/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:21:37,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:21:37,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:21:37,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:21:37,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:21:37,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:21:37,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:21:37,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:21:37,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:21:37,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:21:37,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:21:37,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:21:37,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:21:37,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:21:37,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:21:37,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:21:37,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:21:37,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:21:37,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:21:37,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:21:37,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:21:37,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:21:37,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:21:37,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:21:37,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:21:37,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:21:37,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:21:37,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:21:37,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:21:37,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:21:37,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:21:37,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:21:37,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:21:37,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:21:37,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:21:37,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:21:37,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:21:37,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:21:37,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:21:37,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:21:37,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:21:37,971 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 23:21:38,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:21:38,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:21:38,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:21:38,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:21:38,007 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:21:38,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:21:38,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:21:38,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:21:38,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:21:38,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:21:38,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:21:38,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:21:38,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:21:38,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:21:38,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:21:38,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:21:38,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:21:38,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:21:38,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:21:38,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:21:38,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:21:38,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:21:38,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:21:38,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:21:38,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:21:38,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:21:38,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:21:38,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:21:38,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:21:38,016 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=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:21:38,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:21:38,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:21:38,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:21:38,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:21:38,301 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:21:38,302 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product25.cil.c [2020-08-18 23:21:38,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14c39337/2471c630fac6470392d7b9c02f36bd4a/FLAG3ded07c86 [2020-08-18 23:21:38,918 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:21:38,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product25.cil.c [2020-08-18 23:21:38,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14c39337/2471c630fac6470392d7b9c02f36bd4a/FLAG3ded07c86 [2020-08-18 23:21:39,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14c39337/2471c630fac6470392d7b9c02f36bd4a [2020-08-18 23:21:39,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:21:39,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:21:39,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:21:39,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:21:39,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:21:39,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf7d031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39, skipping insertion in model container [2020-08-18 23:21:39,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:21:39,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:21:39,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:21:39,733 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:21:39,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:21:39,860 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:21:39,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39 WrapperNode [2020-08-18 23:21:39,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:21:39,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:21:39,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:21:39,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:21:39,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (1/1) ... [2020-08-18 23:21:39,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:21:39,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:21:39,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:21:39,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:21:39,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (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 23:21:40,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:21:40,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:21:40,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 23:21:40,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 23:21:40,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 23:21:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 23:21:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 23:21:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 23:21:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 23:21:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 23:21:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 23:21:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 23:21:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 23:21:40,030 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 23:21:40,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 23:21:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 23:21:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 23:21:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 23:21:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 23:21:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 23:21:40,032 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 23:21:40,032 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 23:21:40,032 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 23:21:40,034 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 23:21:40,035 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 23:21:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 23:21:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:21:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 23:21:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 23:21:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 23:21:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 23:21:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 23:21:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 23:21:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 23:21:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 23:21:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 23:21:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 23:21:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 23:21:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:21:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:21:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 23:21:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 23:21:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 23:21:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 23:21:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 23:21:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 23:21:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 23:21:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:21:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 23:21:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 23:21:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:21:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 23:21:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 23:21:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:21:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 23:21:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 23:21:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:21:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 23:21:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 23:21:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 23:21:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 23:21:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 23:21:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 23:21:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 23:21:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 23:21:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 23:21:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 23:21:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 23:21:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 23:21:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 23:21:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 23:21:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:21:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 23:21:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:21:41,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:21:41,189 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 23:21:41,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:41 BoogieIcfgContainer [2020-08-18 