/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=SMALLESTAMONGWIDE --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 [2020-08-22 03:40:54,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:40:54,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:40:54,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:40:54,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:40:54,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:40:54,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:40:54,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:40:54,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:40:54,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:40:54,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:40:54,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:40:54,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:40:54,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:40:54,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:40:54,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:40:54,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:40:54,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:40:54,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:40:54,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:40:54,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:40:54,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:40:54,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:40:54,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:40:54,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:40:54,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:40:54,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:40:54,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:40:54,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:40:54,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:40:54,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:40:54,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:40:54,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:40:54,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:40:54,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:40:54,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:40:54,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:40:54,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:40:54,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:40:54,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:40:54,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:40:54,880 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 [2020-08-22 03:40:54,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:40:54,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:40:54,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:40:54,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:40:54,934 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:40:54,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:40:54,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:40:54,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:40:54,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:40:54,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:40:54,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:40:54,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:40:54,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:40:54,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:40:54,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:40:54,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:40:54,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:40:54,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:40:54,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:40:54,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:40:54,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:40:54,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:40:54,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:40:54,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:40:54,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:40:54,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:40:54,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:40:54,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:40:54,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:40:54,939 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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:40:55,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:40:55,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:40:55,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:40:55,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:40:55,290 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:40:55,291 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-22 03:40:55,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2ec35a89/8227b585f7a24df38eff0a409680d464/FLAG2a11d6871 [2020-08-22 03:40:55,907 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:40:55,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product28.cil.c [2020-08-22 03:40:55,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2ec35a89/8227b585f7a24df38eff0a409680d464/FLAG2a11d6871 [2020-08-22 03:40:56,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2ec35a89/8227b585f7a24df38eff0a409680d464 [2020-08-22 03:40:56,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:40:56,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:40:56,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:40:56,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:40:56,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:40:56,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fce318a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56, skipping insertion in model container [2020-08-22 03:40:56,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:40:56,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:40:56,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:40:56,677 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:40:56,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:40:56,795 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:40:56,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56 WrapperNode [2020-08-22 03:40:56,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:40:56,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:40:56,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:40:56,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:40:56,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (1/1) ... [2020-08-22 03:40:56,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:40:56,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:40:56,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:40:56,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:40:56,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (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 [2020-08-22 03:40:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:40:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:40:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 03:40:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 03:40:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 03:40:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 03:40:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 03:40:56,959 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 03:40:56,959 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 03:40:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 03:40:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-22 03:40:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 03:40:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 03:40:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 03:40:56,961 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 03:40:56,961 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 03:40:56,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-22 03:40:56,962 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-22 03:40:56,962 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 03:40:56,962 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 03:40:56,963 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 03:40:56,963 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 03:40:56,963 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 03:40:56,963 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 03:40:56,963 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 03:40:56,965 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 03:40:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-22 03:40:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 03:40:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 03:40:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 03:40:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 03:40:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:40:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 03:40:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-22 03:40:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 03:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 03:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 03:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 03:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 03:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 03:40:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:40:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:40:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 03:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-22 03:40:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 03:40:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 03:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 03:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 03:40:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 03:40:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:40:58,038 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:40:58,039 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 03:40:58,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:40:58 BoogieIcfgContainer [2020-08-22 03:40:58,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:40:58,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:40:58,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:40:58,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:40:58,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:40:56" (1/3) ... [2020-08-22 03:40:58,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6385a005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:40:58, skipping insertion in model container [2020-08-22 03:40:58,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:40:56" (2/3) ... [2020-08-22 03:40:58,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6385a005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:40:58, skipping insertion in model container [2020-08-22 03:40:58,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:40:58" (3/3) ... [2020-08-22 03:40:58,054 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product28.cil.c [2020-08-22 03:40:58,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:40:58,074 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:40:58,088 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:40:58,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:40:58,110 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:40:58,110 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:40:58,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:40:58,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:40:58,111 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:40:58,111 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:40:58,111 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:40:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-08-22 03:40:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 03:40:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:40:58,148 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] [2020-08-22 03:40:58,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:40:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:40:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1443511359, now seen corresponding path program 1 times [2020-08-22 03:40:58,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:40:58,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707278474] [2020-08-22 03:40:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:40:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,842 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:40:58,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:40:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:40:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:40:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:40:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:40:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 03:40:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 03:40:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 03:40:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:40:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:40:58,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707278474] [2020-08-22 03:40:58,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:40:58,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:40:58,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177267129] [2020-08-22 03:40:58,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:40:58,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:40:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:40:58,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:40:58,991 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 3 states. [2020-08-22 03:41:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:41:00,023 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2020-08-22 03:41:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:41:00,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-22 03:41:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:41:00,041 INFO L225 Difference]: With dead ends: 282 [2020-08-22 03:41:00,041 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 03:41:00,046 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 [2020-08-22 03:41:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 03:41:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-22 03:41:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 03:41:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-22 03:41:00,130 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 52 [2020-08-22 03:41:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:41:00,130 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-22 03:41:00,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:41:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-22 03:41:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 03:41:00,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:41:00,134 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] [2020-08-22 03:41:00,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:41:00,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:41:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:41:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash 880615085, now seen corresponding path program 1 times [2020-08-22 03:41:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:41:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993453362] [2020-08-22 03:41:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:41:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,565 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:41:00,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:41:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:41:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:41:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:41:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:41:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:41:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 03:41:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 03:41:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:41:00,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993453362] [2020-08-22 03:41:00,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:41:00,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:41:00,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776604778] [2020-08-22 03:41:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:41:00,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:41:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:41:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:41:00,610 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 4 states. [2020-08-22 03:41:01,069 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:41:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:41:01,813 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2020-08-22 03:41:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:41:01,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-22 03:41:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:41:01,818 INFO L225 Difference]: With dead ends: 205 [2020-08-22 03:41:01,818 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 03:41:01,820 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 [2020-08-22 03:41:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 03:41:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-08-22 03:41:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 03:41:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-08-22 03:41:01,858 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 53 [2020-08-22 03:41:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:41:01,858 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-08-22 03:41:01,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:41:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-08-22 03:41:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 03:41:01,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:41:01,861 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] [2020-08-22 03:41:01,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:41:01,862 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:41:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:41:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1617309652, now seen corresponding path program 1 times [2020-08-22 03:41:01,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:41:01,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659329962] [2020-08-22 03:41:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:41:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,197 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:41:02,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:41:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:41:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:41:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:41:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:41:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 03:41:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 03:41:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 03:41:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:41:02,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659329962] [2020-08-22 03:41:02,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:41:02,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:41:02,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041935689] [2020-08-22 03:41:02,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:41:02,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:41:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:41:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:41:02,313 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 8 states. [2020-08-22 03:41:02,665 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:41:02,955 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:03,236 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:03,468 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:04,202 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:41:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:41:05,757 INFO L93 Difference]: Finished difference Result 390 states and 482 transitions. [2020-08-22 03:41:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:41:05,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-22 03:41:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:41:05,766 INFO L225 Difference]: With dead ends: 390 [2020-08-22 03:41:05,766 INFO L226 Difference]: Without dead ends: 303 [2020-08-22 03:41:05,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:41:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-08-22 03:41:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2020-08-22 03:41:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-22 03:41:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2020-08-22 03:41:05,843 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 58 [2020-08-22 03:41:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:41:05,843 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2020-08-22 03:41:05,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:41:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2020-08-22 