/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product59.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:59:04,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:59:04,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:59:04,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:59:04,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:59:04,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:59:04,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:59:04,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:59:04,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:59:04,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:59:04,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:59:04,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:59:04,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:59:04,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:59:04,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:59:04,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:59:04,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:59:04,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:59:04,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:59:04,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:59:04,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:59:04,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:59:04,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:59:04,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:59:04,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:59:04,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:59:04,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:59:04,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:59:04,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:59:04,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:59:04,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:59:04,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:59:04,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:59:04,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:59:04,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:59:04,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:59:04,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:59:04,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:59:04,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:59:04,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:59:04,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:59:04,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:59:04,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:59:04,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:59:04,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:59:04,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:59:04,966 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:59:04,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:59:04,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:59:04,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:59:04,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:59:04,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:59:04,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:59:04,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:59:04,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:59:04,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:59:04,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:59:04,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:59:04,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:59:04,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:59:04,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:59:04,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:59:04,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:59:04,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:59:04,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:59:04,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:59:04,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:59:04,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:59:04,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:59:04,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:59:04,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:59:04,971 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:59:05,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:59:05,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:59:05,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:59:05,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:59:05,281 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:59:05,282 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product59.cil.c [2020-08-18 11:59:05,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fee8f87b7/3d34defd4f63404fae059da2536b3a1b/FLAG0a16546e7 [2020-08-18 11:59:05,932 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:59:05,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product59.cil.c [2020-08-18 11:59:05,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fee8f87b7/3d34defd4f63404fae059da2536b3a1b/FLAG0a16546e7 [2020-08-18 11:59:06,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fee8f87b7/3d34defd4f63404fae059da2536b3a1b [2020-08-18 11:59:06,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:59:06,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:59:06,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:59:06,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:59:06,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:59:06,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115854be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06, skipping insertion in model container [2020-08-18 11:59:06,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:59:06,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:59:06,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:59:06,667 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:59:06,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:59:06,811 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:59:06,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06 WrapperNode [2020-08-18 11:59:06,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:59:06,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:59:06,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:59:06,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:59:06,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... [2020-08-18 11:59:06,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:59:06,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:59:06,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:59:06,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:59:06,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:59:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:59:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:59:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:59:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:59:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:59:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:59:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:59:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:59:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:59:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:59:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:59:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:59:06,996 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:59:06,996 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:59:06,996 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:59:06,997 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 11:59:06,997 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 11:59:06,997 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:59:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:59:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:59:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:59:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:59:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:59:06,999 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:59:06,999 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:59:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:59:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 11:59:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:59:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:59:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:59:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:59:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:59:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:59:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:59:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 