23:21:41,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:21:41,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:21:41,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:21:41,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:21:41,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:21:39" (1/3) ... [2020-08-18 23:21:41,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28985e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:41, skipping insertion in model container [2020-08-18 23:21:41,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:39" (2/3) ... [2020-08-18 23:21:41,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28985e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:41, skipping insertion in model container [2020-08-18 23:21:41,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:41" (3/3) ... [2020-08-18 23:21:41,204 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product25.cil.c [2020-08-18 23:21:41,215 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:21:41,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:21:41,238 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:21:41,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:21:41,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:21:41,264 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:21:41,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:21:41,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:21:41,265 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:21:41,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:21:41,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:21:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-08-18 23:21:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 23:21:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:41,297 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 23:21:41,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash -950316372, now seen corresponding path program 1 times [2020-08-18 23:21:41,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:41,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539806358] [2020-08-18 23:21:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,004 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:21:42,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:21:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:21:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:21:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:21:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:21:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 23:21:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 23:21:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 23:21:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:42,132 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 23:21:42,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539806358] [2020-08-18 23:21:42,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:21:42,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:21:42,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078379537] [2020-08-18 23:21:42,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:21:42,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:21:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:21:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:21:42,163 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 3 states. [2020-08-18 23:21:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:21:43,237 INFO L93 Difference]: Finished difference Result 259 states and 341 transitions. [2020-08-18 23:21:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:21:43,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 23:21:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:21:43,259 INFO L225 Difference]: With dead ends: 259 [2020-08-18 23:21:43,260 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 23:21:43,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:21:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 23:21:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-08-18 23:21:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-18 23:21:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-08-18 23:21:43,384 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 52 [2020-08-18 23:21:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:21:43,384 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-08-18 23:21:43,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:21:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-08-18 23:21:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 23:21:43,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:43,389 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 23:21:43,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:21:43,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:43,390 INFO L82 PathProgramCache]: Analyzing trace with hash 878728997, now seen corresponding path program 1 times [2020-08-18 23:21:43,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:43,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416355025] [2020-08-18 23:21:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,720 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:21:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:21:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:21:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:21:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:21:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:21:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:21:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:21:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:21:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:43,808 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 23:21:43,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416355025] [2020-08-18 23:21:43,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:21:43,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:21:43,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697769693] [2020-08-18 23:21:43,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:21:43,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:21:43,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:21:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:21:43,814 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 4 states. [2020-08-18 23:21:44,244 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:21:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:21:44,916 INFO L93 Difference]: Finished difference Result 192 states and 232 transitions. [2020-08-18 23:21:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:21:44,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 23:21:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:21:44,920 INFO L225 Difference]: With dead ends: 192 [2020-08-18 23:21:44,921 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 23:21:44,923 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 23:21:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 23:21:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-08-18 23:21:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 23:21:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-08-18 23:21:44,965 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 53 [2020-08-18 23:21:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:21:44,966 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-08-18 23:21:44,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:21:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-08-18 23:21:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 23:21:44,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:44,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:21:44,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:21:44,969 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1316004347, now seen corresponding path program 1 times [2020-08-18 23:21:44,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:44,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239380571] [2020-08-18 23:21:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,308 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:21:45,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:21:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:21:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:21:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:21:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:21:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:21:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:21:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:21:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:45,429 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 23:21:45,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239380571] [2020-08-18 23:21:45,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:21:45,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:21:45,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258087160] [2020-08-18 23:21:45,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:21:45,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:21:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:21:45,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:21:45,432 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 8 states. [2020-08-18 23:21:45,792 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:21:46,075 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:46,316 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:46,567 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:21:47,511 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2020-08-18 23:21:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:21:47,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 23:21:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:21:47,514 INFO L225 Difference]: With dead ends: 201 [2020-08-18 23:21:47,514 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 23:21:47,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:21:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 23:21:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-08-18 23:21:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 23:21:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-08-18 23:21:47,546 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 57 [2020-08-18 23:21:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:21:47,547 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-08-18 23:21:47,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:21:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-08-18 23:21:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 23:21:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:47,549 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] [2020-08-18 23:21:47,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:21:47,550 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -402432006, now seen corresponding path program 1 times [2020-08-18 23:21:47,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:47,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943940745] [2020-08-18 23:21:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,830 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:21:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:21:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:21:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:21:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:21:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:21:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:21:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:21:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:21:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 