03:41:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 03:41:05,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:41:05,847 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] [2020-08-22 03:41:05,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:41:05,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:41:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:41:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1904985657, now seen corresponding path program 1 times [2020-08-22 03:41:05,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:41:05,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81202225] [2020-08-22 03:41:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:41:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,163 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:41:06,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:41:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:41:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:41:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:41:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:41:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:41:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 03:41:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 03:41:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 03:41:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:41:06,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81202225] [2020-08-22 03:41:06,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:41:06,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:41:06,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675444891] [2020-08-22 03:41:06,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:41:06,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:41:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:41:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:41:06,267 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand 8 states. [2020-08-22 03:41:06,686 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:41:08,052 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:08,370 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:08,633 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:41:08,899 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:41:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:41:09,558 INFO L93 Difference]: Finished difference Result 741 states and 971 transitions. [2020-08-22 03:41:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:41:09,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 03:41:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:41:09,567 INFO L225 Difference]: With dead ends: 741 [2020-08-22 03:41:09,567 INFO L226 Difference]: Without dead ends: 523 [2020-08-22 03:41:09,570 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 [2020-08-22 03:41:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-08-22 03:41:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2020-08-22 03:41:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-22 03:41:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 563 transitions. [2020-08-22 03:41:09,683 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 563 transitions. Word has length 63 [2020-08-22 03:41:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:41:09,683 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 563 transitions. [2020-08-22 03:41:09,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:41:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 563 transitions. [2020-08-22 03:41:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:41:09,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:41:09,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:41:09,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:41:09,688 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:41:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:41:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1824895917, now seen corresponding path program 1 times [2020-08-22 03:41:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:41:09,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286157379] [2020-08-22 03:41:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:41:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:09,946 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:41:09,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:41:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:09,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:41:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:09,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:41:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:41:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:41:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:41:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 03:41:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 03:41:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 03:41:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 03:41:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:41:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:41:10,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286157379] [2020-08-22 03:41:10,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:41:10,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:41:10,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991066938] [2020-08-22 03:41:10,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:41:10,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:41:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:41:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:41:10,079 INFO L87 Difference]: Start difference. First operand 457 states and 563 transitions. Second operand 6 states. [2020-08-22 03:41:10,389 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:41:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:41:11,168 INFO L93 Difference]: Finished difference Result 806 states and 1047 transitions. [2020-08-22 03:41:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:41:11,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-22 03:41:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:41:11,175 INFO L225 Difference]: With dead ends: 806 [2020-08-22 03:41:11,175 INFO L226 Difference]: Without dead ends: 373 [2020-08-22 03:41:11,177 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 [2020-08-22 03:41:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-22 03:41:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 323. [2020-08-22 03:41:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 03:41:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 374 transitions. [2020-08-22 03:41:11,247 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 374 transitions. Word has length 67 [2020-08-22 03:41:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:41:11,248 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 374 transitions. [2020-08-22 03:41:11,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:41:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 374 transitions. [2020-08-22 03:41:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:41:11,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:41:11,250 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] [2020-08-22 03:41:11,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:41:11,251 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:41:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:41:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2047531853, now seen corresponding path program 1 times [2020-08-22 03:41:11,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:41:11,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588160970] [2020-08-22 03:41:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:41:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:41:11,308 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:41:11,309 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:41:11,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:41:11,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:41:11 BoogieIcfgContainer [2020-08-22 03:41:11,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:41:11,341 INFO L168 Benchmark]: Toolchain (without parser) took 15164.11 ms. Allocated memory was 147.3 MB in the beginning and 459.8 MB in the end (delta: 312.5 MB). Free memory was 102.5 MB in the beginning and 232.6 MB in the end (delta: -130.2 MB). Peak memory consumption was 182.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:41:11,344 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:41:11,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 618.20 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 172.4 MB in the end (delta: -70.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:41:11,349 INFO L168 Benchmark]: Boogie Preprocessor took 95.41 ms. Allocated memory is still 203.9 MB. Free memory was 172.4 MB in the beginning and 167.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:41:11,350 INFO L168 Benchmark]: RCFGBuilder took 1152.56 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 167.8 MB in the beginning and 199.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:41:11,351 INFO L168 Benchmark]: TraceAbstraction took 13293.10 ms. Allocated memory was 237.5 MB in the beginning and 459.8 MB in the end (delta: 222.3 MB). Free memory was 197.9 MB in the beginning and 232.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 187.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:41:11,355 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 618.20 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 172.4 MB in the end (delta: -70.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.41 ms. Allocated memory is still 203.9 MB. Free memory was 172.4 MB in the beginning and 167.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1152.56 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 167.8 MB in the beginning and 199.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13293.10 ms. Allocated memory was 237.5 MB in the beginning and 459.8 MB in the end (delta: 222.3 MB). Free memory was 197.9 MB in the beginning and 232.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 187.5 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: 13.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 10.1s, 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, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=457occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 236 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s 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...