/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:58:28,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:58:28,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:58:28,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:58:28,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:58:28,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:58:28,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:58:28,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:58:28,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:58:28,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:58:28,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:58:28,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:58:28,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:58:28,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:58:28,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:58:28,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:58:28,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:58:28,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:58:28,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:58:28,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:58:28,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:58:28,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:58:28,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:58:28,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:58:28,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:58:28,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:58:28,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:58:28,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:58:28,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:58:28,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:58:28,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:58:28,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:58:28,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:58:28,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:58:28,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:58:28,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:58:28,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:58:28,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:58:28,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:58:28,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:58:28,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:58:28,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:58:28,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:58:28,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:58:28,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:58:28,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:58:28,992 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:58:28,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:58:28,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:58:28,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:58:28,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:58:28,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:58:28,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:58:28,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:58:28,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:58:28,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:58:28,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:58:28,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:58:28,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:58:28,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:58:28,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:58:28,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:58:28,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:58:28,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:58:28,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:58:28,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:58:28,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:58:28,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:58:28,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:58:28,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:58:28,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:58:28,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:58:29,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:58:29,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:58:29,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:58:29,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:58:29,308 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:58:29,308 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c [2020-08-18 11:58:29,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/313976a9e/fabc6bbbbf284b0c9bb721b3831dc94d/FLAGd5d71637a [2020-08-18 11:58:29,838 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:58:29,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c [2020-08-18 11:58:29,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/313976a9e/fabc6bbbbf284b0c9bb721b3831dc94d/FLAGd5d71637a [2020-08-18 11:58:30,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/313976a9e/fabc6bbbbf284b0c9bb721b3831dc94d [2020-08-18 11:58:30,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:58:30,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:58:30,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:58:30,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:58:30,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:58:30,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e52fa5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30, skipping insertion in model container [2020-08-18 11:58:30,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:58:30,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:58:30,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:58:30,539 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:58:30,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:58:30,737 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:58:30,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30 WrapperNode [2020-08-18 11:58:30,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:58:30,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:58:30,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:58:30,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:58:30,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... [2020-08-18 11:58:30,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:58:30,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:58:30,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:58:30,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:58:30,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:58:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:58:30,891 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:58:30,892 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 11:58:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:58:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:58:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:58:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:58:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:58:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:58:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:58:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:58:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:58:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:58:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:58:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:58:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:58:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:58:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:58:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:58:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:58:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:58:31,922 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:58:31,922 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:58:31,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:58:31 BoogieIcfgContainer [2020-08-18 11:58:31,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:58:31,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:58:31,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:58:31,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:58:31,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:58:30" (1/3) ... [2020-08-18 11:58:31,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cab8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:58:31, skipping insertion in model container [2020-08-18 11:58:31,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:58:30" (2/3) ... [2020-08-18 11:58:31,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cab8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:58:31, skipping insertion in model container [2020-08-18 11:58:31,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:58:31" (3/3) ... [2020-08-18 11:58:31,941 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product26.cil.c [2020-08-18 11:58:31,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:58:31,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:58:31,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:58:31,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:58:31,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:58:31,994 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:58:31,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:58:31,994 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:58:31,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:58:31,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:58:31,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:58:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-08-18 11:58:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 11:58:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:32,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:58:32,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1563256651, now seen corresponding path program 1 times [2020-08-18 11:58:32,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:32,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467579422] [2020-08-18 11:58:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,684 