11:59:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 11:59:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 11:59:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:59:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:59:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:59:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:59:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:59:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:59:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:59:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:59:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:59:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:59:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:59:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:59:07,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:59:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:59:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:59:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:59:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 11:59:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 11:59:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:59:07,011 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:59:07,012 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:59:07,012 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:59:07,013 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:59:07,013 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:59:07,014 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:59:07,014 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:59:07,014 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:59:07,014 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:59:07,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:59:07,015 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 11:59:07,016 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:59:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:59:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:59:07,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:59:08,236 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:59:08,236 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:59:08,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:59:08 BoogieIcfgContainer [2020-08-18 11:59:08,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:59:08,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:59:08,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:59:08,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:59:08,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:59:06" (1/3) ... [2020-08-18 11:59:08,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa3eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:59:08, skipping insertion in model container [2020-08-18 11:59:08,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:59:06" (2/3) ... [2020-08-18 11:59:08,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa3eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:59:08, skipping insertion in model container [2020-08-18 11:59:08,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:59:08" (3/3) ... [2020-08-18 11:59:08,256 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product59.cil.c [2020-08-18 11:59:08,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:59:08,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:59:08,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:59:08,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:59:08,317 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:59:08,317 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:59:08,317 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:59:08,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:59:08,318 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:59:08,318 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:59:08,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:59:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states. [2020-08-18 11:59:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 11:59:08,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:08,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:59:08,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2059475727, now seen corresponding path program 1 times [2020-08-18 11:59:08,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:08,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146318953] [2020-08-18 11:59:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,039 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:59:09,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:59:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:59:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:59:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:59:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:59:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:59:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:59:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 11:59:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:59:09,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146318953] [2020-08-18 11:59:09,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:59:09,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:59:09,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754737831] [2020-08-18 11:59:09,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:59:09,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:59:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:59:09,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:59:09,211 INFO L87 Difference]: Start difference. First operand 195 states. Second operand 3 states. [2020-08-18 11:59:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:59:10,489 INFO L93 Difference]: Finished difference Result 349 states and 451 transitions. [2020-08-18 11:59:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:59:10,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 11:59:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:59:10,506 INFO L225 Difference]: With dead ends: 349 [2020-08-18 11:59:10,506 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 11:59:10,511 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 [2020-08-18 11:59:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 11:59:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 152. [2020-08-18 11:59:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-18 11:59:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-08-18 11:59:10,624 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 52 [2020-08-18 11:59:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:59:10,625 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-08-18 11:59:10,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:59:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-08-18 11:59:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 11:59:10,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:10,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:59:10,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:59:10,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 342362752, now seen corresponding path program 1 times [2020-08-18 11:59:10,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751971879] [2020-08-18 11:59:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,008 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:59:11,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:59:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:59:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:59:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:59:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:59:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:59:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:59:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 11:59:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:59:11,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751971879] [2020-08-18 11:59:11,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:59:11,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:59:11,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895845659] [2020-08-18 