/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=DEEPEST --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_spec1_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:20:01,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:20:01,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:20:01,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:20:01,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:20:01,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:20:01,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:20:01,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:20:01,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:20:01,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:20:01,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:20:01,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:20:01,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:20:01,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:20:01,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:20:01,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:20:01,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:20:01,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:20:01,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:20:01,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:20:01,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:20:01,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:20:01,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:20:01,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:20:01,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:20:01,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:20:01,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:20:01,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:20:01,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:20:01,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:20:01,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:20:01,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:20:01,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:20:01,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:20:01,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:20:01,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:20:01,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:20:01,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:20:01,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:20:01,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:20:01,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:20:01,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:20:02,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:20:02,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:20:02,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:20:02,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:20:02,020 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:20:02,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:20:02,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:20:02,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:20:02,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:20:02,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:20:02,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:20:02,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:20:02,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:20:02,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:20:02,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:20:02,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:20:02,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:20:02,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:20:02,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:20:02,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:20:02,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:20:02,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:20:02,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:20:02,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:20:02,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:20:02,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:20:02,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:20:02,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:20:02,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:20:02,025 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=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:20:02,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:20:02,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:20:02,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:20:02,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:20:02,362 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:20:02,363 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product50.cil.c [2020-08-21 20:20:02,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71cd92ec8/db171f89537c4785ba0fc3b358b0ba22/FLAG719fdd53e [2020-08-21 20:20:02,983 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:20:02,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product50.cil.c [2020-08-21 20:20:03,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71cd92ec8/db171f89537c4785ba0fc3b358b0ba22/FLAG719fdd53e [2020-08-21 20:20:03,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71cd92ec8/db171f89537c4785ba0fc3b358b0ba22 [2020-08-21 20:20:03,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:20:03,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:20:03,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:20:03,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:20:03,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:20:03,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cafb76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03, skipping insertion in model container [2020-08-21 20:20:03,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:20:03,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:20:03,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:20:03,779 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:20:03,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:20:03,891 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:20:03,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03 WrapperNode [2020-08-21 20:20:03,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:20:03,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:20:03,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:20:03,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:20:03,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... [2020-08-21 20:20:03,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:20:03,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:20:03,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:20:03,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:20:03,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:20:04,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:20:04,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:20:04,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 20:20:04,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 20:20:04,074 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 20:20:04,075 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 20:20:04,075 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 20:20:04,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 20:20:04,075 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 20:20:04,076 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 20:20:04,077 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 20:20:04,077 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 20:20:04,077 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 20:20:04,077 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 20:20:04,077 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 20:20:04,078 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 20:20:04,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:20:04,079 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 20:20:04,079 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 20:20:04,080 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 20:20:04,081 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 20:20:04,082 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 20:20:04,083 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 20:20:04,083 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 20:20:04,083 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 20:20:04,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 20:20:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 20:20:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 