/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:13:15,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:13:15,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:13:15,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:13:15,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:13:15,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:13:15,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:13:15,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:13:15,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:13:15,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:13:15,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:13:15,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:13:15,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:13:15,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:13:15,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:13:15,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:13:15,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:13:15,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:13:15,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:13:15,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:13:15,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:13:15,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:13:15,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:13:15,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:13:15,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:13:15,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:13:15,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:13:15,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:13:15,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:13:15,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:13:15,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:13:15,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:13:15,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:13:15,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:13:15,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:13:15,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:13:15,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:13:15,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:13:15,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:13:15,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:13:15,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:13:15,592 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 [2020-08-21 17:13:15,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:13:15,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:13:15,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:13:15,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:13:15,617 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:13:15,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:13:15,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:13:15,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:13:15,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:13:15,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:13:15,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:13:15,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:13:15,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:13:15,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:13:15,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:13:15,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:13:15,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:13:15,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:13:15,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:13:15,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:13:15,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:13:15,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:13:15,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:13:15,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:13:15,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:13:15,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:13:15,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:13:15,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:13:15,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:13:15,622 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:13:15,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:13:15,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:13:15,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:13:15,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:13:15,951 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:13:15,952 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c [2020-08-21 17:13:16,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02719113e/90483fcbba8b4ff6942e5d765fe759d9/FLAGadb4264d0 [2020-08-21 17:13:16,565 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:13:16,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product51.cil.c [2020-08-21 17:13:16,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02719113e/90483fcbba8b4ff6942e5d765fe759d9/FLAGadb4264d0 [2020-08-21 17:13:16,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02719113e/90483fcbba8b4ff6942e5d765fe759d9 [2020-08-21 17:13:16,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:13:16,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:13:16,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:13:16,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:13:16,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:13:16,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:13:16" (1/1) ... [2020-08-21 17:13:16,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdfc9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:16, skipping insertion in model container [2020-08-21 17:13:16,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:13:16" (1/1) ... [2020-08-21 17:13:16,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:13:16,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:13:17,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:13:17,431 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:13:17,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:13:17,554 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:13:17,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17 WrapperNode [2020-08-21 17:13:17,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:13:17,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:13:17,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:13:17,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:13:17,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (1/1) ... [2020-08-21 17:13:17,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:13:17,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:13:17,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:13:17,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:13:17,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (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 [2020-08-21 17:13:17,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:13:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:13:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:13:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 17:13:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:13:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:13:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 17:13:17,729 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:13:17,730 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:13:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:13:17,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:13:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:13:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:13:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:13:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:13:17,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:13:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:13:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:13:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 17:13:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:13:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:13:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:13:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:13:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:13:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:13:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:13:18,755 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:13:18,755 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:13:18,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:13:18 BoogieIcfgContainer [2020-08-21 17:13:18,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:13:18,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:13:18,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:13:18,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:13:18,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:13:16" (1/3) ... [2020-08-21 17:13:18,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d984ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:13:18, skipping insertion in model container [2020-08-21 17:13:18,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:13:17" (2/3) ... [2020-08-21 17:13:18,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d984ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:13:18, skipping insertion in model container [2020-08-21 17:13:18,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:13:18" (3/3) ... [2020-08-21 17:13:18,768 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product51.cil.c [2020-08-21 17:13:18,779 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:13:18,787 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:13:18,800 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:13:18,826 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:13:18,826 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:13:18,826 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:13:18,826 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:13:18,827 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:13:18,827 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:13:18,827 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:13:18,827 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:13:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-08-21 17:13:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:13:18,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:18,862 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] [2020-08-21 17:13:18,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1091923628, now seen corresponding path program 1 times [2020-08-21 17:13:18,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:18,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857878735] [2020-08-21 17:13:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,561 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:13:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:13:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:13:19,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857878735] [2020-08-21 17:13:19,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:13:19,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:13:19,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052994240] [2020-08-21 17:13:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:13:19,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:13:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:13:19,673 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-08-21 17:13:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:20,827 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-21 17:13:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:13:20,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:13:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:20,844 INFO L225 Difference]: With dead ends: 311 [2020-08-21 17:13:20,844 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 17:13:20,849 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 [2020-08-21 17:13:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 17:13:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-21 17:13:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 17:13:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-21 17:13:20,962 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-21 17:13:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:20,963 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-21 17:13:20,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:13:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-21 17:13:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:13:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:20,973 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] [2020-08-21 17:13:20,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:13:20,974 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash 644500822, now seen corresponding path program 1 times [2020-08-21 17:13:20,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:20,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037433478] [2020-08-21 17:13:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,384 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:21,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:13:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:13:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:13:21,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037433478] [2020-08-21 17:13:21,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:13:21,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:13:21,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549697042] [2020-08-21 17:13:21,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:13:21,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:13:21,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:13:21,431 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-21 17:13:21,842 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:22,729 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-21 17:13:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:13:22,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 17:13:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:22,733 INFO L225 Difference]: With dead ends: 238 [2020-08-21 17:13:22,733 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 17:13:22,735 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 [2020-08-21 17:13:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 17:13:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-21 17:13:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 17:13:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-21 17:13:22,775 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-21 17:13:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:22,776 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-21 17:13:22,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:13:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-21 17:13:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:13:22,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:22,778 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] [2020-08-21 17:13:22,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:13:22,778 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash -350015351, now seen corresponding path program 1 times [2020-08-21 17:13:22,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:22,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455360980] [2020-08-21 17:13:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,128 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:23,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:13:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:13:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:13:23,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455360980] [2020-08-21 17:13:23,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:13:23,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:13:23,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774813732] [2020-08-21 17:13:23,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:13:23,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:13:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:13:23,252 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-21 17:13:23,600 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:23,923 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:24,196 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:24,423 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:25,167 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:26,931 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-21 17:13:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:13:26,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 17:13:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:26,945 INFO L225 Difference]: With dead ends: 427 [2020-08-21 17:13:26,945 INFO L226 Difference]: Without dead ends: 326 [2020-08-21 17:13:26,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:13:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-21 17:13:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-21 17:13:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-21 17:13:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-21 17:13:27,037 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-21 17:13:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:27,037 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-21 17:13:27,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:13:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-21 17:13:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:13:27,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:27,040 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] [2020-08-21 17:13:27,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:13:27,041 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash -103520613, now seen corresponding path program 1 times [2020-08-21 17:13:27,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:27,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803131034] [2020-08-21 17:13:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,362 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:13:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:13:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:13:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:13:27,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803131034] [2020-08-21 17:13:27,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:13:27,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:13:27,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762749312] [2020-08-21 17:13:27,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:13:27,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:13:27,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:13:27,519 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 12 states. [2020-08-21 17:13:27,930 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:28,255 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:28,504 