11:59:11,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:59:11,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:59:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:59:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:59:11,063 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 4 states. [2020-08-18 11:59:11,498 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:59:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:59:12,489 INFO L93 Difference]: Finished difference Result 276 states and 334 transitions. [2020-08-18 11:59:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:59:12,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 11:59:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:59:12,494 INFO L225 Difference]: With dead ends: 276 [2020-08-18 11:59:12,494 INFO L226 Difference]: Without dead ends: 172 [2020-08-18 11:59:12,496 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 11:59:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-18 11:59:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2020-08-18 11:59:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 11:59:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2020-08-18 11:59:12,561 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 53 [2020-08-18 11:59:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:59:12,562 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2020-08-18 11:59:12,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:59:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2020-08-18 11:59:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:59:12,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:12,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:59:12,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:59:12,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash -970398275, now seen corresponding path program 1 times [2020-08-18 11:59:12,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:12,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948055345] [2020-08-18 11:59:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,921 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:59:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:59:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:59:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:59:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:59:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:59:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:12,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:59:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:13,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:59:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:13,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:59:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:59:13,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948055345] [2020-08-18 11:59:13,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:59:13,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:59:13,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081048472] [2020-08-18 11:59:13,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:59:13,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:59:13,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:59:13,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:59:13,021 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand 8 states. [2020-08-18 11:59:13,442 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:59:13,757 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:13,993 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:14,215 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:14,919 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:59:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:59:16,988 INFO L93 Difference]: Finished difference Result 491 states and 604 transitions. [2020-08-18 11:59:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:59:16,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 11:59:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:59:16,995 INFO L225 Difference]: With dead ends: 491 [2020-08-18 11:59:16,996 INFO L226 Difference]: Without dead ends: 372 [2020-08-18 11:59:16,997 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 11:59:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-18 11:59:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2020-08-18 11:59:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-08-18 11:59:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 373 transitions. [2020-08-18 11:59:17,082 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 373 transitions. Word has length 57 [2020-08-18 11:59:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:59:17,082 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 373 transitions. [2020-08-18 11:59:17,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:59:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 373 transitions. [2020-08-18 11:59:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 11:59:17,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:17,084 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 11:59:17,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:59:17,085 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash -542420815, now seen corresponding path program 1 times [2020-08-18 11:59:17,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:17,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19733171] [2020-08-18 11:59:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,433 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:59:17,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:59:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:59:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:59:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:59:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:59:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:59:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:59:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:59:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 11:59:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:59:17,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19733171] [2020-08-18 11:59:17,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:59:17,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:59:17,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474065727] [2020-08-18 11:59:17,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:59:17,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:59:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:59:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:59:17,579 INFO L87 Difference]: Start difference. First operand 310 states and 373 transitions. Second operand 8 states. [2020-08-18 11:59:18,014 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:59:19,403 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:19,774 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:20,030 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:59:20,299 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:59:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:59:21,269 INFO L93 Difference]: Finished difference Result 958 states and 1241 transitions. [2020-08-18 11:59:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:59:21,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 11:59:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:59:21,276 INFO L225 Difference]: With dead ends: 958 [2020-08-18 11:59:21,277 INFO L226 Difference]: Without dead ends: 672 [2020-08-18 11:59:21,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:59:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-08-18 11:59:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 601. [2020-08-18 11:59:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-08-18 11:59:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 735 transitions. [2020-08-18 11:59:21,423 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 735 transitions. Word has length 63 [2020-08-18 11:59:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:59:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 735 transitions. [2020-08-18 11:59:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:59:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 735 transitions. [2020-08-18 11:59:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 11:59:21,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:21,427 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 11:59:21,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:59:21,428 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -785539273, now seen corresponding path program 1 