/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:16:11,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:16:11,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:16:11,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:16:11,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:16:11,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:16:11,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:16:11,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:16:11,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:16:11,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:16:11,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:16:11,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:16:11,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:16:11,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:16:11,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:16:11,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:16:11,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:16:11,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:16:11,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:16:11,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:16:11,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:16:11,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:16:11,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:16:11,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:16:11,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:16:11,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:16:11,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:16:11,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:16:11,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:16:11,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:16:11,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:16:11,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:16:11,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:16:11,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:16:11,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:16:11,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:16:11,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:16:11,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:16:11,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:16:11,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:16:11,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:16:11,540 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 19:16:11,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:16:11,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:16:11,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:16:11,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:16:11,579 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:16:11,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:16:11,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:16:11,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:16:11,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:16:11,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:16:11,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:16:11,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:16:11,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:16:11,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:16:11,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:16:11,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:16:11,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:16:11,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:16:11,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:16:11,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:16:11,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:16:11,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:16:11,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:16:11,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:16:11,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:16:11,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:16:11,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:16:11,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:16:11,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:16:11,585 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:16:11,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:16:11,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:16:11,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:16:11,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:16:11,918 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:16:11,919 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-18 19:16:11,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a6805f6/c452c9b10908437daeb2d878fa3c9d8e/FLAGd9298b9b3 [2020-08-18 19:16:12,555 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:16:12,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product52.cil.c [2020-08-18 19:16:12,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a6805f6/c452c9b10908437daeb2d878fa3c9d8e/FLAGd9298b9b3 [2020-08-18 19:16:12,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a6805f6/c452c9b10908437daeb2d878fa3c9d8e [2020-08-18 19:16:12,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:16:12,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:16:12,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:16:12,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:16:12,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:16:12,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:16:12" (1/1) ... [2020-08-18 19:16:12,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62eea600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:12, skipping insertion in model container [2020-08-18 19:16:12,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:16:12" (1/1) ... [2020-08-18 19:16:12,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:16:12,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:16:13,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:16:13,491 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:16:13,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:16:13,613 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:16:13,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13 WrapperNode [2020-08-18 19:16:13,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:16:13,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:16:13,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:16:13,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:16:13,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (1/1) ... [2020-08-18 19:16:13,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:16:13,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:16:13,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:16:13,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:16:13,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (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 19:16:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:16:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:16:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 19:16:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 19:16:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 19:16:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 19:16:13,831 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 19:16:13,832 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 19:16:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 19:16:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 19:16:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 19:16:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 19:16:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 19:16:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 19:16:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 19:16:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 19:16:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 19:16:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 19:16:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 19:16:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 19:16:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:16:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 