/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:54:18,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:54:18,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:54:18,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:54:18,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:54:18,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:54:18,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:54:18,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:54:18,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:54:18,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:54:18,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:54:18,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:54:18,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:54:18,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:54:18,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:54:18,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:54:18,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:54:18,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:54:18,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:54:18,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:54:18,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:54:18,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:54:18,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:54:18,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:54:18,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:54:18,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:54:18,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:54:18,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:54:18,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:54:18,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:54:18,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:54:18,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:54:18,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:54:18,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:54:18,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:54:18,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:54:18,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:54:18,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:54:18,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:54:18,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:54:18,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:54:18,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:54:18,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:54:18,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:54:18,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:54:18,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:54:18,573 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:54:18,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:54:18,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:54:18,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:54:18,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:54:18,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:54:18,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:54:18,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:54:18,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:54:18,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:54:18,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:54:18,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:54:18,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:54:18,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:54:18,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:54:18,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:54:18,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:54:18,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:18,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:54:18,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:54:18,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:54:18,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:54:18,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:54:18,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:54:18,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:54:18,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:54:18,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:54:18,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:54:18,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:54:18,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:54:18,926 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:54:18,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 11:54:18,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341fdd1ec/4b7a3f8da0854a3eaaca14b110851d1a/FLAG5fcae166f [2020-08-18 11:54:19,491 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:54:19,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 11:54:19,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341fdd1ec/4b7a3f8da0854a3eaaca14b110851d1a/FLAG5fcae166f [2020-08-18 11:54:19,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/341fdd1ec/4b7a3f8da0854a3eaaca14b110851d1a [2020-08-18 11:54:19,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:54:19,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:54:19,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:19,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:54:19,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:54:19,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:19" (1/1) ... [2020-08-18 11:54:19,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7331a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:19, skipping insertion in model container [2020-08-18 11:54:19,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:19" (1/1) ... [2020-08-18 11:54:19,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:54:19,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:54:20,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:20,404 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:54:20,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:20,519 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:54:20,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20 WrapperNode [2020-08-18 11:54:20,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:20,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:54:20,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:54:20,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:54:20,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... [2020-08-18 11:54:20,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:54:20,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:54:20,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:54:20,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:54:20,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:20,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:54:20,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:54:20,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:20,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:54:20,713 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:54:20,713 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:54:20,713 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:54:20,713 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 11:54:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 11:54:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 11:54:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:54:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:54:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:54:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:54:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:20,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:54:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:54:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:54:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:54:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:54:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:54:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:54:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:54:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:54:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:54:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:54:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:54:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:54:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:54:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:54:20,725 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:54:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:54:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:54:23,925 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:54:23,925 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:54:23,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:23 BoogieIcfgContainer [2020-08-18 11:54:23,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:54:23,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:54:23,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:54:23,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:54:23,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:54:19" (1/3) ... [2020-08-18 11:54:23,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bde67fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:23, skipping insertion in model container [2020-08-18 11:54:23,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:20" (2/3) ... [2020-08-18 11:54:23,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bde67fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:23, skipping insertion in