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:28,737 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:29,246 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:30,151 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:30,527 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:13:30,917 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:13:31,176 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:31,447 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:31,823 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:13:32,174 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:13:32,567 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:34,239 INFO L93 Difference]: Finished difference Result 1081 states and 1492 transitions. [2020-08-21 17:13:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:13:34,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 17:13:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:34,249 INFO L225 Difference]: With dead ends: 1081 [2020-08-21 17:13:34,249 INFO L226 Difference]: Without dead ends: 837 [2020-08-21 17:13:34,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:13:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-08-21 17:13:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 744. [2020-08-21 17:13:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-21 17:13:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 950 transitions. [2020-08-21 17:13:34,429 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 950 transitions. Word has length 57 [2020-08-21 17:13:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:34,429 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 950 transitions. [2020-08-21 17:13:34,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:13:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 950 transitions. [2020-08-21 17:13:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:13:34,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:34,433 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] [2020-08-21 17:13:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:13:34,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1065334495, now seen corresponding path program 1 times [2020-08-21 17:13:34,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:34,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355499417] [2020-08-21 17:13:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,704 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:13:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:13:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:13:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:13:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:13:34,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355499417] [2020-08-21 17:13:34,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:13:34,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:13:34,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29981066] [2020-08-21 17:13:34,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:13:34,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:13:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:13:34,819 INFO L87 Difference]: Start difference. First operand 744 states and 950 transitions. Second operand 6 states. [2020-08-21 17:13:35,181 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:36,951 INFO L93 Difference]: Finished difference Result 1779 states and 2437 transitions. [2020-08-21 17:13:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:13:36,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 17:13:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:36,961 INFO L225 Difference]: With dead ends: 1779 [2020-08-21 17:13:36,962 INFO L226 Difference]: Without dead ends: 1059 [2020-08-21 17:13:36,966 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 [2020-08-21 17:13:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-08-21 17:13:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 972. [2020-08-21 17:13:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2020-08-21 17:13:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1232 transitions. [2020-08-21 17:13:37,175 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1232 transitions. Word has length 61 [2020-08-21 17:13:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:37,175 INFO L479 AbstractCegarLoop]: Abstraction has 972 states and 1232 transitions. [2020-08-21 17:13:37,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:13:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1232 transitions. [2020-08-21 17:13:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 17:13:37,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:37,179 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] [2020-08-21 17:13:37,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:13:37,180 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash 380759586, now seen corresponding path program 1 times [2020-08-21 17:13:37,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:37,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110138122] [2020-08-21 17:13:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,556 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:13:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:13:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 17:13:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 17:13:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 17:13:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 17:13:37,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110138122] [2020-08-21 17:13:37,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:37,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:13:37,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505670388] [2020-08-21 17:13:37,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:13:37,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:13:37,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:13:37,681 INFO L87 Difference]: Start difference. First operand 972 states and 1232 transitions. Second operand 10 states. [2020-08-21 17:13:38,240 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 17:13:38,771 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:40,499 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:42,272 INFO L93 Difference]: Finished difference Result 1881 states and 2481 transitions. [2020-08-21 17:13:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:13:42,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-21 17:13:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:42,281 INFO L225 Difference]: With dead ends: 1881 [2020-08-21 17:13:42,282 INFO L226 Difference]: Without dead ends: 1176 [2020-08-21 17:13:42,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:13:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2020-08-21 17:13:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2020-08-21 17:13:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-08-21 17:13:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1343 transitions. [2020-08-21 17:13:42,489 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1343 transitions. Word has length 88 [2020-08-21 17:13:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:42,489 INFO L479 AbstractCegarLoop]: Abstraction has 1079 states and 1343 transitions. [2020-08-21 17:13:42,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1343 transitions. [2020-08-21 17:13:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 17:13:42,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:42,494 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] [2020-08-21 17:13:42,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:13:42,495 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash 605263964, now seen corresponding path program 1 times [2020-08-21 17:13:42,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:42,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112446566] [2020-08-21 17:13:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,751 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:42,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:13:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 17:13:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 17:13:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:13:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 17:13:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-21 17:13:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:13:42,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112446566] [2020-08-21 17:13:42,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:42,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:13:42,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319014835] [2020-08-21 17:13:42,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:13:42,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:13:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:13:42,967 INFO L87 Difference]: Start difference. First operand 1079 states and 1343 transitions. Second operand 10 states. [2020-08-21 17:13:44,114 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:44,387 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:13:44,642 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:44,883 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:46,033 INFO L93 Difference]: Finished difference Result 2275 states and 2959 transitions. [2020-08-21 17:13:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:13:46,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2020-08-21 17:13:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:46,043 