19:16:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 19:16:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 19:16:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 19:16:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 19:16:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 19:16:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:16:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:16:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 19:16:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 19:16:13,840 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 19:16:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 19:16:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 19:16:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 19:16:13,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 19:16:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 19:16:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:16:17,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:16:17,093 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 19:16:17,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:16:17 BoogieIcfgContainer [2020-08-18 19:16:17,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:16:17,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:16:17,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:16:17,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:16:17,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:16:12" (1/3) ... [2020-08-18 19:16:17,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e248b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:16:17, skipping insertion in model container [2020-08-18 19:16:17,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:16:13" (2/3) ... [2020-08-18 19:16:17,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e248b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:16:17, skipping insertion in model container [2020-08-18 19:16:17,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:16:17" (3/3) ... [2020-08-18 19:16:17,112 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product52.cil.c [2020-08-18 19:16:17,124 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:16:17,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:16:17,144 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:16:17,167 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:16:17,167 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:16:17,167 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:16:17,167 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:16:17,168 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:16:17,168 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:16:17,168 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:16:17,168 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:16:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2020-08-18 19:16:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 19:16:17,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:17,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:17,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1875422794, now seen corresponding path program 1 times [2020-08-18 19:16:17,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022359864] [2020-08-18 19:16:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:17,930 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:17,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:17,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:17,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:17,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:18,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 19:16:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:18,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:16:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:18,033 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 19:16:18,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022359864] [2020-08-18 19:16:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:16:18,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444400248] [2020-08-18 19:16:18,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:16:18,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:16:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:16:18,063 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 3 states. [2020-08-18 19:16:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:19,438 INFO L93 Difference]: Finished difference Result 320 states and 417 transitions. [2020-08-18 19:16:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:16:19,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 19:16:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:19,455 INFO L225 Difference]: With dead ends: 320 [2020-08-18 19:16:19,456 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 19:16:19,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 19:16:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 19:16:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-08-18 19:16:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 19:16:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-08-18 19:16:19,562 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 46 [2020-08-18 19:16:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:19,562 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-08-18 19:16:19,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:16:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-08-18 19:16:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 19:16:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:19,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:19,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:16:19,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2108875382, now seen corresponding path program 1 times [2020-08-18 19:16:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:19,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121448528] [2020-08-18 19:16:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,924 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:19,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:16:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 19:16:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:19,993 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 19:16:19,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121448528] [2020-08-18 19:16:19,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:19,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:16:19,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840961646] [2020-08-18 19:16:19,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:16:19,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:16:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:16:19,998 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 4 states. [2020-08-18 19:16:20,439 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:21,328 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2020-08-18 19:16:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:16:21,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 19:16:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:21,333 INFO L225 Difference]: With dead ends: 243 [2020-08-18 19:16:21,333 INFO L226 Difference]: Without dead ends: 157 [2020-08-18 19:16:21,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:16:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-18 19:16:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2020-08-18 19:16:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-18 19:16:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-08-18 19:16:21,373 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 47 [2020-08-18 19:16:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:21,373 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-08-18 19:16:21,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:16:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-08-18 19:16:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 19:16:21,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:21,376 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 