model container [2020-08-18 11:54:23,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:23" (3/3) ... [2020-08-18 11:54:23,946 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product36.cil.c [2020-08-18 11:54:23,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:54:23,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:54:23,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:54:24,009 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:54:24,009 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:54:24,009 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:54:24,009 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:54:24,009 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:54:24,010 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:54:24,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:54:24,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:54:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-08-18 11:54:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:54:24,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:24,043 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 11:54:24,043 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1779053206, now seen corresponding path program 1 times [2020-08-18 11:54:24,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:24,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245039299] [2020-08-18 11:54:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,744 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:24,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:54:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:54:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:24,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245039299] [2020-08-18 11:54:24,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:24,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:54:24,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819499398] [2020-08-18 11:54:24,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:54:24,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:24,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:54:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:54:24,959 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 3 states. [2020-08-18 11:54:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:26,113 INFO L93 Difference]: Finished difference Result 278 states and 364 transitions. [2020-08-18 11:54:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:54:26,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 11:54:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:26,129 INFO L225 Difference]: With dead ends: 278 [2020-08-18 11:54:26,130 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 11:54:26,134 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 11:54:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 11:54:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2020-08-18 11:54:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 11:54:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-08-18 11:54:26,217 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 46 [2020-08-18 11:54:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:26,218 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-08-18 11:54:26,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:54:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-08-18 11:54:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 11:54:26,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:26,222 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 11:54:26,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:54:26,222 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash 83171531, now seen corresponding path program 1 times [2020-08-18 11:54:26,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:26,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161636782] [2020-08-18 11:54:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,567 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:54:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:26,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161636782] [2020-08-18 11:54:26,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:26,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:54:26,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296782627] [2020-08-18 11:54:26,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:54:26,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:26,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:54:26,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:54:26,659 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 4 states. [2020-08-18 11:54:27,160 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:27,830 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2020-08-18 11:54:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:54:27,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 11:54:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:27,833 INFO L225 Difference]: With dead ends: 198 [2020-08-18 11:54:27,834 INFO L226 Difference]: Without dead ends: 135 [2020-08-18 11:54:27,835 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 11:54:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-18 11:54:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-08-18 11:54:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 11:54:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-08-18 11:54:27,872 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 47 [2020-08-18 11:54:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:27,872 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-08-18 11:54:27,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:54:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-08-18 11:54:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 11:54:27,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:27,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:27,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:54:27,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash -532729622, now seen corresponding path program 1 times [2020-08-18 11:54:27,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:27,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183151597] [2020-08-18 11:54:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,198 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:28,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:54:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 11:54:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:28,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183151597] [2020-08-18 11:54:28,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:28,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:54:28,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340311724] [2020-08-18 11:54:28,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:54:28,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:54:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:54:28,294 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 8 states. [2020-08-18 11:54:28,723 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:29,047 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:29,306 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:29,566 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:30,291 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:31,750 INFO L93 Difference]: Finished difference Result 378 states and 466 transitions. [2020-08-18 11:54:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:54:31,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 11:54:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:31,756 INFO L225 Difference]: With dead ends: 378 [2020-08-18 11:54:31,756 INFO L226 Difference]: Without dead ends: 293 [2020-08-18 11:54:31,757 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 11:54:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-18 11:54:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 220. [2020-08-18 11:54:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-08-18 11:54:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2020-08-18 11:54:31,826 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 52 [2020-08-18 11:54:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:31,827 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2020-08-18 11:54:31,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:54:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2020-08-18 11:54:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:54:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:31,829 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 11:54:31,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:54:31,830 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash 692647563, now seen corresponding path program 1 times [2020-08-18 11:54:31,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:31,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874855336] [2020-08-18 11:54:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,158 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:54:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:54:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:54:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:32,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874855336] [2020-08-18 11:54:32,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:32,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:54:32,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487941954] [2020-08-18 11:54:32,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:54:32,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:54:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:54:32,234 