20:20:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 20:20:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 20:20:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 20:20:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:20:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:20:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 20:20:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 20:20:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 20:20:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 20:20:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 20:20:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 20:20:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 20:20:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 20:20:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 20:20:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 20:20:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 20:20:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 20:20:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 20:20:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 20:20:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 20:20:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:20:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 20:20:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:20:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:20:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:20:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 20:20:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 20:20:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 20:20:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:20:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 20:20:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:20:05,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:20:05,242 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 20:20:05,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:20:05 BoogieIcfgContainer [2020-08-21 20:20:05,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:20:05,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:20:05,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:20:05,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:20:05,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:20:03" (1/3) ... [2020-08-21 20:20:05,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbdc96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:20:05, skipping insertion in model container [2020-08-21 20:20:05,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:20:03" (2/3) ... [2020-08-21 20:20:05,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbdc96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:20:05, skipping insertion in model container [2020-08-21 20:20:05,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:20:05" (3/3) ... [2020-08-21 20:20:05,262 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product50.cil.c [2020-08-21 20:20:05,273 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:20:05,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:20:05,295 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:20:05,315 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:20:05,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:20:05,316 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:20:05,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:20:05,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:20:05,316 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:20:05,316 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:20:05,317 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:20:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states. [2020-08-21 20:20:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 20:20:05,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:05,350 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] [2020-08-21 20:20:05,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1040081704, now seen corresponding path program 1 times [2020-08-21 20:20:05,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:05,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254059013] [2020-08-21 20:20:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,047 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:20:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 20:20:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:06,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254059013] [2020-08-21 20:20:06,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:06,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:20:06,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627135698] [2020-08-21 20:20:06,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:20:06,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:20:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:20:06,168 INFO L87 Difference]: Start difference. First operand 178 states. Second operand 3 states. [2020-08-21 20:20:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:07,295 INFO L93 Difference]: Finished difference Result 306 states and 398 transitions. [2020-08-21 20:20:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:20:07,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 20:20:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:07,311 INFO L225 Difference]: With dead ends: 306 [2020-08-21 20:20:07,312 INFO L226 Difference]: Without dead ends: 165 [2020-08-21 20:20:07,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:20:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-21 20:20:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-08-21 20:20:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 20:20:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-08-21 20:20:07,443 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 46 [2020-08-21 20:20:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:07,444 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-08-21 20:20:07,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:20:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-08-21 20:20:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 20:20:07,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:07,451 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] [2020-08-21 20:20:07,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:20:07,451 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -849158610, now seen corresponding path program 1 times [2020-08-21 20:20:07,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:07,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322636397] [2020-08-21 20:20:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,778 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:07,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:20:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 20:20:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:07,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322636397] [2020-08-21 20:20:07,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:07,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:20:07,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088283210] [2020-08-21 20:20:07,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:20:07,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:20:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:20:07,821 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 4 states. [2020-08-21 20:20:08,229 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:09,064 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2020-08-21 20:20:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:20:09,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 20:20:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:09,074 INFO L225 Difference]: With dead ends: 235 [2020-08-21 20:20:09,076 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 20:20:09,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:20:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 20:20:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-21 20:20:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 20:20:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-08-21 20:20:09,119 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 47 [2020-08-21 20:20:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:09,120 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-08-21 20:20:09,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:20:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-08-21 20:20:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 