19:16:21,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:16:21,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2135499519, now seen corresponding path program 1 times [2020-08-18 19:16:21,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:21,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310359865] [2020-08-18 19:16:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,711 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:16:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 19:16:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:21,781 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 19:16:21,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310359865] [2020-08-18 19:16:21,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:21,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 19:16:21,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271574770] [2020-08-18 19:16:21,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:16:21,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:16:21,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:16:21,784 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 8 states. [2020-08-18 19:16:22,212 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:22,550 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:22,811 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:23,025 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:23,755 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:25,613 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2020-08-18 19:16:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:16:25,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 19:16:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:25,623 INFO L225 Difference]: With dead ends: 442 [2020-08-18 19:16:25,623 INFO L226 Difference]: Without dead ends: 337 [2020-08-18 19:16:25,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:16:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-18 19:16:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2020-08-18 19:16:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-18 19:16:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2020-08-18 19:16:25,696 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 52 [2020-08-18 19:16:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:25,697 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2020-08-18 19:16:25,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:16:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2020-08-18 19:16:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 19:16:25,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:25,700 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 19:16:25,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:16:25,700 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1973278076, now seen corresponding path program 1 times [2020-08-18 19:16:25,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:25,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240665458] [2020-08-18 19:16:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,015 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:26,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:16:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 19:16:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 19:16:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:26,100 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 19:16:26,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240665458] [2020-08-18 19:16:26,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:26,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 19:16:26,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631209922] [2020-08-18 19:16:26,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:16:26,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:16:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:16:26,103 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 8 states. [2020-08-18 19:16:26,612 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:27,641 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:27,958 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:28,237 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:28,520 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:28,952 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:29,905 INFO L93 Difference]: Finished difference Result 877 states and 1135 transitions. [2020-08-18 19:16:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:16:29,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 19:16:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:29,915 INFO L225 Difference]: With dead ends: 877 [2020-08-18 19:16:29,915 INFO L226 Difference]: Without dead ends: 629 [2020-08-18 19:16:29,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:16:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-08-18 19:16:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2020-08-18 19:16:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-08-18 19:16:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 606 transitions. [2020-08-18 19:16:30,052 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 606 transitions. Word has length 57 [2020-08-18 19:16:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:30,053 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 606 transitions. [2020-08-18 19:16:30,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:16:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 606 transitions. [2020-08-18 19:16:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 19:16:30,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:30,057 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] [2020-08-18 19:16:30,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:16:30,057 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash -820899264, now seen corresponding path program 1 times [2020-08-18 19:16:30,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:30,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575827524] [2020-08-18 19:16:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,415 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:30,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 19:16:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:16:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 19:16:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 19:16:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:30,555 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 19:16:30,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575827524] [2020-08-18 19:16:30,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:30,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 19:16:30,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241125676] [2020-08-18 19:16:30,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:16:30,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:16:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:16:30,558 INFO L87 Difference]: Start difference. First operand 499 states and 606 transitions. Second operand 9 states. [2020-08-18 19:16:31,119 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:32,085 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:32,390 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:32,621 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:16:33,201 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:33,509 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:34,525 INFO L93 Difference]: Finished difference Result 1401 states and 1876 transitions. [2020-08-18 19:16:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 19:16:34,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 19:16:34,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:34,533 INFO L225 Difference]: With dead ends: 1401 [2020-08-18 19:16:34,534 INFO L226 Difference]: Without dead ends: 926 [2020-08-18 19:16:34,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 19:16:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-08-18 19:16:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 739. [2020-08-18 19:16:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-08-18 19:16:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 907 transitions. [2020-08-18 