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand 8 states. [2020-08-18 11:54:32,691 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:33,763 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:34,050 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:34,346 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:34,575 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:34,890 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:35,640 INFO L93 Difference]: Finished difference Result 713 states and 925 transitions. [2020-08-18 11:54:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:54:35,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 11:54:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:35,647 INFO L225 Difference]: With dead ends: 713 [2020-08-18 11:54:35,647 INFO L226 Difference]: Without dead ends: 517 [2020-08-18 11:54:35,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:54:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-08-18 11:54:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 395. [2020-08-18 11:54:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-08-18 11:54:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 474 transitions. [2020-08-18 11:54:35,773 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 474 transitions. Word has length 57 [2020-08-18 11:54:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:35,774 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 474 transitions. [2020-08-18 11:54:35,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:54:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 474 transitions. [2020-08-18 11:54:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 11:54:35,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:35,777 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 11:54:35,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:54:35,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1256704497, now seen corresponding path program 1 times [2020-08-18 11:54:35,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:35,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482359378] [2020-08-18 11:54:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,053 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:36,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:54:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:54:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 11:54:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:36,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482359378] [2020-08-18 11:54:36,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:36,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:54:36,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844174695] [2020-08-18 11:54:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:54:36,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:54:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:54:36,208 INFO L87 Difference]: Start difference. First operand 395 states and 474 transitions. Second operand 9 states. [2020-08-18 11:54:36,641 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:37,628 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:37,923 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:38,183 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:38,670 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:38,978 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:39,817 INFO L93 Difference]: Finished difference Result 1150 states and 1524 transitions. [2020-08-18 11:54:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:54:39,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 11:54:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:39,825 INFO L225 Difference]: With dead ends: 1150 [2020-08-18 11:54:39,825 INFO L226 Difference]: Without dead ends: 779 [2020-08-18 11:54:39,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:54:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-08-18 11:54:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 615. [2020-08-18 11:54:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-08-18 11:54:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-08-18 11:54:39,955 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 61 [2020-08-18 11:54:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:39,956 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-08-18 11:54:39,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:54:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-08-18 11:54:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 11:54:39,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:39,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:39,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:54:39,960 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash 148740965, now seen corresponding path program 1 times [2020-08-18 11:54:39,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:39,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705251678] [2020-08-18 11:54:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,275 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:40,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:54:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 11:54:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:54:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:40,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705251678] [2020-08-18 11:54:40,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:40,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:54:40,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216145765] [2020-08-18 11:54:40,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:54:40,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:54:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:54:40,390 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 9 states. [2020-08-18 11:54:40,850 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:41,812 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:42,060 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:42,351 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:42,619 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:44,236 INFO L93 Difference]: Finished difference Result 2147 states and 3042 transitions. [2020-08-18 11:54:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:54:44,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 11:54:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:44,247 INFO L225 Difference]: With dead ends: 2147 [2020-08-18 11:54:44,248 INFO L226 Difference]: Without dead ends: 1556 [2020-08-18 11:54:44,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:54:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2020-08-18 11:54:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1159. [2020-08-18 11:54:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-08-18 11:54:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2020-08-18 11:54:44,438 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 79 [2020-08-18 11:54:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:44,439 INFO L479 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2020-08-18 11:54:44,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:54:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2020-08-18 11:54:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 11:54:44,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:44,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:44,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:54:44,443 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2136122490, now seen corresponding path program 1 times [2020-08-18 11:54:44,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:44,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020168697] [2020-08-18 11:54:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,711 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:54:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 11:54:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:54:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:44,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020168697] [2020-08-18 11:54:44,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:44,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:54:44,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697664372] [2020-08-18 11:54:44,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:54:44,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:44,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:54:44,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:54:44,829 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand 9 states. [2020-08-18 11:54:46,186 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:46,399 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:46,662 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:46,908 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:48,010 INFO L93 Difference]: Finished difference Result 2704 states and 3585 transitions. [2020-08-18 11:54:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:54:48,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 11:54:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:48,025 INFO L225 Difference]: With dead ends: 2704 [2020-08-18 11:54:48,026 INFO L226 Difference]: Without dead ends: 1569 [2020-08-18 11:54:48,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:54:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-08-18 11:54:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1199. [2020-08-18 11:54:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2020-08-18 11:54:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1452 transitions. [2020-08-18 11:54:48,208 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1452 transitions. Word has length 79 [2020-08-18 11:54:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:48,209 INFO L479 AbstractCegarLoop]: Abstraction has 1199 states and 1452 transitions. [2020-08-18 11:54:48,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:54:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1452 transitions. [2020-08-18 11:54:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 11:54:48,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:48,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:48,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:54:48,212 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1649371716, now seen corresponding path program 1 times [2020-08-18 11:54:48,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:48,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438005992] [2020-08-18 11:54:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,474 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:48,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:54:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 11:54:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 11:54:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:48,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438005992] [2020-08-18 11:54:48,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:48,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:54:48,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797349550] [2020-08-18 11:54:48,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:54:48,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:54:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:54:48,610 INFO L87 Difference]: Start difference. First operand 1199 states and 1452 transitions. Second operand 11 states. [2020-08-18 11:54:49,368 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:49,604 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:49,831 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:50,523 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:50,782 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:51,030 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:51,931 INFO L93 Difference]: Finished difference Result 2398 states and 3135 transitions. [2020-08-18 11:54:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:54:51,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-18 11:54:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:51,940 INFO L225 Difference]: With dead ends: 2398 [2020-08-18 11:54:51,940 INFO L226 Difference]: Without dead ends: 1223 [2020-08-18 11:54:51,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:54:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2020-08-18 11:54:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 973. [2020-08-18 11:54:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-08-18 11:54:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1148 transitions. [2020-08-18 11:54:52,149 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1148 transitions. Word has length 79 [2020-08-18 11:54:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:52,149 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 1148 transitions. [2020-08-18 11:54:52,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:54:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1148 transitions. [2020-08-18 11:54:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 11:54:52,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:52,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:52,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:54:52,153 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash -453271351, now seen corresponding path program 1 times [2020-08-18 11:54:52,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:52,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854407052] [2020-08-18 11:54:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:54:52,207 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:54:52,208 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:54:52,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:54:52,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:54:52 BoogieIcfgContainer [2020-08-18 11:54:52,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:54:52,238 INFO L168 Benchmark]: Toolchain (without parser) took 32385.53 ms. Allocated memory was 140.0 MB in the beginning and 669.5 MB in the end (delta: 529.5 MB). Free memory was 101.6 MB in the beginning and 520.2 MB in the end (delta: -418.6 MB). Peak memory consumption was 111.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,242 INFO L168 Benchmark]: CDTParser took 0.14 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: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 169.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,245 INFO L168 Benchmark]: Boogie Preprocessor took 114.73 ms. Allocated memory is still 202.9 MB. Free memory was 169.9 MB in the beginning and 166.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,247 INFO L168 Benchmark]: RCFGBuilder took 3299.30 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 197.4 MB in the end (delta: -31.3 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,248 INFO L168 Benchmark]: TraceAbstraction took 28298.12 ms. Allocated memory was 235.4 MB in the beginning and 669.5 MB in the end (delta: 434.1 MB). Free memory was 195.7 MB in the beginning and 520.2 MB in the end (delta: -324.5 MB). Peak memory consumption was 109.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:52,251 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 666.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 169.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.73 ms. Allocated memory is still 202.9 MB. Free memory was 169.9 MB in the beginning and 166.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3299.30 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 197.4 MB in the end (delta: -31.3 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28298.12 ms. Allocated memory was 235.4 MB in the beginning and 669.5 MB in the end (delta: 434.1 MB). Free memory was 195.7 MB in the beginning and 520.2 MB in the end (delta: -324.5 MB). Peak memory consumption was 109.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L60] int pumpRunning = 0; [L61] int systemActive = 1; [L239] int waterLevel = 1; [L240] int methaneLevelCritical = 0; [L610] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L833] int cleanupTimeShifts = 4; [L906] int retValue_acc ; [L907] int tmp ; [L911] FCALL select_helpers() [L912] FCALL select_features() [L913] CALL, EXPR valid_product() [L432] int retValue_acc ; [L435] retValue_acc = 1 [L436] return (retValue_acc); [L913] RET, EXPR valid_product() [L913] tmp = valid_product() [L915] COND TRUE \read(tmp) [L917] FCALL setup() [L918] CALL runTest() [L900] CALL test() [L335] int splverifierCounter ; [L336] int tmp ; [L337] int tmp___0 ; [L338] int tmp___1 ; [L339] int tmp___2 ; [L342] splverifierCounter = 0 [L344] COND TRUE 1 [L346] COND TRUE splverifierCounter < 4 [L352] tmp = __VERIFIER_nondet_int() [L354] COND TRUE \read(tmp) [L356] CALL waterRise() [L257] COND TRUE waterLevel < 2 [L258] waterLevel = waterLevel + 1 [L356] RET waterRise() [L362] tmp___0 = __VERIFIER_nondet_int() [L364] COND TRUE \read(tmp___0) [L366] CALL changeMethaneLevel() [L269] COND FALSE !(\read(methaneLevelCritical)) [L272] methaneLevelCritical = 1 [L366] RET changeMethaneLevel() [L372] tmp___2 = __VERIFIER_nondet_int() [L374] COND FALSE !(\read(tmp___2)) [L380] tmp___1 = __VERIFIER_nondet_int() [L382] COND FALSE !(\read(tmp___1)) [L391] CALL timeShift() [L68] COND FALSE !(\read(pumpRunning)) [L75] COND TRUE \read(systemActive) [L77] CALL processEnvironment() [L97] int tmp ; [L100] COND TRUE ! pumpRunning [L102] CALL, EXPR isHighWaterLevel() [L194] int retValue_acc ; [L195] int tmp ; [L196] int tmp___0 ; [L200] CALL, EXPR isHighWaterSensorDry() [L319] int retValue_acc ; [L322] COND FALSE !(waterLevel < 2) [L326] retValue_acc = 0 [L327] return (retValue_acc); [L200] RET, EXPR isHighWaterSensorDry() [L200] tmp = isHighWaterSensorDry() [L202] COND FALSE !(\read(tmp)) [L205] tmp___0 = 1 [L207] retValue_acc = tmp___0 [L208] return (retValue_acc); [L102] RET, EXPR isHighWaterLevel() [L102] tmp = isHighWaterLevel() [L104] COND TRUE \read(tmp) [L106] CALL activatePump() [L125] pumpRunning = 1 [L106] RET activatePump() [L77] RET processEnvironment() [L83] CALL __utac_acc__Specification1_spec__1() [L808] int tmp ; [L809] int tmp___0 ; [L813] CALL, EXPR isMethaneLevelCritical() [L278] int retValue_acc ; [L281] retValue_acc = methaneLevelCritical [L282] return (retValue_acc); [L813] RET, EXPR isMethaneLevelCritical() [L813] tmp = isMethaneLevelCritical() [L815] COND TRUE \read(tmp) [L817] CALL, EXPR isPumpRunning() [L149] int retValue_acc ; [L152] retValue_acc = pumpRunning [L153] return (retValue_acc); [L817] RET, EXPR isPumpRunning() [L817] tmp___0 = isPumpRunning() [L819] COND TRUE \read(tmp___0) [L821] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 225 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.2s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 834 SDtfs, 1659 SDslu, 1097 SDs, 0 SdLazy, 4880 SolverSat, 1144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1199occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 8 MinimizatonAttempts, 1435 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 583 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 492 ConstructedInterpolants, 0 QuantifiedInterpolants, 143100 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...