20:20:09,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:09,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:09,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:20:09,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash 846018297, now seen corresponding path program 1 times [2020-08-21 20:20:09,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:09,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258184480] [2020-08-21 20:20:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,442 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 20:20:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:20:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:09,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258184480] [2020-08-21 20:20:09,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:09,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:20:09,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020294786] [2020-08-21 20:20:09,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:20:09,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:20:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:20:09,559 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 8 states. [2020-08-21 20:20:09,898 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:10,224 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:10,449 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:10,666 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:11,784 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2020-08-21 20:20:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:20:11,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 20:20:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:11,788 INFO L225 Difference]: With dead ends: 248 [2020-08-21 20:20:11,788 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 20:20:11,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:20:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 20:20:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-21 20:20:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 20:20:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-08-21 20:20:11,822 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 52 [2020-08-21 20:20:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:11,822 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-08-21 20:20:11,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:20:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-08-21 20:20:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 20:20:11,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:11,825 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] [2020-08-21 20:20:11,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:20:11,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1478840967, now seen corresponding path program 1 times [2020-08-21 20:20:11,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:11,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272268383] [2020-08-21 20:20:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,117 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:12,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 20:20:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 20:20:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 20:20:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:12,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272268383] [2020-08-21 20:20:12,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:12,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:20:12,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187109701] [2020-08-21 20:20:12,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:20:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:20:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:20:12,227 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 6 states. [2020-08-21 20:20:12,524 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:13,597 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:14,246 INFO L93 Difference]: Finished difference Result 345 states and 425 transitions. [2020-08-21 20:20:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:20:14,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 20:20:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:14,250 INFO L225 Difference]: With dead ends: 345 [2020-08-21 20:20:14,250 INFO L226 Difference]: Without dead ends: 246 [2020-08-21 20:20:14,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:20:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-21 20:20:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2020-08-21 20:20:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-21 20:20:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 230 transitions. [2020-08-21 20:20:14,316 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 230 transitions. Word has length 65 [2020-08-21 20:20:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:14,317 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 230 transitions. [2020-08-21 20:20:14,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:20:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 230 transitions. [2020-08-21 20:20:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 20:20:14,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:14,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:14,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:20:14,319 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1284194314, now seen corresponding path program 1 times [2020-08-21 20:20:14,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:14,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916152601] [2020-08-21 20:20:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,578 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:14,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 20:20:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 20:20:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 20:20:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:14,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916152601] [2020-08-21 20:20:14,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:14,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:20:14,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824820625] [2020-08-21 20:20:14,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:20:14,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:14,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:20:14,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:20:14,699 INFO L87 Difference]: Start difference. First operand 203 states and 230 transitions. Second operand 8 states. [2020-08-21 20:20:15,058 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:16,145 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:16,392 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:16,613 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:16,830 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:17,134 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:18,122 INFO L93 Difference]: Finished difference Result 607 states and 746 transitions. [2020-08-21 20:20:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:20:18,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-08-21 20:20:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:18,132 INFO L225 Difference]: With dead ends: 607 [2020-08-21 20:20:18,132 INFO L226 Difference]: Without dead ends: 428 [2020-08-21 20:20:18,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:20:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-08-21 20:20:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 361. [2020-08-21 20:20:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-21 20:20:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 410 transitions. [2020-08-21 20:20:18,214 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 410 transitions. Word has length 79 [2020-08-21 20:20:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:18,214 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 410 transitions. [2020-08-21 20:20:18,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:20:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 410 transitions. [2020-08-21 20:20:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 20:20:18,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:18,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:18,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:20:18,216 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1377771002, now seen corresponding path program 1 times [2020-08-21 20:20:18,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:18,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282109742] [2020-08-21 