 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 173.5 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.38 ms. Allocated memory is still 203.9 MB. Free memory was 173.5 MB in the beginning and 169.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1239.67 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 169.3 MB in the beginning and 200.8 MB in the end (delta: -31.5 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13135.13 ms. Allocated memory was 237.5 MB in the beginning and 469.8 MB in the end (delta: 232.3 MB). Free memory was 199.3 MB in the beginning and 292.6 MB in the end (delta: -93.3 MB). Peak memory consumption was 139.0 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, 5.7s 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, 0.2s SatisfiabilityAnalysisTime, 1.8s 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...