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:58:32,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:58:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:58:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:58:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:58:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:58:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:58:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:58:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 11:58:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:58:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467579422] [2020-08-18 11:58:32,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:58:32,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:58:32,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969663638] [2020-08-18 11:58:32,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:58:32,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:58:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:58:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:58:32,790 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 3 states. [2020-08-18 11:58:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:58:33,806 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2020-08-18 11:58:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:58:33,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 11:58:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:58:33,822 INFO L225 Difference]: With dead ends: 268 [2020-08-18 11:58:33,822 INFO L226 Difference]: Without dead ends: 145 [2020-08-18 11:58:33,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:58:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-18 11:58:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2020-08-18 11:58:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 11:58:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-08-18 11:58:33,904 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 52 [2020-08-18 11:58:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:58:33,905 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-08-18 11:58:33,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:58:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-08-18 11:58:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 11:58:33,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:33,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:58:33,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:58:33,910 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 129011283, now seen corresponding path program 1 times [2020-08-18 11:58:33,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:33,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710285061] [2020-08-18 11:58:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,238 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:58:34,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:58:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:58:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:58:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:58:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:58:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:58:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:58:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 11:58:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:58:34,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710285061] [2020-08-18 11:58:34,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:58:34,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:58:34,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165776681] [2020-08-18 11:58:34,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:58:34,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:58:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:58:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:58:34,287 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 4 states. [2020-08-18 11:58:34,741 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:58:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:58:35,389 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2020-08-18 11:58:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:58:35,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 11:58:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:58:35,393 INFO L225 Difference]: With dead ends: 197 [2020-08-18 11:58:35,393 INFO L226 Difference]: Without dead ends: 129 [2020-08-18 11:58:35,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:58:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-18 11:58:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2020-08-18 11:58:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 11:58:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-08-18 11:58:35,430 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 53 [2020-08-18 11:58:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:58:35,430 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-08-18 11:58:35,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:58:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-08-18 11:58:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 11:58:35,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:35,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:58:35,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:58:35,433 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1511338084, now seen corresponding path program 1 times [2020-08-18 11:58:35,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:35,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193990564] [2020-08-18 11:58:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,774 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:58:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:58:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:58:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:58:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:58:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:58:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:58:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 11:58:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 11:58:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:58:35,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193990564] [2020-08-18 11:58:35,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:58:35,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:58:35,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103776186] [2020-08-18 11:58:35,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:58:35,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:58:35,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:58:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:58:35,870 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 8 states. [2020-08-18 11:58:36,301 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:58:36,623 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:36,890 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:37,171 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:58:38,221 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2020-08-18 11:58:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:58:38,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-18 11:58:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:58:38,232 INFO L225 Difference]: With dead ends: 210 [2020-08-18 11:58:38,232 INFO L226 Difference]: Without dead ends: 129 [2020-08-18 11:58:38,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:58:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-18 11:58:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2020-08-18 11:58:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 11:58:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-08-18 11:58:38,263 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58 [2020-08-18 11:58:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:58:38,263 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-08-18 11:58:38,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:58:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-08-18 11:58:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:58:38,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:38,266 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] [2020-08-18 11:58:38,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:58:38,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1273380087, now seen corresponding path program 1 times [2020-08-18 11:58:38,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:38,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276156461] [2020-08-18 11:58:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,610 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:58:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:58:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:58:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:58:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:58:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:58:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 11:58:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:58:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 11:58:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 11:58:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:58:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:58:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276156461] [2020-08-18 11:58:38,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:58:38,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:58:38,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208560893] [2020-08-18 11:58:38,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:58:38,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:58:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:58:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:58:38,747 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 8 states. [2020-08-18 11:58:39,128 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:58:40,372 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:40,703 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:41,010 