20:20:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,538 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:18,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 20:20:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 20:20:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:18,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282109742] [2020-08-21 20:20:18,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:18,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:20:18,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105771371] [2020-08-21 20:20:18,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:20:18,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:20:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:20:18,673 INFO L87 Difference]: Start difference. First operand 361 states and 410 transitions. Second operand 9 states. [2020-08-21 20:20:19,072 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:20,122 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:20,336 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:20,584 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:20,818 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:21,049 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:22,026 INFO L93 Difference]: Finished difference Result 470 states and 590 transitions. [2020-08-21 20:20:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:20:22,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-21 20:20:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:22,032 INFO L225 Difference]: With dead ends: 470 [2020-08-21 20:20:22,032 INFO L226 Difference]: Without dead ends: 467 [2020-08-21 20:20:22,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 20:20:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-08-21 20:20:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 361. [2020-08-21 20:20:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-21 20:20:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 409 transitions. [2020-08-21 20:20:22,105 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 409 transitions. Word has length 83 [2020-08-21 20:20:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:22,105 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 409 transitions. [2020-08-21 20:20:22,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:20:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 409 transitions. [2020-08-21 20:20:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:20:22,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:22,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:22,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:20:22,108 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash 453090503, now seen corresponding path program 1 times [2020-08-21 20:20:22,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:22,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162423696] [2020-08-21 20:20:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,363 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:22,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:20:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:20:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:22,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162423696] [2020-08-21 20:20:22,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:22,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:20:22,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170310354] [2020-08-21 20:20:22,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:20:22,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:20:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:20:22,472 INFO L87 Difference]: Start difference. First operand 361 states and 409 transitions. Second operand 9 states. [2020-08-21 20:20:23,385 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:23,618 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 20:20:23,854 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:24,075 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:25,011 INFO L93 Difference]: Finished difference Result 808 states and 990 transitions. [2020-08-21 20:20:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:20:25,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 20:20:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:25,015 INFO L225 Difference]: With dead ends: 808 [2020-08-21 20:20:25,016 INFO L226 Difference]: Without dead ends: 471 [2020-08-21 20:20:25,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:20:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-08-21 20:20:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 371. [2020-08-21 20:20:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-08-21 20:20:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 419 transitions. [2020-08-21 20:20:25,087 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 419 transitions. Word has length 84 [2020-08-21 20:20:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:25,087 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 419 transitions. [2020-08-21 20:20:25,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:20:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 419 transitions. [2020-08-21 20:20:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:20:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:25,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:25,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:20:25,090 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 475722757, now seen corresponding path program 1 times [2020-08-21 20:20:25,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:25,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354695841] [2020-08-21 20:20:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,360 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:20:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:20:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:25,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354695841] [2020-08-21 20:20:25,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:25,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 20:20:25,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516412948] [2020-08-21 20:20:25,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:20:25,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:20:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:20:25,491 INFO L87 Difference]: Start difference. First operand 371 states and 419 transitions. Second operand 11 states. [2020-08-21 20:20:26,142 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:26,365 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:26,592 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:27,209 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:27,442 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:27,676 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:28,796 INFO L93 Difference]: Finished difference Result 832 states and 1030 transitions. [2020-08-21 20:20:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:20:28,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 20:20:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:28,803 INFO L225 Difference]: With dead ends: 832 [2020-08-21 20:20:28,803 INFO L226 Difference]: Without dead ends: 485 [2020-08-21 20:20:28,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:20:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-21 20:20:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 379. [2020-08-21 20:20:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-08-21 20:20:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 427 transitions. [2020-08-21 20:20:28,858 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 427 transitions. Word has length 84 [2020-08-21 20:20:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:28,858 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 427 transitions. [2020-08-21 20:20:28,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:20:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 427 transitions. [2020-08-21 20:20:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:20:28,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:28,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:28,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:20:28,861 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1501214756, now seen corresponding path program 1 times [2020-08-21 20:20:28,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:28,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002816544] [2020-08-21 20:20:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,127 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:29,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:20:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:20:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:29,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002816544] [2020-08-21 20:20:29,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:29,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 20:20:29,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830837513] [2020-08-21 20:20:29,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:20:29,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:20:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:20:29,244 INFO L87 Difference]: Start difference. First operand 379 states and 427 transitions. Second operand 7 states. [2020-08-21 20:20:29,717 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:30,301 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:20:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:32,326 INFO L93 Difference]: Finished difference Result 1174 states and 1504 transitions. [2020-08-21 20:20:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:20:32,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-08-21 20:20:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:32,331 INFO L225 Difference]: With dead ends: 1174 [2020-08-21 20:20:32,332 INFO L226 Difference]: Without dead ends: 819 [2020-08-21 20:20:32,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:20:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-08-21 20:20:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 699. [2020-08-21 20:20:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-08-21 20:20:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 821 transitions. [2020-08-21 20:20:32,461 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 821 transitions. Word has length 84 [2020-08-21 20:20:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:32,462 INFO L479 AbstractCegarLoop]: Abstraction has 699 states and 821 transitions. [2020-08-21 20:20:32,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:20:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 821 transitions. [2020-08-21 20:20:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 20:20:32,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:32,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:32,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:20:32,464 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1300385726, now seen corresponding path program 1 times [2020-08-21 20:20:32,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:32,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599295383] [2020-08-21 20:20:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:20:32,516 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:20:32,516 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:20:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:20:32,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:20:32 BoogieIcfgContainer [2020-08-21 20:20:32,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:20:32,548 INFO L168 Benchmark]: Toolchain (without parser) took 29299.35 ms. Allocated memory was 141.0 MB in the beginning and 618.1 MB in the end (delta: 477.1 MB). Free memory was 103.2 MB in the beginning and 552.9 MB in the end (delta: -449.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:32,549 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 20:20:32,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.50 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.0 MB in the beginning and 174.4 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:32,550 INFO L168 Benchmark]: Boogie Preprocessor took 104.99 ms. Allocated memory is still 204.5 MB. Free memory was 174.4 MB in the beginning and 170.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:32,551 INFO L168 Benchmark]: RCFGBuilder took 1254.38 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 169.4 MB in the beginning and 194.6 MB in the end (delta: -25.2 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:32,552 INFO L168 Benchmark]: TraceAbstraction took 27292.77 ms. Allocated memory was 234.9 MB in the beginning and 618.1 MB in the end (delta: 383.3 MB). Free memory was 194.6 MB in the beginning and 552.9 MB in the end (delta: -358.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:32,555 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 642.50 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.0 MB in the beginning and 174.4 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.99 ms. Allocated memory is still 204.5 MB. Free memory was 174.4 MB in the beginning and 170.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1254.38 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 169.4 MB in the beginning and 194.6 MB in the end (delta: -25.2 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27292.77 ms. Allocated memory was 234.9 MB in the beginning and 618.1 MB in the end (delta: 383.3 MB). Free memory was 194.6 MB in the beginning and 552.9 MB in the end (delta: -358.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 388]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L76] int waterLevel = 1; [L77] int methaneLevelCritical = 0; [L179] int cleanupTimeShifts = 4; [L395] int pumpRunning = 0; [L396] int systemActive = 1; [L769] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L258] int retValue_acc ; [L259] int tmp ; [L263] FCALL select_helpers() [L264] FCALL select_features() [L265] CALL, EXPR valid_product() [L307] int retValue_acc ; [L310] retValue_acc = 1 [L311] return (retValue_acc); [L265] RET, EXPR valid_product() [L265] tmp = valid_product() [L267] COND TRUE \read(tmp) [L269] FCALL setup() [L270] CALL runTest() [L249] CALL test() [L318] int splverifierCounter ; [L319] int tmp ; [L320] int tmp___0 ; [L321] int tmp___1 ; [L322] int tmp___2 ; [L325] splverifierCounter = 0 [L327] COND TRUE 1 [L329] COND TRUE splverifierCounter < 4 [L335] tmp = __VERIFIER_nondet_int() [L337] COND TRUE \read(tmp) [L339] CALL waterRise() [L94] COND TRUE waterLevel < 2 [L95] waterLevel = waterLevel + 1 [L339] RET waterRise() [L345] tmp___0 = __VERIFIER_nondet_int() [L347] COND TRUE \read(tmp___0) [L349] CALL changeMethaneLevel() [L106] COND FALSE !(\read(methaneLevelCritical)) [L109] methaneLevelCritical = 1 [L349] RET changeMethaneLevel() [L355] tmp___2 = __VERIFIER_nondet_int() [L357] COND FALSE !(\read(tmp___2)) [L363] tmp___1 = __VERIFIER_nondet_int() [L365] COND TRUE \read(tmp___1) [L372] CALL timeShift() [L402] COND FALSE !(\read(pumpRunning)) [L409] COND TRUE \read(systemActive) [L411] CALL processEnvironment() [L457] int tmp ; [L460] COND FALSE !(\read(pumpRunning)) [L475] CALL processEnvironment__wrappee__highWaterSensor() [L431] int tmp ; [L434] COND TRUE ! pumpRunning [L436] CALL, EXPR isHighWaterLevel() [L554] int retValue_acc ; [L555] int tmp ; [L556] int tmp___0 ; [L560] CALL, EXPR isHighWaterSensorDry() [L156] int retValue_acc ; [L159] COND FALSE !(waterLevel < 2) [L163] retValue_acc = 0 [L164] return (retValue_acc); [L560] RET, EXPR isHighWaterSensorDry() [L560] tmp = isHighWaterSensorDry() [L562] COND FALSE !(\read(tmp)) [L565] tmp___0 = 1 [L567] retValue_acc = tmp___0 [L568] return (retValue_acc); [L436] RET, EXPR isHighWaterLevel() [L436] tmp = isHighWaterLevel() [L438] COND TRUE \read(tmp) [L440] CALL activatePump() [L485] pumpRunning = 1 [L440] RET activatePump() [L475] RET processEnvironment__wrappee__highWaterSensor() [L411] RET processEnvironment() [L417] CALL __utac_acc__Specification1_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR isMethaneLevelCritical() [L115] int retValue_acc ; [L118] retValue_acc = methaneLevelCritical [L119] return (retValue_acc); [L49] RET, EXPR isMethaneLevelCritical() [L49] tmp = isMethaneLevelCritical() [L51] COND TRUE \read(tmp) [L53] CALL, EXPR isPumpRunning() [L509] int retValue_acc ; [L512] retValue_acc = pumpRunning [L513] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L388] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 239 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.2s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 22.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1086 SDtfs, 1822 SDslu, 983 SDs, 0 SdLazy, 5120 SolverSat, 1182 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 222 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=699occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 627 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 712 NumberOfCodeBlocks, 712 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 615 ConstructedInterpolants, 0 QuantifiedInterpolants, 190976 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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...