19:16:34,684 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 907 transitions. Word has length 61 [2020-08-18 19:16:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:34,685 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 907 transitions. [2020-08-18 19:16:34,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:16:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 907 transitions. [2020-08-18 19:16:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 19:16:34,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:34,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:34,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:16:34,688 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash 16386475, now seen corresponding path program 1 times [2020-08-18 19:16:34,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:34,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024531235] [2020-08-18 19:16:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,907 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:34,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 19:16:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:16:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:34,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:16:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:16:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 19:16:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:35,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 19:16:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:35,049 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 19:16:35,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024531235] [2020-08-18 19:16:35,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:35,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 19:16:35,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284864918] [2020-08-18 19:16:35,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:16:35,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:35,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:16:35,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:16:35,053 INFO L87 Difference]: Start difference. First operand 739 states and 907 transitions. Second operand 9 states. [2020-08-18 19:16:36,131 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:36,352 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:16:36,622 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:36,848 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:37,951 INFO L93 Difference]: Finished difference Result 1717 states and 2277 transitions. [2020-08-18 19:16:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:16:37,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-18 19:16:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:37,965 INFO L225 Difference]: With dead ends: 1717 [2020-08-18 19:16:37,965 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 19:16:37,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:16:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 19:16:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 765. [2020-08-18 19:16:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-18 19:16:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-18 19:16:38,154 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 84 [2020-08-18 19:16:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:38,154 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-18 19:16:38,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:16:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-18 19:16:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 19:16:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:38,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:38,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:16:38,159 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash 39018729, now seen corresponding path program 1 times [2020-08-18 19:16:38,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:38,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801024308] [2020-08-18 19:16:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,447 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:38,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 19:16:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:16:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:16:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:16:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 19:16:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 19:16:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:38,590 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 19:16:38,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801024308] [2020-08-18 19:16:38,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:38,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 19:16:38,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000953631] [2020-08-18 19:16:38,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:16:38,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:16:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:16:38,600 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 11 states. [2020-08-18 19:16:39,394 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:39,634 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:39,865 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:40,588 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:40,842 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:41,077 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:16:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:42,275 INFO L93 Difference]: Finished difference Result 1771 states and 2388 transitions. [2020-08-18 19:16:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:16:42,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-18 19:16:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:42,284 INFO L225 Difference]: With dead ends: 1771 [2020-08-18 19:16:42,284 INFO L226 Difference]: Without dead ends: 1030 [2020-08-18 19:16:42,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:16:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-08-18 19:16:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 781. [2020-08-18 19:16:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-08-18 19:16:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 951 transitions. [2020-08-18 19:16:42,413 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 951 transitions. Word has length 84 [2020-08-18 19:16:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:42,413 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 951 transitions. [2020-08-18 19:16:42,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:16:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 951 transitions. [2020-08-18 19:16:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 19:16:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:42,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:42,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:16:42,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1064510728, now seen corresponding path program 1 times [2020-08-18 19:16:42,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:42,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921155475] [2020-08-18 19:16:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,666 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:16:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:16:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:16:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:16:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:16:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:16:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 19:16:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:16:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:16:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:16:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:16:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 19:16:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 19:16:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:16:42,805 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 19:16:42,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921155475] [2020-08-18 19:16:42,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:16:42,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 19:16:42,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059061878] [2020-08-18 19:16:42,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 19:16:42,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:16:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 19:16:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:16:42,809 INFO L87 Difference]: Start difference. First operand 781 states and 951 transitions. Second operand 7 states. [2020-08-18 19:16:43,240 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:43,768 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:16:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:16:46,379 INFO L93 Difference]: Finished difference Result 2699 states and 3665 transitions. [2020-08-18 19:16:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 19:16:46,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-08-18 19:16:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:16:46,395 INFO L225 Difference]: With dead ends: 2699 [2020-08-18 19:16:46,395 INFO L226 Difference]: Without dead ends: 1942 [2020-08-18 19:16:46,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:16:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2020-08-18 19:16:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1619. [2020-08-18 19:16:46,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2020-08-18 19:16:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1989 transitions. [2020-08-18 19:16:46,681 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1989 transitions. Word has length 84 [2020-08-18 19:16:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:16:46,681 INFO L479 AbstractCegarLoop]: Abstraction has 1619 states and 1989 transitions. [2020-08-18 19:16:46,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 19:16:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1989 transitions. [2020-08-18 19:16:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 19:16:46,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:16:46,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:16:46,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:16:46,685 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:16:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:16:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1546821858, now seen corresponding path program 1 times [2020-08-18 19:16:46,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:16:46,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351956242] [2020-08-18 19:16:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:16:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:16:46,738 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:16:46,739 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:16:46,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:16:46,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:16:46 BoogieIcfgContainer [2020-08-18 19:16:46,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:16:46,770 INFO L168 Benchmark]: Toolchain (without parser) took 33864.62 ms. Allocated memory was 140.0 MB in the beginning and 675.3 MB in the end (delta: 535.3 MB). Free memory was 102.0 MB in the beginning and 273.1 MB in the end (delta: -171.1 MB). Peak memory consumption was 364.2 MB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,771 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.47 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 169.5 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,773 INFO L168 Benchmark]: Boogie Preprocessor took 126.33 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 165.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,773 INFO L168 Benchmark]: RCFGBuilder took 3360.48 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 164.6 MB in the beginning and 192.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,774 INFO L168 Benchmark]: TraceAbstraction took 29664.65 ms. Allocated memory was 235.4 MB in the beginning and 675.3 MB in the end (delta: 439.9 MB). Free memory was 192.3 MB in the beginning and 273.1 MB in the end (delta: -80.8 MB). Peak memory consumption was 359.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:16:46,778 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.47 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 169.5 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.33 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 165.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3360.48 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 164.6 MB in the beginning and 192.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29664.65 ms. Allocated memory was 235.4 MB in the beginning and 675.3 MB in the end (delta: 439.9 MB). Free memory was 192.3 MB in the beginning and 273.1 MB in the end (delta: -80.8 MB). Peak memory consumption was 359.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 383]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L48] int waterLevel = 1; [L49] int methaneLevelCritical = 0; [L158] int pumpRunning = 0; [L159] int systemActive = 1; [L458] int cleanupTimeShifts = 4; [L752] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L534] int retValue_acc ; [L535] int tmp ; [L539] FCALL select_helpers() [L540] FCALL select_features() [L541] CALL, EXPR valid_product() [L975] int retValue_acc ; [L978] retValue_acc = 1 [L979] return (retValue_acc); [L541] RET, EXPR valid_product() [L541] tmp = valid_product() [L543] COND TRUE \read(tmp) [L545] FCALL setup() [L546] CALL runTest() [L525] CALL test() [L390] int splverifierCounter ; [L391] int tmp ; [L392] int tmp___0 ; [L393] int tmp___1 ; [L394] int tmp___2 ; [L397] splverifierCounter = 0 [L399] COND TRUE 1 [L401] COND TRUE splverifierCounter < 4 [L407] tmp = __VERIFIER_nondet_int() [L409] COND TRUE \read(tmp) [L411] CALL waterRise() [L66] COND TRUE waterLevel < 2 [L67] waterLevel = waterLevel + 1 [L411] RET waterRise() [L417] tmp___0 = __VERIFIER_nondet_int() [L419] COND TRUE \read(tmp___0) [L421] CALL changeMethaneLevel() [L78] COND FALSE !(\read(methaneLevelCritical)) [L81] methaneLevelCritical = 1 [L421] RET changeMethaneLevel() [L427] tmp___2 = __VERIFIER_nondet_int() [L429] COND FALSE !(\read(tmp___2)) [L435] tmp___1 = __VERIFIER_nondet_int() [L437] COND FALSE !(\read(tmp___1)) [L446] CALL timeShift() [L166] COND FALSE !(\read(pumpRunning)) [L173] COND TRUE \read(systemActive) [L175] CALL processEnvironment() [L221] int tmp ; [L224] COND FALSE !(\read(pumpRunning)) [L239] CALL processEnvironment__wrappee__highWaterSensor() [L195] int tmp ; [L198] COND TRUE ! pumpRunning [L200] CALL, EXPR isHighWaterLevel() [L318] int retValue_acc ; [L319] int tmp ; [L320] int tmp___0 ; [L324] CALL, EXPR isHighWaterSensorDry() [L128] int retValue_acc ; [L131] COND FALSE !(waterLevel < 2) [L135] retValue_acc = 0 [L136] return (retValue_acc); [L324] RET, EXPR isHighWaterSensorDry() [L324] tmp = isHighWaterSensorDry() [L326] COND FALSE !(\read(tmp)) [L329] tmp___0 = 1 [L331] retValue_acc = tmp___0 [L332] return (retValue_acc); [L200] RET, EXPR isHighWaterLevel() [L200] tmp = isHighWaterLevel() [L202] COND TRUE \read(tmp) [L204] CALL activatePump() [L249] pumpRunning = 1 [L204] RET activatePump() [L239] RET processEnvironment__wrappee__highWaterSensor() [L175] RET processEnvironment() [L181] CALL __utac_acc__Specification1_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR isMethaneLevelCritical() [L87] int retValue_acc ; [L90] retValue_acc = methaneLevelCritical [L91] return (retValue_acc); [L563] RET, EXPR isMethaneLevelCritical() [L563] tmp = isMethaneLevelCritical() [L565] COND TRUE \read(tmp) [L567] CALL, EXPR isPumpRunning() [L273] int retValue_acc ; [L276] retValue_acc = pumpRunning [L277] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___0 = isPumpRunning() [L569] COND TRUE \read(tmp___0) [L571] CALL __automaton_fail() [L383] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1814 SDslu, 1115 SDs, 0 SdLazy, 5438 SolverSat, 1165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1619occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 1254 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...