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:58:41,246 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:58:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:58:41,843 INFO L93 Difference]: Finished difference Result 314 states and 408 transitions. [2020-08-18 11:58:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:58:41,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 11:58:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:58:41,848 INFO L225 Difference]: With dead ends: 314 [2020-08-18 11:58:41,848 INFO L226 Difference]: Without dead ends: 233 [2020-08-18 11:58:41,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:58:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-08-18 11:58:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 184. [2020-08-18 11:58:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 11:58:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-08-18 11:58:41,895 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 66 [2020-08-18 11:58:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:58:41,896 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-08-18 11:58:41,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:58:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-08-18 11:58:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:58:41,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:41,899 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] [2020-08-18 11:58:41,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:58:41,899 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1502182801, now seen corresponding path program 1 times [2020-08-18 11:58:41,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:41,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680783185] [2020-08-18 11:58:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,184 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:58:42,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:58:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:58:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:58:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:58:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:58:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 11:58:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:58:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:58:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 11:58:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 11:58:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 11:58:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:58:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:58:42,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680783185] [2020-08-18 11:58:42,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:58:42,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:58:42,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449068324] [2020-08-18 11:58:42,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:58:42,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:58:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:58:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:58:42,336 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 6 states. [2020-08-18 11:58:42,671 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:58:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:58:43,262 INFO L93 Difference]: Finished difference Result 306 states and 373 transitions. [2020-08-18 11:58:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:58:43,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-08-18 11:58:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:58:43,265 INFO L225 Difference]: With dead ends: 306 [2020-08-18 11:58:43,265 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 11:58:43,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:58:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 11:58:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2020-08-18 11:58:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-18 11:58:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2020-08-18 11:58:43,296 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 70 [2020-08-18 11:58:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:58:43,297 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2020-08-18 11:58:43,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:58:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2020-08-18 11:58:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:58:43,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:58:43,298 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] [2020-08-18 11:58:43,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:58:43,298 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:58:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:58:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1264318339, now seen corresponding path program 1 times [2020-08-18 11:58:43,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:58:43,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332139911] [2020-08-18 11:58:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:58:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:58:43,353 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:58:43,353 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:58:43,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:58:43,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:58:43 BoogieIcfgContainer [2020-08-18 11:58:43,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:58:43,380 INFO L168 Benchmark]: Toolchain (without parser) took 13260.04 ms. Allocated memory was 138.4 MB in the beginning and 419.4 MB in the end (delta: 281.0 MB). Free memory was 100.9 MB in the beginning and 159.2 MB in the end (delta: -58.4 MB). Peak memory consumption was 222.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,381 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 617.86 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 172.8 MB in the end (delta: -72.2 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,382 INFO L168 Benchmark]: Boogie Preprocessor took 91.11 ms. Allocated memory is still 202.4 MB. Free memory was 172.8 MB in the beginning and 168.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,383 INFO L168 Benchmark]: RCFGBuilder took 1100.72 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 168.2 MB in the beginning and 199.6 MB in the end (delta: -31.4 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,384 INFO L168 Benchmark]: TraceAbstraction took 11443.89 ms. Allocated memory was 233.3 MB in the beginning and 419.4 MB in the end (delta: 186.1 MB). Free memory was 198.1 MB in the beginning and 159.2 MB in the end (delta: 38.9 MB). Peak memory consumption was 225.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:58:43,388 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 617.86 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.7 MB in the beginning and 172.8 MB in the end (delta: -72.2 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.11 ms. Allocated memory is still 202.4 MB. Free memory was 172.8 MB in the beginning and 168.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1100.72 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 168.2 MB in the beginning and 199.6 MB in the end (delta: -31.4 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11443.89 ms. Allocated memory was 233.3 MB in the beginning and 419.4 MB in the end (delta: 186.1 MB). Free memory was 198.1 MB in the beginning and 159.2 MB in the end (delta: 38.9 MB). Peak memory consumption was 225.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 643]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L40] int cleanupTimeShifts = 4; [L184] int waterLevel = 1; [L185] int methaneLevelCritical = 0; [L442] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L652] int pumpRunning = 0; [L653] int systemActive = 1; [L121] int retValue_acc ; [L122] int tmp ; [L126] FCALL select_helpers() [L127] FCALL select_features() [L128] CALL, EXPR valid_product() [L170] int retValue_acc ; [L173] retValue_acc = 1 [L174] return (retValue_acc); [L128] RET, EXPR valid_product() [L128] tmp = valid_product() [L130] COND TRUE \read(tmp) [L132] FCALL setup() [L133] CALL runTest() [L112] CALL test() [L832] int splverifierCounter ; [L833] int tmp ; [L834] int tmp___0 ; [L835] int tmp___1 ; [L836] int tmp___2 ; [L839] splverifierCounter = 0 [L841] COND TRUE 1 [L843] COND TRUE splverifierCounter < 4 [L849] tmp = __VERIFIER_nondet_int() [L851] COND TRUE \read(tmp) [L853] CALL waterRise() [L202] COND TRUE waterLevel < 2 [L203] waterLevel = waterLevel + 1 [L853] RET waterRise() [L859] tmp___0 = __VERIFIER_nondet_int() [L861] COND FALSE !(\read(tmp___0)) [L869] tmp___2 = __VERIFIER_nondet_int() [L871] COND FALSE !(\read(tmp___2)) [L877] tmp___1 = __VERIFIER_nondet_int() [L879] COND TRUE \read(tmp___1) [L886] CALL timeShift() [L660] COND FALSE !(\read(pumpRunning)) [L667] COND TRUE \read(systemActive) [L669] CALL processEnvironment() [L689] int tmp ; [L692] COND FALSE !(\read(pumpRunning)) [L707] FCALL processEnvironment__wrappee__base() [L669] RET processEnvironment() [L675] CALL __utac_acc__Specification3_spec__1() [L899] int tmp ; [L900] int tmp___0 ; [L901] int tmp___1 ; [L905] CALL, EXPR isMethaneLevelCritical() [L223] int retValue_acc ; [L226] retValue_acc = methaneLevelCritical [L227] return (retValue_acc); [L905] RET, EXPR isMethaneLevelCritical() [L905] tmp = isMethaneLevelCritical() [L907] COND FALSE !(\read(tmp)) [L911] CALL, EXPR getWaterLevel() [L255] int retValue_acc ; [L258] retValue_acc = waterLevel [L259] return (retValue_acc); [L911] RET, EXPR getWaterLevel() [L911] tmp___0 = getWaterLevel() [L913] COND TRUE tmp___0 == 2 [L915] CALL, EXPR isPumpRunning() [L759] int retValue_acc ; [L762] retValue_acc = pumpRunning [L763] return (retValue_acc); [L915] RET, EXPR isPumpRunning() [L915] tmp___1 = isPumpRunning() [L917] COND FALSE !(\read(tmp___1)) [L921] CALL __automaton_fail() [L643] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 228 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 462 SDtfs, 744 SDslu, 260 SDs, 0 SdLazy, 1384 SolverSat, 488 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 141 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 83938 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...