/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:43:18,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:43:18,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:43:18,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:43:18,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:43:18,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:43:18,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:43:18,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:43:18,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:43:18,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:43:18,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:43:18,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:43:18,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:43:18,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:43:18,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:43:18,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:43:18,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:43:18,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:43:18,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:43:18,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:43:18,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:43:18,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:43:18,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:43:18,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:43:18,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:43:18,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:43:18,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:43:18,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:43:18,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:43:18,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:43:18,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:43:18,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:43:18,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:43:18,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:43:18,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:43:18,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:43:18,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:43:18,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:43:18,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:43:18,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:43:18,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:43:18,581 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 17:43:18,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:43:18,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:43:18,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:43:18,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:43:18,632 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:43:18,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:43:18,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:43:18,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:43:18,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:43:18,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:43:18,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:43:18,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:43:18,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:43:18,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:43:18,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:43:18,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:43:18,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:43:18,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:43:18,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:43:18,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:43:18,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:43:18,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:43:18,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:43:18,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:43:18,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:43:18,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:43:18,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:43:18,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:43:18,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:43:18,639 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:43:18,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:43:18,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:43:18,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:43:18,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:43:18,972 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:43:18,972 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product30.cil.c [2020-08-18 17:43:19,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d35560f7a/d0e65ab4b84144a894e522ac07ef786e/FLAGb64e4533e [2020-08-18 17:43:19,573 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:43:19,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product30.cil.c [2020-08-18 17:43:19,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d35560f7a/d0e65ab4b84144a894e522ac07ef786e/FLAGb64e4533e [2020-08-18 17:43:19,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d35560f7a/d0e65ab4b84144a894e522ac07ef786e [2020-08-18 17:43:19,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:43:19,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:43:19,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:43:19,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:43:19,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:43:19,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:43:19" (1/1) ... [2020-08-18 17:43:19,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:19, skipping insertion in model container [2020-08-18 17:43:19,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:43:19" (1/1) ... [2020-08-18 17:43:19,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:43:19,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:43:20,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:43:20,269 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:43:20,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:43:20,495 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:43:20,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20 WrapperNode [2020-08-18 17:43:20,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:43:20,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:43:20,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:43:20,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:43:20,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (1/1) ... [2020-08-18 17:43:20,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:43:20,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:43:20,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:43:20,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:43:20,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (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 17:43:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:43:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 17:43:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 17:43:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 17:43:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 17:43:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 17:43:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 17:43:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 17:43:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 17:43:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 17:43:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 17:43:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 17:43:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 17:43:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 17:43:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:43:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 17:43:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:43:20,661 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 17:43:20,661 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 17:43:20,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:43:20,661 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 17:43:20,661 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 17:43:20,662 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 17:43:20,663 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 17:43:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 17:43:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:43:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 17:43:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:43:21,679 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:43:21,679 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 17:43:21,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:43:21 BoogieIcfgContainer [2020-08-18 17:43:21,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:43:21,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:43:21,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:43:21,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:43:21,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:43:19" (1/3) ... [2020-08-18 17:43:21,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdbb813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:43:21, skipping insertion in model container [2020-08-18 17:43:21,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:43:20" (2/3) ... [2020-08-18 17:43:21,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdbb813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:43:21, skipping insertion in model container [2020-08-18 17:43:21,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:43:21" (3/3) ... [2020-08-18 17:43:21,693 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product30.cil.c [2020-08-18 17:43:21,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:43:21,712 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:43:21,727 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:43:21,748 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:43:21,748 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:43:21,749 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:43:21,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:43:21,749 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:43:21,749 