INFO L225 Difference]: With dead ends: 2275 [2020-08-21 17:13:46,043 INFO L226 Difference]: Without dead ends: 1220 [2020-08-21 17:13:46,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:13:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-21 17:13:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1109. [2020-08-21 17:13:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-21 17:13:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1377 transitions. [2020-08-21 17:13:46,227 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1377 transitions. Word has length 128 [2020-08-21 17:13:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:46,228 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1377 transitions. [2020-08-21 17:13:46,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1377 transitions. [2020-08-21 17:13:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 17:13:46,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:46,232 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] [2020-08-21 17:13:46,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:13:46,232 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2030061671, now seen corresponding path program 1 times [2020-08-21 17:13:46,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:46,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607264069] [2020-08-21 17:13:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,483 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:46,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:13:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 17:13:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 17:13:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:13:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:13:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 17:13:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 17:13:46,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607264069] [2020-08-21 17:13:46,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:46,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:13:46,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275847943] [2020-08-21 17:13:46,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:13:46,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:13:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:13:46,625 INFO L87 Difference]: Start difference. First operand 1109 states and 1377 transitions. Second operand 10 states. [2020-08-21 17:13:48,535 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:48,774 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:49,019 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:49,247 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:49,698 INFO L93 Difference]: Finished difference Result 2059 states and 2638 transitions. [2020-08-21 17:13:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:13:49,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-21 17:13:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:49,707 INFO L225 Difference]: With dead ends: 2059 [2020-08-21 17:13:49,707 INFO L226 Difference]: Without dead ends: 1256 [2020-08-21 17:13:49,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:13:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-08-21 17:13:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1145. [2020-08-21 17:13:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2020-08-21 17:13:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1425 transitions. [2020-08-21 17:13:49,923 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1425 transitions. Word has length 132 [2020-08-21 17:13:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:49,923 INFO L479 AbstractCegarLoop]: Abstraction has 1145 states and 1425 transitions. [2020-08-21 17:13:49,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1425 transitions. [2020-08-21 17:13:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 17:13:49,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:49,935 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] [2020-08-21 17:13:49,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:13:49,936 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash 336030620, now seen corresponding path program 1 times [2020-08-21 17:13:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:49,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761850493] [2020-08-21 17:13:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,300 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:13:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 17:13:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 17:13:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:13:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 17:13:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-21 17:13:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:13:50,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761850493] [2020-08-21 17:13:50,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:50,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:13:50,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975626120] [2020-08-21 17:13:50,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:13:50,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:50,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:13:50,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:13:50,569 INFO L87 Difference]: Start difference. First operand 1145 states and 1425 transitions. Second operand 12 states. [2020-08-21 17:13:51,192 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:51,447 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:51,662 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:52,302 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:52,555 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:52,789 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:53,890 INFO L93 Difference]: Finished difference Result 2153 states and 2757 transitions. [2020-08-21 17:13:53,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:13:53,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 128 [2020-08-21 17:13:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:53,897 INFO L225 Difference]: With dead ends: 2153 [2020-08-21 17:13:53,897 INFO L226 Difference]: Without dead ends: 1032 [2020-08-21 17:13:53,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:13:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2020-08-21 17:13:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 976. [2020-08-21 17:13:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-21 17:13:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1182 transitions. [2020-08-21 17:13:54,101 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1182 transitions. Word has length 128 [2020-08-21 17:13:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:54,102 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1182 transitions. [2020-08-21 17:13:54,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:13:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1182 transitions. [2020-08-21 17:13:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 17:13:54,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:54,107 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] [2020-08-21 17:13:54,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:13:54,108 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1755432535, now seen corresponding path program 1 times [2020-08-21 17:13:54,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:54,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137732029] [2020-08-21 17:13:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,408 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:13:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 17:13:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 17:13:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:13:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:13:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 17:13:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 17:13:54,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137732029] [2020-08-21 17:13:54,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:54,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:13:54,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442261207] [2020-08-21 17:13:54,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:13:54,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:13:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:13:54,546 INFO L87 Difference]: Start difference. First operand 976 states and 1182 transitions. Second operand 10 states. [2020-08-21 17:13:55,069 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:56,745 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:57,007 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:57,250 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:57,489 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:57,771 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:58,173 INFO L93 Difference]: Finished difference Result 1053 states and 1300 transitions. [2020-08-21 17:13:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:13:58,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-21 17:13:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:58,180 INFO L225 Difference]: With dead ends: 1053 [2020-08-21 17:13:58,180 INFO L226 Difference]: Without dead ends: 1050 [2020-08-21 17:13:58,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:13:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-08-21 17:13:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 