times [2020-08-18 11:59:21,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090153393] [2020-08-18 11:59:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,748 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:59:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:59:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:59:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:59:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:59:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:59:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:59:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:59:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:59:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 11:59:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 11:59:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:59:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:59:21,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090153393] [2020-08-18 11:59:21,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:59:21,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:59:21,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630797589] [2020-08-18 11:59:21,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:59:21,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:59:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:59:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:59:21,817 INFO L87 Difference]: Start difference. First operand 601 states and 735 transitions. Second operand 6 states. [2020-08-18 11:59:22,253 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:59:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:59:24,084 INFO L93 Difference]: Finished difference Result 1408 states and 1818 transitions. [2020-08-18 11:59:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:59:24,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-18 11:59:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:59:24,091 INFO L225 Difference]: With dead ends: 1408 [2020-08-18 11:59:24,091 INFO L226 Difference]: Without dead ends: 831 [2020-08-18 11:59:24,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:59:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-18 11:59:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 761. [2020-08-18 11:59:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-08-18 11:59:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 924 transitions. [2020-08-18 11:59:24,241 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 924 transitions. Word has length 67 [2020-08-18 11:59:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:59:24,241 INFO L479 AbstractCegarLoop]: Abstraction has 761 states and 924 transitions. [2020-08-18 11:59:24,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:59:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 924 transitions. [2020-08-18 11:59:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 11:59:24,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:59:24,243 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 11:59:24,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:59:24,244 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:59:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:59:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1064344695, now seen corresponding path program 1 times [2020-08-18 11:59:24,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:59:24,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712326248] [2020-08-18 11:59:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:59:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:59:24,304 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:59:24,305 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:59:24,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:59:24,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:59:24 BoogieIcfgContainer [2020-08-18 11:59:24,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:59:24,342 INFO L168 Benchmark]: Toolchain (without parser) took 18153.82 ms. Allocated memory was 138.9 MB in the beginning and 536.9 MB in the end (delta: 397.9 MB). Free memory was 101.0 MB in the beginning and 201.2 MB in the end (delta: -100.1 MB). Peak memory consumption was 297.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,343 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.72 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.6 MB in the beginning and 168.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,345 INFO L168 Benchmark]: Boogie Preprocessor took 96.50 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 164.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,346 INFO L168 Benchmark]: RCFGBuilder took 1336.69 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 164.5 MB in the beginning and 190.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,346 INFO L168 Benchmark]: TraceAbstraction took 16092.74 ms. Allocated memory was 234.4 MB in the beginning and 536.9 MB in the end (delta: 302.5 MB). Free memory was 190.8 MB in the beginning and 201.2 MB in the end (delta: -10.4 MB). Peak memory consumption was 292.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:59:24,350 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 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 622.72 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 100.6 MB in the beginning and 168.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.50 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 164.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1336.69 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 164.5 MB in the beginning and 190.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16092.74 ms. Allocated memory was 234.4 MB in the beginning and 536.9 MB in the end (delta: 302.5 MB). Free memory was 190.8 MB in the beginning and 201.2 MB in the end (delta: -10.4 MB). Peak memory consumption was 292.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 694]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L414] int waterLevel = 1; [L415] int methaneLevelCritical = 0; [L517] int cleanupTimeShifts = 4; [L769] int pumpRunning = 0; [L770] int systemActive = 1; [L596] int retValue_acc ; [L597] int tmp ; [L601] FCALL select_helpers() [L602] FCALL select_features() [L603] CALL, EXPR valid_product() [L645] int retValue_acc ; [L648] retValue_acc = 1 [L649] return (retValue_acc); [L603] RET, EXPR valid_product() [L603] tmp = valid_product() [L605] COND TRUE \read(tmp) [L607] FCALL setup() [L608] CALL runTest() [L587] CALL test() [L701] int splverifierCounter ; [L702] int tmp ; [L703] int tmp___0 ; [L704] int tmp___1 ; [L705] int tmp___2 ; [L708] splverifierCounter = 0 [L710] COND TRUE 1 [L712] COND TRUE splverifierCounter < 4 [L718] tmp = __VERIFIER_nondet_int() [L720] COND TRUE \read(tmp) [L722] CALL waterRise() [L432] COND TRUE waterLevel < 2 [L433] waterLevel = waterLevel + 1 [L722] RET waterRise() [L728] tmp___0 = __VERIFIER_nondet_int() [L730] COND FALSE !(\read(tmp___0)) [L738] tmp___2 = __VERIFIER_nondet_int() [L740] COND FALSE !(\read(tmp___2)) [L744] tmp___1 = __VERIFIER_nondet_int() [L746] COND TRUE \read(tmp___1) [L748] CALL stopSystem() [L987] COND FALSE !(\read(pumpRunning)) [L994] systemActive = 0 [L748] RET stopSystem() [L755] CALL timeShift() [L776] COND FALSE !(\read(pumpRunning)) [L783] COND FALSE !(\read(systemActive)) [L791] CALL __utac_acc__Specification3_spec__1() [L657] int tmp ; [L658] int tmp___0 ; [L659] int tmp___1 ; [L663] CALL, EXPR isMethaneLevelCritical() [L453] int retValue_acc ; [L456] retValue_acc = methaneLevelCritical [L457] return (retValue_acc); [L663] RET, EXPR isMethaneLevelCritical() [L663] tmp = isMethaneLevelCritical() [L665] COND FALSE !(\read(tmp)) [L669] CALL, EXPR getWaterLevel() [L485] int retValue_acc ; [L488] retValue_acc = waterLevel [L489] return (retValue_acc); [L669] RET, EXPR getWaterLevel() [L669] tmp___0 = getWaterLevel() [L671] COND TRUE tmp___0 == 2 [L673] CALL, EXPR isPumpRunning() [L901] int retValue_acc ; [L904] retValue_acc = pumpRunning [L905] return (retValue_acc); [L673] RET, EXPR isPumpRunning() [L673] tmp___1 = isPumpRunning() [L675] COND FALSE !(\read(tmp___1)) [L679] CALL __automaton_fail() [L694] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 251 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 693 SDtfs, 1225 SDslu, 422 SDs, 0 SdLazy, 2565 SolverSat, 749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=761occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 5 MinimizatonAttempts, 268 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 82182 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...