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:43:21,749 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:43:21,749 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:43:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-18 17:43:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 17:43:21,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:21,784 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 17:43:21,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -48518306, now seen corresponding path program 1 times [2020-08-18 17:43:21,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:21,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693698800] [2020-08-18 17:43:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,408 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:22,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 17:43:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:43:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:43:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:22,502 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 17:43:22,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693698800] [2020-08-18 17:43:22,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:22,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:43:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842113972] [2020-08-18 17:43:22,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:43:22,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:43:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:43:22,536 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-18 17:43:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:23,674 INFO L93 Difference]: Finished difference Result 300 states and 394 transitions. [2020-08-18 17:43:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:43:23,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 17:43:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:23,690 INFO L225 Difference]: With dead ends: 300 [2020-08-18 17:43:23,691 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 17:43:23,696 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 17:43:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 17:43:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-08-18 17:43:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-18 17:43:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-08-18 17:43:23,784 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 52 [2020-08-18 17:43:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:23,785 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-08-18 17:43:23,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:43:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-08-18 17:43:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 17:43:23,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:23,790 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 17:43:23,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:43:23,792 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 224052050, now seen corresponding path program 1 times [2020-08-18 17:43:23,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:23,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115657227] [2020-08-18 17:43:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,177 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:24,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:43:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:43:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 17:43:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:24,225 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 17:43:24,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115657227] [2020-08-18 17:43:24,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:24,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:43:24,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102745068] [2020-08-18 17:43:24,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:43:24,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:43:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:43:24,229 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 4 states. [2020-08-18 17:43:24,652 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:43:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:25,487 INFO L93 Difference]: Finished difference Result 229 states and 281 transitions. [2020-08-18 17:43:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:43:25,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 17:43:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:25,499 INFO L225 Difference]: With dead ends: 229 [2020-08-18 17:43:25,499 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 17:43:25,504 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 17:43:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 17:43:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-08-18 17:43:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 17:43:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-18 17:43:25,561 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 53 [2020-08-18 17:43:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:25,562 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-18 17:43:25,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:43:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-18 17:43:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:43:25,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:25,574 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 17:43:25,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:43:25,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1519728538, now seen corresponding path program 1 times [2020-08-18 17:43:25,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:25,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923143518] [2020-08-18 17:43:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,009 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:26,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:43:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:43:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 17:43:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:26,079 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 17:43:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923143518] [2020-08-18 17:43:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:43:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126181736] [2020-08-18 17:43:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:43:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:43:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:43:26,082 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 8 states. [2020-08-18 17:43:26,434 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:26,745 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:26,983 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:27,220 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:28,401 INFO L93 Difference]: Finished difference Result 242 states and 299 transitions. [2020-08-18 17:43:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:43:28,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-18 17:43:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:28,411 INFO L225 Difference]: With dead ends: 242 [2020-08-18 17:43:28,411 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 17:43:28,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 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 17:43:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 17:43:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-08-18 17:43:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 17:43:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-08-18 17:43:28,451 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 58 [2020-08-18 17:43:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:28,451 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-08-18 17:43:28,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:43:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-08-18 17:43:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 17:43:28,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:28,453 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] [2020-08-18 17:43:28,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:43:28,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -531263457, now seen corresponding path program 1 times [2020-08-18 17:43:28,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:28,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172517294] [2020-08-18 17:43:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,755 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:28,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 17:43:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:43:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:43:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 17:43:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 17:43:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 17:43:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:28,849 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 17:43:28,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172517294] [2020-08-18 17:43:28,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:28,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:43:28,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114755600] [2020-08-18 17:43:28,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:43:28,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:43:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:43:28,852 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 8 states. [2020-08-18 17:43:29,200 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:30,816 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:31,111 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:31,352 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:43:31,771 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:32,176 INFO L93 Difference]: Finished difference Result 363 states and 474 transitions. [2020-08-18 17:43:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:43:32,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-08-18 17:43:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:32,181 INFO L225 Difference]: With dead ends: 363 [2020-08-18 17:43:32,181 INFO L226 Difference]: Without dead ends: 267 [2020-08-18 17:43:32,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 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 17:43:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-08-18 17:43:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2020-08-18 17:43:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-18 17:43:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2020-08-18 17:43:32,243 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 71 [2020-08-18 17:43:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:32,243 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2020-08-18 17:43:32,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:43:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2020-08-18 17:43:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 17:43:32,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:32,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:32,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:43:32,246 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1398757657, now seen corresponding path program 1 times [2020-08-18 17:43:32,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:32,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150536822] [2020-08-18 17:43:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,526 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:43:32,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:43:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:43:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:43:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:43:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:43:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:43:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:43:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:43:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:43:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 17:43:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:43:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:43:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:43:32,652 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 17:43:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150536822] [2020-08-18 17:43:32,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:43:32,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:43:32,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489844838] [2020-08-18 17:43:32,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:43:32,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:43:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:43:32,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:43:32,655 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand 6 states. [2020-08-18 17:43:33,007 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:43:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:43:33,579 INFO L93 Difference]: Finished difference Result 348 states and 431 transitions. [2020-08-18 17:43:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:43:33,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-08-18 17:43:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:43:33,582 INFO L225 Difference]: With dead ends: 348 [2020-08-18 17:43:33,583 INFO L226 Difference]: Without dead ends: 156 [2020-08-18 17:43:33,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 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 17:43:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-18 17:43:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2020-08-18 17:43:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 17:43:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-08-18 17:43:33,613 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 75 [2020-08-18 17:43:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:43:33,614 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-08-18 17:43:33,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:43:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-08-18 17:43:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 17:43:33,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:43:33,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:43:33,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:43:33,616 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:43:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:43:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1135016507, now seen corresponding path program 1 times [2020-08-18 17:43:33,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:43:33,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521504482] [2020-08-18 17:43:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:43:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:43:33,707 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:43:33,708 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:43:33,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:43:33,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:43:33 BoogieIcfgContainer [2020-08-18 17:43:33,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:43:33,748 INFO L168 Benchmark]: Toolchain (without parser) took 13866.19 ms. Allocated memory was 140.5 MB in the beginning and 479.7 MB in the end (delta: 339.2 MB). Free memory was 101.5 MB in the beginning and 262.8 MB in the end (delta: -161.3 MB). Peak memory consumption was 177.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,749 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 618.09 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 172.9 MB in the end (delta: -71.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,751 INFO L168 Benchmark]: Boogie Preprocessor took 86.09 ms. Allocated memory is still 203.9 MB. Free memory was 172.9 MB in the beginning and 168.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,752 INFO L168 Benchmark]: RCFGBuilder took 1096.89 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 168.5 MB in the beginning and 193.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 82.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,753 INFO L168 Benchmark]: TraceAbstraction took 12060.37 ms. Allocated memory was 234.9 MB in the beginning and 479.7 MB in the end (delta: 244.8 MB). Free memory was 193.2 MB in the beginning and 262.8 MB in the end (delta: -69.6 MB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:43:33,757 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 618.09 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 172.9 MB in the end (delta: -71.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.09 ms. Allocated memory is still 203.9 MB. Free memory was 172.9 MB in the beginning and 168.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1096.89 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 168.5 MB in the beginning and 193.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 82.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12060.37 ms. Allocated memory was 234.9 MB in the beginning and 479.7 MB in the end (delta: 244.8 MB). Free memory was 193.2 MB in the beginning and 262.8 MB in the end (delta: -69.6 MB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 883]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L47] int waterLevel = 1; [L48] int methaneLevelCritical = 0; [L136] int cleanupTimeShifts = 4; [L407] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L675] int pumpRunning = 0; [L676] int systemActive = 1; [L215] int retValue_acc ; [L216] int tmp ; [L220] FCALL select_helpers() [L221] FCALL select_features() [L222] CALL, EXPR valid_product() [L914] int retValue_acc ; [L917] retValue_acc = 1 [L918] return (retValue_acc); [L222] RET, EXPR valid_product() [L222] tmp = valid_product() [L224] COND TRUE \read(tmp) [L226] FCALL setup() [L227] CALL runTest() [L206] CALL test() [L606] int splverifierCounter ; [L607] int tmp ; [L608] int tmp___0 ; [L609] int tmp___1 ; [L610] int tmp___2 ; [L613] splverifierCounter = 0 [L615] COND TRUE 1 [L617] COND TRUE splverifierCounter < 4 [L623] tmp = __VERIFIER_nondet_int() [L625] COND TRUE \read(tmp) [L627] CALL waterRise() [L65] COND TRUE waterLevel < 2 [L66] waterLevel = waterLevel + 1 [L627] RET waterRise() [L633] tmp___0 = __VERIFIER_nondet_int() [L635] COND FALSE !(\read(tmp___0)) [L643] tmp___2 = __VERIFIER_nondet_int() [L645] COND FALSE !(\read(tmp___2)) [L651] tmp___1 = __VERIFIER_nondet_int() [L653] COND TRUE \read(tmp___1) [L660] CALL timeShift() [L683] COND FALSE !(\read(pumpRunning)) [L690] COND TRUE \read(systemActive) [L692] CALL processEnvironment() [L738] int tmp ; [L741] COND FALSE !(\read(pumpRunning)) [L756] CALL processEnvironment__wrappee__methaneQuery() [L712] int tmp ; [L715] COND FALSE !(\read(pumpRunning)) [L730] FCALL processEnvironment__wrappee__base() [L756] RET processEnvironment__wrappee__methaneQuery() [L692] RET processEnvironment() [L698] CALL __utac_acc__Specification3_spec__1() [L924] int tmp ; [L925] int tmp___0 ; [L926] int tmp___1 ; [L930] CALL, EXPR isMethaneLevelCritical() [L86] int retValue_acc ; [L89] retValue_acc = methaneLevelCritical [L90] return (retValue_acc); [L930] RET, EXPR isMethaneLevelCritical() [L930] tmp = isMethaneLevelCritical() [L932] COND FALSE !(\read(tmp)) [L936] CALL, EXPR getWaterLevel() [L118] int retValue_acc ; [L121] retValue_acc = waterLevel [L122] return (retValue_acc); [L936] RET, EXPR getWaterLevel() [L936] tmp___0 = getWaterLevel() [L938] COND TRUE tmp___0 == 2 [L940] CALL, EXPR isPumpRunning() [L807] int retValue_acc ; [L810] retValue_acc = pumpRunning [L811] return (retValue_acc); [L940] RET, EXPR isPumpRunning() [L940] tmp___1 = isPumpRunning() [L942] COND FALSE !(\read(tmp___1)) [L946] CALL __automaton_fail() [L883] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 238 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.9s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 518 SDtfs, 796 SDslu, 263 SDs, 0 SdLazy, 1585 SolverSat, 534 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred 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, 149 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 384 NumberOfCodeBlocks, 384 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 88076 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...