/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_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:01:27,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:01:27,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:01:27,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:01:27,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:01:27,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:01:27,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:01:27,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:01:27,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:01:27,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:01:27,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:01:27,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:01:27,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:01:27,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:01:27,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:01:27,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:01:27,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:01:27,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:01:27,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:01:27,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:01:27,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:01:27,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:01:27,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:01:27,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:01:27,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:01:27,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:01:27,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:01:27,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:01:27,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:01:27,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:01:27,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:01:27,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:01:27,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:01:27,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:01:27,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:01:27,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:01:27,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:01:27,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:01:27,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:01:27,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:01:27,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:01:27,611 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 12:01:27,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:01:27,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:01:27,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:01:27,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:01:27,654 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:01:27,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:01:27,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:01:27,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:01:27,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:01:27,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:01:27,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:01:27,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:01:27,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:01:27,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:01:27,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:01:27,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:01:27,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:01:27,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:01:27,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:01:27,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:01:27,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:01:27,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:01:27,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:01:27,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:01:27,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:01:27,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:01:27,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:01:27,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:01:27,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:01:27,660 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 12:01:27,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:01:27,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:01:27,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:01:27,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:01:27,999 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:01:28,000 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 12:01:28,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85508da0/4fc19630851c48149a863ac9f26530ca/FLAG2564da935 [2020-08-18 12:01:28,605 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:01:28,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 12:01:28,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85508da0/4fc19630851c48149a863ac9f26530ca/FLAG2564da935 [2020-08-18 12:01:28,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85508da0/4fc19630851c48149a863ac9f26530ca [2020-08-18 12:01:28,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:01:28,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:01:28,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:01:28,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:01:28,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:01:28,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:01:28" (1/1) ... [2020-08-18 12:01:28,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20abf48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:28, skipping insertion in model container [2020-08-18 12:01:28,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:01:28" (1/1) ... [2020-08-18 12:01:28,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:01:28,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:01:29,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:01:29,486 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:01:29,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:01:29,628 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:01:29,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29 WrapperNode [2020-08-18 12:01:29,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:01:29,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:01:29,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:01:29,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:01:29,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (1/1) ... [2020-08-18 12:01:29,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:01:29,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:01:29,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:01:29,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:01:29,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (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 12:01:29,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:01:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:01:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 12:01:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 12:01:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 12:01:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 12:01:29,787 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 12:01:29,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 12:01:29,789 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 12:01:29,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 12:01:29,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 12:01:29,792 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 12:01:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 12:01:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 12:01:29,795 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 12:01:29,796 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 12:01:29,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 12:01:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 12:01:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 12:01:29,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:01:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 12:01:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:01:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 12:01:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:01:30,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:01:30,863 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 12:01:30,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:01:30 BoogieIcfgContainer [2020-08-18 12:01:30,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:01:30,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:01:30,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:01:30,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:01:30,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:01:28" (1/3) ... [2020-08-18 12:01:30,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250afecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:01:30, skipping insertion in model container [2020-08-18 12:01:30,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:29" (2/3) ... [2020-08-18 12:01:30,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250afecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:01:30, skipping insertion in model container [2020-08-18 12:01:30,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:01:30" (3/3) ... [2020-08-18 12:01:30,880 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-18 12:01:30,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:01:30,898 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:01:30,910 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:01:30,932 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:01:30,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:01:30,933 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:01:30,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:01:30,933 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:01:30,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:01:30,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:01:30,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:01:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-18 12:01:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 12:01:30,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:30,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:01:30,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-18 12:01:30,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:30,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793224095] [2020-08-18 12:01:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,647 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:31,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:01:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 12:01:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:31,731 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 12:01:31,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793224095] [2020-08-18 12:01:31,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:31,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 12:01:31,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970504] [2020-08-18 12:01:31,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 12:01:31,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 12:01:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 12:01:31,759 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-18 12:01:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:33,050 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-18 12:01:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 12:01:33,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 12:01:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:33,068 INFO L225 Difference]: With dead ends: 358 [2020-08-18 12:01:33,069 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 12:01:33,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 12:01:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 12:01:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-18 12:01:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 12:01:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-18 12:01:33,202 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-18 12:01:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:33,202 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-18 12:01:33,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 12:01:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-18 12:01:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 12:01:33,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:33,207 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 12:01:33,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:01:33,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-18 12:01:33,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:33,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811261625] [2020-08-18 12:01:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,519 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:33,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:01:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 12:01:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:33,564 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 12:01:33,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811261625] [2020-08-18 12:01:33,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:33,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:01:33,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228210018] [2020-08-18 12:01:33,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:01:33,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:01:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:01:33,569 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-18 12:01:34,000 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:01:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:35,079 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-18 12:01:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:01:35,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 12:01:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:35,084 INFO L225 Difference]: With dead ends: 281 [2020-08-18 12:01:35,084 INFO L226 Difference]: Without dead ends: 177 [2020-08-18 12:01:35,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:01:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-18 12:01:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-18 12:01:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-18 12:01:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-18 12:01:35,127 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-18 12:01:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:35,127 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-18 12:01:35,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:01:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-18 12:01:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 12:01:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:35,130 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 12:01:35,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:01:35,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-18 12:01:35,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:35,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502653996] [2020-08-18 12:01:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,448 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:35,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 12:01:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:01:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:35,514 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 12:01:35,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502653996] [2020-08-18 12:01:35,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:35,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:01:35,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046870649] [2020-08-18 12:01:35,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:01:35,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:01:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:01:35,517 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-18 12:01:35,905 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:36,231 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:36,488 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:36,717 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:37,452 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:01:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:39,678 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-18 12:01:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:01:39,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 12:01:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:39,685 INFO L225 Difference]: With dead ends: 500 [2020-08-18 12:01:39,685 INFO L226 Difference]: Without dead ends: 377 [2020-08-18 12:01:39,687 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 12:01:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-18 12:01:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-18 12:01:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-18 12:01:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-18 12:01:39,765 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-18 12:01:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:39,766 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-18 12:01:39,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:01:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-18 12:01:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 12:01:39,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:39,769 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 12:01:39,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:01:39,769 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-18 12:01:39,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:39,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650822364] [2020-08-18 12:01:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,091 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:01:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 12:01:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:01:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:01:40,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650822364] [2020-08-18 12:01:40,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:40,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 12:01:40,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601333436] [2020-08-18 12:01:40,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:01:40,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:40,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:01:40,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:01:40,228 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-18 12:01:40,716 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:41,084 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:41,339 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:41,586 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:42,166 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:01:43,013 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:43,396 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:01:43,755 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:01:44,014 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:01:44,288 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:44,648 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:01:45,036 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:01:45,438 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:47,792 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-18 12:01:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 12:01:47,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 12:01:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:47,801 INFO L225 Difference]: With dead ends: 1257 [2020-08-18 12:01:47,801 INFO L226 Difference]: Without dead ends: 973 [2020-08-18 12:01:47,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 12:01:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-18 12:01:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-18 12:01:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 12:01:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-18 12:01:48,011 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-18 12:01:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:48,012 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-18 12:01:48,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:01:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-18 12:01:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 12:01:48,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:48,016 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 12:01:48,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:01:48,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-18 12:01:48,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:48,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740284086] [2020-08-18 12:01:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,315 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:48,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:01:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:01:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:01:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 12:01:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:48,398 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 12:01:48,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740284086] [2020-08-18 12:01:48,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:48,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:01:48,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450127542] [2020-08-18 12:01:48,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:01:48,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:01:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:01:48,400 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-18 12:01:48,847 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:51,036 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-18 12:01:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:01:51,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 12:01:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:51,052 INFO L225 Difference]: With dead ends: 2053 [2020-08-18 12:01:51,053 INFO L226 Difference]: Without dead ends: 1205 [2020-08-18 12:01:51,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:01:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-18 12:01:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-18 12:01:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-18 12:01:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-18 12:01:51,450 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-18 12:01:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:51,452 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-18 12:01:51,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:01:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-18 12:01:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 12:01:51,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:51,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:51,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:01:51,457 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-18 12:01:51,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:51,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503007162] [2020-08-18 12:01:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,787 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:51,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:01:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:01:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:01:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:01:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 12:01:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 12:01:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 12:01:51,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503007162] [2020-08-18 12:01:51,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:01:51,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:01:51,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824903902] [2020-08-18 12:01:51,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:01:51,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:01:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:01:51,940 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-18 12:01:52,559 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 12:01:53,210 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:55,259 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:01:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:57,526 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-18 12:01:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 12:01:57,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 12:01:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:57,538 INFO L225 Difference]: With dead ends: 2165 [2020-08-18 12:01:57,538 INFO L226 Difference]: Without dead ends: 1340 [2020-08-18 12:01:57,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:01:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-18 12:01:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-18 12:01:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-18 12:01:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-18 12:01:57,824 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-18 12:01:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:57,825 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-18 12:01:57,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:01:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-18 12:01:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 12:01:57,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:57,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:57,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:01:57,834 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:57,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-18 12:01:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:57,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145844786] [2020-08-18 12:01:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,100 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:01:58,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:01:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:01:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:01:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:01:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:01:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:01:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 12:01:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 12:01:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:01:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 12:01:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 12:01:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 12:01:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 12:01:58,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145844786] [2020-08-18 12:01:58,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:01:58,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:01:58,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500053706] [2020-08-18 12:01:58,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:01:58,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:58,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:01:58,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:01:58,276 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 10 states. [2020-08-18 12:01:59,327 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:01:59,576 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 12:01:59,833 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:00,073 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:01,161 INFO L93 Difference]: Finished difference Result 2574 states and 3341 transitions. [2020-08-18 12:02:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:02:01,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-18 12:02:01,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:01,173 INFO L225 Difference]: With dead ends: 2574 [2020-08-18 12:02:01,174 INFO L226 Difference]: Without dead ends: 1371 [2020-08-18 12:02:01,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 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 12:02:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-08-18 12:02:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1257. [2020-08-18 12:02:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-08-18 12:02:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1557 transitions. [2020-08-18 12:02:01,508 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1557 transitions. Word has length 133 [2020-08-18 12:02:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:01,508 INFO L479 AbstractCegarLoop]: Abstraction has 1257 states and 1557 transitions. [2020-08-18 12:02:01,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:02:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1557 transitions. [2020-08-18 12:02:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 12:02:01,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:01,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:01,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:02:01,514 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-18 12:02:01,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:01,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959178222] [2020-08-18 12:02:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,821 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:02:01,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:02:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:02:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:02:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:02:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:02:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:02:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 12:02:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 12:02:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 12:02:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:02,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 12:02:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 12:02:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 12:02:02,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959178222] [2020-08-18 12:02:02,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:02,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:02:02,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103319074] [2020-08-18 12:02:02,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:02:02,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:02,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:02:02,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:02:02,040 INFO L87 Difference]: Start difference. First operand 1257 states and 1557 transitions. Second operand 13 states. [2020-08-18 12:02:02,586 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:02:03,334 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:05,792 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:06,128 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:06,396 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:06,658 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:06,934 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:07,199 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:07,458 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:07,719 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:08,013 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:08,313 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:09,308 INFO L93 Difference]: Finished difference Result 3807 states and 4924 transitions. [2020-08-18 12:02:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 12:02:09,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-18 12:02:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:09,323 INFO L225 Difference]: With dead ends: 3807 [2020-08-18 12:02:09,324 INFO L226 Difference]: Without dead ends: 2574 [2020-08-18 12:02:09,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 12:02:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2020-08-18 12:02:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2369. [2020-08-18 12:02:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2369 states. [2020-08-18 12:02:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 2892 transitions. [2020-08-18 12:02:09,757 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 2892 transitions. Word has length 137 [2020-08-18 12:02:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:09,757 INFO L479 AbstractCegarLoop]: Abstraction has 2369 states and 2892 transitions. [2020-08-18 12:02:09,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:02:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 2892 transitions. [2020-08-18 12:02:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 12:02:09,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:09,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:09,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:02:09,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash -892794252, now seen corresponding path program 1 times [2020-08-18 12:02:09,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:09,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886358278] [2020-08-18 12:02:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,113 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:02:10,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:02:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:02:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:02:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 12:02:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:02:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:02:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 12:02:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 12:02:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 12:02:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 12:02:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 12:02:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 12:02:10,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886358278] [2020-08-18 12:02:10,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:10,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:02:10,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337069143] [2020-08-18 12:02:10,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:02:10,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:02:10,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:02:10,396 INFO L87 Difference]: Start difference. First operand 2369 states and 2892 transitions. Second operand 13 states. [2020-08-18 12:02:11,328 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:11,612 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:11,827 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:12,757 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:13,086 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:13,346 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:14,917 INFO L93 Difference]: Finished difference Result 4569 states and 5911 transitions. [2020-08-18 12:02:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:02:14,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-18 12:02:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:14,930 INFO L225 Difference]: With dead ends: 4569 [2020-08-18 12:02:14,931 INFO L226 Difference]: Without dead ends: 2224 [2020-08-18 12:02:14,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:02:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2020-08-18 12:02:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1917. [2020-08-18 12:02:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-08-18 12:02:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2288 transitions. [2020-08-18 12:02:15,329 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2288 transitions. Word has length 137 [2020-08-18 12:02:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:15,330 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2288 transitions. [2020-08-18 12:02:15,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:02:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2288 transitions. [2020-08-18 12:02:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-18 12:02:15,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:15,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:15,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:02:15,336 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:15,336 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-18 12:02:15,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:15,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419478634] [2020-08-18 12:02:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,656 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:02:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:02:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:02:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:02:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:02:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 12:02:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:02:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:02:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 12:02:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 12:02:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 12:02:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 12:02:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 12:02:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 12:02:15,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419478634] [2020-08-18 12:02:15,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:15,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:02:15,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344151635] [2020-08-18 12:02:15,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:02:15,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:15,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:02:15,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:02:15,876 INFO L87 Difference]: Start difference. First operand 1917 states and 2288 transitions. Second operand 11 states. [2020-08-18 12:02:16,387 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:02:18,718 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:19,004 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:19,258 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:19,640 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:02:19,902 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:20,324 INFO L93 Difference]: Finished difference Result 2255 states and 2883 transitions. [2020-08-18 12:02:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 12:02:20,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-18 12:02:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:20,337 INFO L225 Difference]: With dead ends: 2255 [2020-08-18 12:02:20,337 INFO L226 Difference]: Without dead ends: 2252 [2020-08-18 12:02:20,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:02:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2020-08-18 12:02:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1917. [2020-08-18 12:02:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-08-18 12:02:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2278 transitions. [2020-08-18 12:02:20,698 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2278 transitions. Word has length 141 [2020-08-18 12:02:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:20,698 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2278 transitions. [2020-08-18 12:02:20,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:02:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2278 transitions. [2020-08-18 12:02:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 12:02:20,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:20,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:20,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:02:20,705 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-18 12:02:20,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:20,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821549705] [2020-08-18 12:02:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,041 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 12:02:21,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:02:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:02:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 12:02:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:02:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:02:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:02:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 12:02:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 12:02:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 12:02:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:02:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 12:02:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 12:02:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 12:02:21,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821549705] [2020-08-18 12:02:21,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:21,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:02:21,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598389775] [2020-08-18 12:02:21,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:02:21,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:02:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:02:21,286 INFO L87 Difference]: Start difference. First operand 1917 states and 2278 transitions. Second operand 12 states. [2020-08-18 12:02:21,826 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 12:02:22,807 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 12:02:23,172 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:02:23,441 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:02:23,695 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:02:24,091 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:24,368 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 12:02:25,360 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 12:02:25,646 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 12:02:25,907 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 190