23:21:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 23:21:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:47,952 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 23:21:47,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943940745] [2020-08-18 23:21:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:21:47,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:21:47,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830233989] [2020-08-18 23:21:47,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:21:47,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:21:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:21:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:21:47,955 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 8 states. [2020-08-18 23:21:48,297 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:21:49,493 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:49,817 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:50,079 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:21:50,320 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:21:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:21:50,880 INFO L93 Difference]: Finished difference Result 299 states and 390 transitions. [2020-08-18 23:21:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:21:50,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-08-18 23:21:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:21:50,887 INFO L225 Difference]: With dead ends: 299 [2020-08-18 23:21:50,887 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 23:21:50,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:21:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 23:21:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 176. [2020-08-18 23:21:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-18 23:21:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-08-18 23:21:50,948 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 65 [2020-08-18 23:21:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:21:50,948 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-08-18 23:21:50,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:21:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-08-18 23:21:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 23:21:50,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:50,951 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] [2020-08-18 23:21:50,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:21:50,952 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -643922522, now seen corresponding path program 1 times [2020-08-18 23:21:50,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:50,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919357861] [2020-08-18 23:21:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,237 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:21:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:21:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:21:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:21:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:21:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:21:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:21:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 23:21:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:21:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:21:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 23:21:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 23:21:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 23:21:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:21:51,333 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 23:21:51,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919357861] [2020-08-18 23:21:51,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:21:51,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:21:51,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072764069] [2020-08-18 23:21:51,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:21:51,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:21:51,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:21:51,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:21:51,340 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-08-18 23:21:51,638 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:21:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:21:52,122 INFO L93 Difference]: Finished difference Result 289 states and 355 transitions. [2020-08-18 23:21:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:21:52,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-08-18 23:21:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:21:52,124 INFO L225 Difference]: With dead ends: 289 [2020-08-18 23:21:52,125 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 23:21:52,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:21:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 23:21:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2020-08-18 23:21:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 23:21:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2020-08-18 23:21:52,154 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 73 [2020-08-18 23:21:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:21:52,155 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2020-08-18 23:21:52,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:21:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2020-08-18 23:21:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 23:21:52,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:21:52,156 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] [2020-08-18 23:21:52,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:21:52,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:21:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:21:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1866072192, now seen corresponding path program 1 times [2020-08-18 23:21:52,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:21:52,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729522344] [2020-08-18 23:21:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:21:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:21:52,216 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:21:52,216 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:21:52,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:21:52,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:21:52 BoogieIcfgContainer [2020-08-18 23:21:52,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:21:52,245 INFO L168 Benchmark]: Toolchain (without parser) took 13098.44 ms. Allocated memory was 140.0 MB in the beginning and 418.4 MB in the end (delta: 278.4 MB). Free memory was 102.5 MB in the beginning and 99.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 281.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:21:52,246 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:21:52,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.57 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.3 MB in the beginning and 169.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:21:52,248 INFO L168 Benchmark]: Boogie Preprocessor took 97.22 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 165.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:21:52,249 INFO L168 Benchmark]: RCFGBuilder took 1235.68 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 165.3 MB in the beginning and 194.5 MB in the end (delta: -29.2 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:21:52,250 INFO L168 Benchmark]: TraceAbstraction took 11046.66 ms. Allocated memory was 236.5 MB in the beginning and 418.4 MB in the end (delta: 181.9 MB). Free memory was 194.5 MB in the beginning and 99.1 MB in the end (delta: 95.4 MB). Peak memory consumption was 277.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:21:52,253 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 712.57 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.3 MB in the beginning and 169.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.22 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 165.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1235.68 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 165.3 MB in the beginning and 194.5 MB in the end (delta: -29.2 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11046.66 ms. Allocated memory was 236.5 MB in the beginning and 418.4 MB in the end (delta: 181.9 MB). Free memory was 194.5 MB in the beginning and 99.1 MB in the end (delta: 95.4 MB). Peak memory consumption was 277.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 82]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L256] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L458] int waterLevel = 1; [L459] int methaneLevelCritical = 0; [L585] int cleanupTimeShifts = 4; [L686] int pumpRunning = 0; [L687] int systemActive = 1; [L661] int retValue_acc ; [L662] int tmp ; [L666] FCALL select_helpers() [L667] FCALL select_features() [L668] CALL, EXPR valid_product() [L576] int retValue_acc ; [L579] retValue_acc = 1 [L580] return (retValue_acc); [L668] RET, EXPR valid_product() [L668] tmp = valid_product() [L670] COND TRUE \read(tmp) [L672] FCALL setup() [L673] CALL runTest() [L655] CALL test() [L857] int splverifierCounter ; [L858] int tmp ; [L859] int tmp___0 ; [L860] int tmp___1 ; [L861] int tmp___2 ; [L864] splverifierCounter = 0 [L866] COND TRUE 1 [L868] COND TRUE splverifierCounter < 4 [L874] tmp = __VERIFIER_nondet_int() [L876] COND TRUE \read(tmp) [L878] CALL waterRise() [L476] COND TRUE waterLevel < 2 [L477] waterLevel = waterLevel + 1 [L878] RET waterRise() [L884] tmp___0 = __VERIFIER_nondet_int() [L886] COND FALSE !(\read(tmp___0)) [L894] tmp___2 = __VERIFIER_nondet_int() [L896] COND TRUE \read(tmp___2) [L909] CALL timeShift() [L693] COND FALSE !(\read(pumpRunning)) [L700] COND TRUE \read(systemActive) [L702] CALL processEnvironment() [L722] int tmp ; [L725] COND FALSE !(\read(pumpRunning)) [L740] FCALL processEnvironment__wrappee__base() [L702] RET processEnvironment() [L708] CALL __utac_acc__Specification3_spec__1() [L45] int tmp ; [L46] int tmp___0 ; [L47] int tmp___1 ; [L51] CALL, EXPR isMethaneLevelCritical() [L497] int retValue_acc ; [L500] retValue_acc = methaneLevelCritical [L501] return (retValue_acc); [L51] RET, EXPR isMethaneLevelCritical() [L51] tmp = isMethaneLevelCritical() [L53] COND FALSE !(\read(tmp)) [L57] CALL, EXPR getWaterLevel() [L529] int retValue_acc ; [L532] retValue_acc = waterLevel [L533] return (retValue_acc); [L57] RET, EXPR getWaterLevel() [L57] tmp___0 = getWaterLevel() [L59] COND TRUE tmp___0 == 2 [L61] CALL, EXPR isPumpRunning() [L792] int retValue_acc ; [L795] retValue_acc = pumpRunning [L796] return (retValue_acc); [L61] RET, EXPR isPumpRunning() [L61] tmp___1 = isPumpRunning() [L63] COND FALSE !(\read(tmp___1)) [L67] CALL __automaton_fail() [L82] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 224 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.9s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 444 SDtfs, 622 SDslu, 243 SDs, 0 SdLazy, 1325 SolverSat, 355 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred 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, 134 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 295 ConstructedInterpolants, 0 QuantifiedInterpolants, 84162 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...