976. [2020-08-21 17:13:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-21 17:13:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1177 transitions. [2020-08-21 17:13:58,354 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1177 transitions. Word has length 132 [2020-08-21 17:13:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:58,355 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1177 transitions. [2020-08-21 17:13:58,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1177 transitions. [2020-08-21 17:13:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 17:13:58,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:58,358 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, 1, 1, 1] [2020-08-21 17:13:58,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:13:58,359 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1244866615, now seen corresponding path program 1 times [2020-08-21 17:13:58,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:58,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470752871] [2020-08-21 17:13:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,683 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:58,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:13:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 17:13:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 17:13:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:13:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 17:13:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-21 17:13:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 17:13:58,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470752871] [2020-08-21 17:13:58,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:58,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:13:58,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654724236] [2020-08-21 17:13:58,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:13:58,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:58,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:13:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:13:58,893 INFO L87 Difference]: Start difference. First operand 976 states and 1177 transitions. Second operand 12 states. [2020-08-21 17:13:59,783 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:14:00,654 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:14:00,955 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:14:01,240 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:14:01,479 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:14:01,722 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:14:02,041 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:14:02,804 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:14:03,082 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:14:03,334 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:14:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:14:05,378 INFO L93 Difference]: Finished difference Result 2450 states and 3139 transitions. [2020-08-21 17:14:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 17:14:05,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-21 17:14:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:14:05,391 INFO L225 Difference]: With dead ends: 2450 [2020-08-21 17:14:05,391 INFO L226 Difference]: Without dead ends: 1653 [2020-08-21 17:14:05,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-08-21 17:14:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2020-08-21 17:14:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1471. [2020-08-21 17:14:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-08-21 17:14:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1804 transitions. [2020-08-21 17:14:05,712 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1804 transitions. Word has length 136 [2020-08-21 17:14:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:14:05,714 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 1804 transitions. [2020-08-21 17:14:05,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:14:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1804 transitions. [2020-08-21 17:14:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-21 17:14:05,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:14:05,722 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-21 17:14:05,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:14:05,723 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:14:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:14:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1692744000, now seen corresponding path program 2 times [2020-08-21 17:14:05,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:14:05,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373107929] [2020-08-21 17:14:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:14:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,064 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:14:06,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:14:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:14:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:14:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:14:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:14:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:14:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:14:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:14:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:14:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 17:14:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:14:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:14:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:14:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 17:14:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-21 17:14:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:14:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:14:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:14:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-21 17:14:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-21 17:14:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:14:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-21 17:14:06,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373107929] [2020-08-21 17:14:06,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:14:06,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:14:06,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081049542] [2020-08-21 17:14:06,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:14:06,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:14:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:14:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:14:06,447 INFO L87 Difference]: Start difference. First operand 1471 states and 1804 transitions. Second operand 13 states. [2020-08-21 17:14:08,029 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:14:08,306 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:14:10,259 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 17:14:10,533 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:14:10,798 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:14:11,250 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2020-08-21 17:14:12,263 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-21 17:14:12,524 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:14:12,787 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:14:14,167 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 189 [2020-08-21 17:14:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:14:14,842 INFO L93 Difference]: Finished difference Result 3719 states and 4726 transitions. [2020-08-21 17:14:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 17:14:14,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 189 [2020-08-21 17:14:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:14:14,857 INFO L225 Difference]: With dead ends: 3719 [2020-08-21 17:14:14,857 INFO L226 Difference]: Without dead ends: 2400 [2020-08-21 17:14:14,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 17:14:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-08-21 17:14:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2173. [2020-08-21 17:14:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2173 states. [2020-08-21 17:14:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2646 transitions. [2020-08-21 17:14:15,308 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2646 transitions. Word has length 189 [2020-08-21 17:14:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:14:15,308 INFO L479 AbstractCegarLoop]: Abstraction has 2173 states and 2646 transitions. [2020-08-21 17:14:15,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:14:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2646 transitions. [2020-08-21 17:14:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-21 17:14:15,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:14:15,316 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-21 17:14:15,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:14:15,316 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:14:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:14:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 934692232, now seen corresponding path program 1 times [2020-08-21 17:14:15,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:14:15,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030739633] [2020-08-21 17:14:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:14:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat