/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:39:47,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:39:47,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:39:47,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:39:47,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:39:47,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:39:47,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:39:47,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:39:47,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:39:47,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:39:47,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:39:47,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:39:47,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:39:47,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:39:47,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:39:47,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:39:47,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:39:47,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:39:47,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:39:47,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:39:47,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:39:47,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:39:47,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:39:47,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:39:47,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:39:47,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:39:47,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:39:47,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:39:47,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:39:47,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:39:47,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:39:47,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:39:47,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:39:47,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:39:47,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:39:47,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:39:47,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:39:47,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:39:47,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:39:47,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:39:47,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:39:47,557 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 23:39:47,580 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:39:47,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:39:47,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:39:47,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:39:47,582 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:39:47,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:39:47,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:39:47,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:39:47,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:39:47,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:39:47,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:39:47,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:39:47,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:39:47,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:39:47,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:39:47,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:39:47,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:39:47,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:39:47,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:39:47,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:39:47,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:39:47,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:39:47,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:39:47,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:39:47,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:39:47,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:39:47,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:39:47,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:39:47,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:39:47,587 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:39:47,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:39:47,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:39:47,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:39:47,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:39:47,910 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:39:47,911 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-21 23:39:47,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d2164628/5726999d783347a1b20a34cd3cf08b70/FLAG66fc8acfa [2020-08-21 23:39:48,473 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:39:48,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-21 23:39:48,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d2164628/5726999d783347a1b20a34cd3cf08b70/FLAG66fc8acfa [2020-08-21 23:39:48,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d2164628/5726999d783347a1b20a34cd3cf08b70 [2020-08-21 23:39:48,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:39:48,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:39:48,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:39:48,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:39:48,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:39:48,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:39:48" (1/1) ... [2020-08-21 23:39:48,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d2a1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:48, skipping insertion in model container [2020-08-21 23:39:48,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:39:48" (1/1) ... [2020-08-21 23:39:48,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:39:48,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:39:49,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:39:49,440 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:39:49,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:39:49,577 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:39:49,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49 WrapperNode [2020-08-21 23:39:49,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:39:49,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:39:49,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:39:49,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:39:49,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (1/1) ... [2020-08-21 23:39:49,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:39:49,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:39:49,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:39:49,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:39:49,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (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 23:39:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:39:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:39:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 23:39:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 23:39:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 23:39:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 23:39:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 23:39:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 23:39:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 23:39:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 23:39:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 23:39:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 23:39:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 23:39:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 23:39:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 23:39:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 23:39:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:39:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 23:39:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 23:39:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 23:39:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 23:39:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 23:39:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 23:39:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 23:39:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 23:39:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 23:39:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 23:39:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 23:39:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 23:39:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 23:39:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:39:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:39:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 23:39:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 23:39:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 23:39:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 23:39:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 23:39:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 23:39:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 23:39:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 23:39:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 23:39:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 23:39:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 23:39:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 23:39:49,775 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 23:39:49,776 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 23:39:49,776 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 23:39:49,776 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 23:39:49,776 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 23:39:49,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 23:39:49,777 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 23:39:49,778 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 23:39:49,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:39:49,779 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 23:39:49,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 23:39:49,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:39:49,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 23:39:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 23:39:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 23:39:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 23:39:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 23:39:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:39:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 23:39:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:39:50,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:39:50,854 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 23:39:50,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:39:50 BoogieIcfgContainer [2020-08-21 23:39:50,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:39:50,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:39:50,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:39:50,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:39:50,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:39:48" (1/3) ... [2020-08-21 23:39:50,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1538ba6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:39:50, skipping insertion in model container [2020-08-21 23:39:50,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:39:49" (2/3) ... [2020-08-21 23:39:50,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1538ba6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:39:50, skipping insertion in model container [2020-08-21 23:39:50,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:39:50" (3/3) ... [2020-08-21 23:39:50,873 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product40.cil.c [2020-08-21 23:39:50,884 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:39:50,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:39:50,908 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:39:50,934 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:39:50,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:39:50,935 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:39:50,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:39:50,935 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:39:50,935 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:39:50,935 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:39:50,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:39:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-08-21 23:39:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 23:39:50,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:39:50,969 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 23:39:50,970 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:39:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:39:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -656044244, now seen corresponding path program 1 times [2020-08-21 23:39:50,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:39:50,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854804266] [2020-08-21 23:39:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:39:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,656 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:39:51,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:39:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:39:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:39:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:39:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:39:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:39:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 23:39:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:51,758 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 23:39:51,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854804266] [2020-08-21 23:39:51,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:39:51,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:39:51,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156389696] [2020-08-21 23:39:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:39:51,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:39:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:39:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:39:51,786 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 3 states. [2020-08-21 23:39:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:39:53,010 INFO L93 Difference]: Finished difference Result 316 states and 411 transitions. [2020-08-21 23:39:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:39:53,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 23:39:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:39:53,028 INFO L225 Difference]: With dead ends: 316 [2020-08-21 23:39:53,028 INFO L226 Difference]: Without dead ends: 171 [2020-08-21 23:39:53,033 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 23:39:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-21 23:39:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2020-08-21 23:39:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 23:39:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-08-21 23:39:53,136 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 46 [2020-08-21 23:39:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:39:53,136 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-08-21 23:39:53,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:39:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-08-21 23:39:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 23:39:53,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:39:53,141 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 23:39:53,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:39:53,142 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:39:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:39:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash 679222766, now seen corresponding path program 1 times [2020-08-21 23:39:53,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:39:53,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118765742] [2020-08-21 23:39:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:39:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,476 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:39:53,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:39:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:39:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:39:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:39:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:39:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:39:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 23:39:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:53,520 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 23:39:53,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118765742] [2020-08-21 23:39:53,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:39:53,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:39:53,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753240807] [2020-08-21 23:39:53,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:39:53,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:39:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:39:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:39:53,523 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand 4 states. [2020-08-21 23:39:53,920 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:39:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:39:54,842 INFO L93 Difference]: Finished difference Result 239 states and 290 transitions. [2020-08-21 23:39:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:39:54,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 23:39:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:39:54,846 INFO L225 Difference]: With dead ends: 239 [2020-08-21 23:39:54,846 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 23:39:54,848 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 23:39:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 23:39:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2020-08-21 23:39:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 23:39:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-08-21 23:39:54,889 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 47 [2020-08-21 23:39:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:39:54,890 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-08-21 23:39:54,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:39:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-08-21 23:39:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 23:39:54,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:39:54,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:39:54,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:39:54,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:39:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:39:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash 496169114, now seen corresponding path program 1 times [2020-08-21 23:39:54,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:39:54,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603582986] [2020-08-21 23:39:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:39:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,204 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:39:55,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:39:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:39:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:39:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:39:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:39:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 23:39:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 23:39:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:55,275 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 23:39:55,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603582986] [2020-08-21 23:39:55,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:39:55,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:39:55,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448098411] [2020-08-21 23:39:55,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:39:55,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:39:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:39:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:39:55,278 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 8 states. [2020-08-21 23:39:55,607 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:39:55,886 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:39:56,113 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:39:56,379 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:39:57,098 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:39:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:39:58,922 INFO L93 Difference]: Finished difference Result 436 states and 538 transitions. [2020-08-21 23:39:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:39:58,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 23:39:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:39:58,930 INFO L225 Difference]: With dead ends: 436 [2020-08-21 23:39:58,930 INFO L226 Difference]: Without dead ends: 333 [2020-08-21 23:39:58,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:39:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-08-21 23:39:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 268. [2020-08-21 23:39:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-21 23:39:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 322 transitions. [2020-08-21 23:39:59,070 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 322 transitions. Word has length 52 [2020-08-21 23:39:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:39:59,072 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 322 transitions. [2020-08-21 23:39:59,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:39:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 322 transitions. [2020-08-21 23:39:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:39:59,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:39:59,082 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 23:39:59,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:39:59,083 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:39:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:39:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash 987448314, now seen corresponding path program 1 times [2020-08-21 23:39:59,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:39:59,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42490268] [2020-08-21 23:39:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:39:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,435 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:39:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:39:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:39:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:39:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:39:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:39:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:39:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 23:39:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:39:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:39:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:39:59,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42490268] [2020-08-21 23:39:59,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:39:59,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 23:39:59,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401911090] [2020-08-21 23:39:59,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:39:59,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:39:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:39:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:39:59,567 INFO L87 Difference]: Start difference. First operand 268 states and 322 transitions. Second operand 12 states. [2020-08-21 23:39:59,968 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:00,281 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:00,560 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:00,789 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:01,335 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:02,115 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:02,492 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:02,803 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:03,083 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:03,411 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:03,875 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:04,161 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:04,406 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:06,436 INFO L93 Difference]: Finished difference Result 1085 states and 1492 transitions. [2020-08-21 23:40:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:40:06,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 23:40:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:06,449 INFO L225 Difference]: With dead ends: 1085 [2020-08-21 23:40:06,449 INFO L226 Difference]: Without dead ends: 841 [2020-08-21 23:40:06,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 23:40:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2020-08-21 23:40:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 744. [2020-08-21 23:40:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-21 23:40:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 944 transitions. [2020-08-21 23:40:06,631 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 944 transitions. Word has length 57 [2020-08-21 23:40:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:06,632 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 944 transitions. [2020-08-21 23:40:06,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:40:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 944 transitions. [2020-08-21 23:40:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 23:40:06,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:06,635 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 23:40:06,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:40:06,636 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:06,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1158385600, now seen corresponding path program 1 times [2020-08-21 23:40:06,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:06,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249453406] [2020-08-21 23:40:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,901 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:06,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:40:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:40:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 23:40:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:06,998 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 23:40:06,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249453406] [2020-08-21 23:40:06,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:06,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:40:07,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144524837] [2020-08-21 23:40:07,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:40:07,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:40:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:40:07,005 INFO L87 Difference]: Start difference. First operand 744 states and 944 transitions. Second operand 6 states. [2020-08-21 23:40:07,284 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:08,749 INFO L93 Difference]: Finished difference Result 1799 states and 2451 transitions. [2020-08-21 23:40:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:40:08,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 23:40:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:08,759 INFO L225 Difference]: With dead ends: 1799 [2020-08-21 23:40:08,759 INFO L226 Difference]: Without dead ends: 1079 [2020-08-21 23:40:08,767 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 23:40:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-08-21 23:40:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 988. [2020-08-21 23:40:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-08-21 23:40:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1244 transitions. [2020-08-21 23:40:09,025 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1244 transitions. Word has length 61 [2020-08-21 23:40:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:09,025 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1244 transitions. [2020-08-21 23:40:09,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:40:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1244 transitions. [2020-08-21 23:40:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 23:40:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:09,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:09,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:40:09,029 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -623744306, now seen corresponding path program 1 times [2020-08-21 23:40:09,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:09,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240293109] [2020-08-21 23:40:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,322 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:40:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:40:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:40:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:40:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 23:40:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 23:40:09,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240293109] [2020-08-21 23:40:09,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:09,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:40:09,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311495768] [2020-08-21 23:40:09,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:40:09,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:09,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:40:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:40:09,517 INFO L87 Difference]: Start difference. First operand 988 states and 1244 transitions. Second operand 10 states. [2020-08-21 23:40:10,096 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 23:40:10,687 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:12,494 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:14,246 INFO L93 Difference]: Finished difference Result 1921 states and 2525 transitions. [2020-08-21 23:40:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 23:40:14,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 23:40:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:14,255 INFO L225 Difference]: With dead ends: 1921 [2020-08-21 23:40:14,255 INFO L226 Difference]: Without dead ends: 1208 [2020-08-21 23:40:14,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:40:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-08-21 23:40:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1095. [2020-08-21 23:40:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-21 23:40:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1355 transitions. [2020-08-21 23:40:14,433 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1355 transitions. Word has length 89 [2020-08-21 23:40:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:14,434 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1355 transitions. [2020-08-21 23:40:14,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:40:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1355 transitions. [2020-08-21 23:40:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 23:40:14,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:14,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:14,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:40:14,439 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:14,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1382968030, now seen corresponding path program 1 times [2020-08-21 23:40:14,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:14,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317879616] [2020-08-21 23:40:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,760 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:14,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:40:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 23:40:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 23:40:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:40:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 23:40:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 23:40:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 23:40:14,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317879616] [2020-08-21 23:40:14,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:14,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:40:14,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151925279] [2020-08-21 23:40:14,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:40:14,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:40:14,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:40:14,992 INFO L87 Difference]: Start difference. First operand 1095 states and 1355 transitions. Second operand 12 states. [2020-08-21 23:40:15,649 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:15,910 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:16,134 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:16,921 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:17,202 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:17,466 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:18,495 INFO L93 Difference]: Finished difference Result 2280 states and 2962 transitions. [2020-08-21 23:40:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:40:18,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-08-21 23:40:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:18,503 INFO L225 Difference]: With dead ends: 2280 [2020-08-21 23:40:18,504 INFO L226 Difference]: Without dead ends: 1209 [2020-08-21 23:40:18,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 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 23:40:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-08-21 23:40:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1095. [2020-08-21 23:40:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-21 23:40:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1351 transitions. [2020-08-21 23:40:18,761 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1351 transitions. Word has length 132 [2020-08-21 23:40:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:18,762 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1351 transitions. [2020-08-21 23:40:18,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:40:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1351 transitions. [2020-08-21 23:40:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 23:40:18,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:18,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:18,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:40:18,766 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1345241316, now seen corresponding path program 1 times [2020-08-21 23:40:18,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:18,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476741273] [2020-08-21 23:40:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,044 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:19,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:40:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 23:40:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 23:40:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:40:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 23:40:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 23:40:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 23:40:19,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476741273] [2020-08-21 23:40:19,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:19,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:40:19,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309375461] [2020-08-21 23:40:19,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:40:19,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:40:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:40:19,288 INFO L87 Difference]: Start difference. First operand 1095 states and 1351 transitions. Second operand 10 states. [2020-08-21 23:40:20,514 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:20,754 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 23:40:21,010 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:21,240 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:22,243 INFO L93 Difference]: Finished difference Result 2085 states and 2647 transitions. [2020-08-21 23:40:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:40:22,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-21 23:40:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:22,250 INFO L225 Difference]: With dead ends: 2085 [2020-08-21 23:40:22,250 INFO L226 Difference]: Without dead ends: 1014 [2020-08-21 23:40:22,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 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 23:40:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-08-21 23:40:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 956. [2020-08-21 23:40:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-08-21 23:40:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1156 transitions. [2020-08-21 23:40:22,442 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1156 transitions. Word has length 132 [2020-08-21 23:40:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:22,443 INFO L479 AbstractCegarLoop]: Abstraction has 956 states and 1156 transitions. [2020-08-21 23:40:22,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:40:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1156 transitions. [2020-08-21 23:40:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 23:40:22,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:22,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:22,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:40:22,448 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash -855657151, now seen corresponding path program 1 times [2020-08-21 23:40:22,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:22,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537320441] [2020-08-21 23:40:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,741 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:40:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:40:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 23:40:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:40:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 23:40:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 23:40:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 23:40:22,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537320441] [2020-08-21 23:40:22,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:22,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:40:22,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734660816] [2020-08-21 23:40:22,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:40:22,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:40:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:40:22,988 INFO L87 Difference]: Start difference. First operand 956 states and 1156 transitions. Second operand 13 states. [2020-08-21 23:40:23,450 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:24,177 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:26,351 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:26,625 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:26,876 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:27,149 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:27,404 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:27,664 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:27,920 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:28,165 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:28,435 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:28,685 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:29,408 INFO L93 Difference]: Finished difference Result 2764 states and 3470 transitions. [2020-08-21 23:40:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 23:40:29,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2020-08-21 23:40:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:29,420 INFO L225 Difference]: With dead ends: 2764 [2020-08-21 23:40:29,420 INFO L226 Difference]: Without dead ends: 1832 [2020-08-21 23:40:29,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 23:40:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-08-21 23:40:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1727. [2020-08-21 23:40:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-21 23:40:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2059 transitions. [2020-08-21 23:40:29,767 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2059 transitions. Word has length 132 [2020-08-21 23:40:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:29,767 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2059 transitions. [2020-08-21 23:40:29,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:40:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2059 transitions. [2020-08-21 23:40:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 23:40:29,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:29,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:29,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:40:29,773 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash -242335011, now seen corresponding path program 1 times [2020-08-21 23:40:29,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:29,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680162313] [2020-08-21 23:40:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,028 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:30,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 23:40:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 23:40:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:40:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 23:40:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 23:40:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 23:40:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-21 23:40:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 23:40:30,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680162313] [2020-08-21 23:40:30,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:30,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:40:30,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205500073] [2020-08-21 23:40:30,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:40:30,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:40:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:40:30,246 INFO L87 Difference]: Start difference. First operand 1727 states and 2059 transitions. Second operand 11 states. [2020-08-21 23:40:30,835 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:33,067 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:33,288 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:33,535 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:33,788 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:34,034 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:34,516 INFO L93 Difference]: Finished difference Result 2058 states and 2631 transitions. [2020-08-21 23:40:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:40:34,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 23:40:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:34,529 INFO L225 Difference]: With dead ends: 2058 [2020-08-21 23:40:34,529 INFO L226 Difference]: Without dead ends: 2055 [2020-08-21 23:40:34,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:40:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2020-08-21 23:40:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1727. [2020-08-21 23:40:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-21 23:40:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2049 transitions. [2020-08-21 23:40:34,923 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2049 transitions. Word has length 136 [2020-08-21 23:40:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:34,923 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2049 transitions. [2020-08-21 23:40:34,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:40:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2049 transitions. [2020-08-21 23:40:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 23:40:34,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:34,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:34,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:40:34,930 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2128978130, now seen corresponding path program 1 times [2020-08-21 23:40:34,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:34,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517338216] [2020-08-21 23:40:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,260 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:35,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:40:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:40:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 23:40:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:40:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 23:40:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-21 23:40:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 23:40:35,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517338216] [2020-08-21 23:40:35,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:35,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:40:35,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554910684] [2020-08-21 23:40:35,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:40:35,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:40:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:40:35,488 INFO L87 Difference]: Start difference. First operand 1727 states and 2049 transitions. Second operand 12 states. [2020-08-21 23:40:36,055 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:36,689 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:37,214 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:37,481 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:37,723 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:38,027 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:38,306 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:38,557 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:40,325 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:41,118 INFO L93 Difference]: Finished difference Result 4160 states and 5347 transitions. [2020-08-21 23:40:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 23:40:41,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-21 23:40:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:41,134 INFO L225 Difference]: With dead ends: 4160 [2020-08-21 23:40:41,134 INFO L226 Difference]: Without dead ends: 2775 [2020-08-21 23:40:41,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:40:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-08-21 23:40:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2303. [2020-08-21 23:40:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-21 23:40:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2786 transitions. [2020-08-21 23:40:41,560 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2786 transitions. Word has length 136 [2020-08-21 23:40:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:41,563 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2786 transitions. [2020-08-21 23:40:41,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:40:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2786 transitions. [2020-08-21 23:40:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-21 23:40:41,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:41,571 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:41,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:40:41,571 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2052523815, now seen corresponding path program 2 times [2020-08-21 23:40:41,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:41,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574466476] [2020-08-21 23:40:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:40:41,670 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:40:41,670 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:40:41,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:40:41,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:40:41 BoogieIcfgContainer [2020-08-21 23:40:41,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:40:41,729 INFO L168 Benchmark]: Toolchain (without parser) took 52903.98 ms. Allocated memory was 144.2 MB in the beginning and 926.4 MB in the end (delta: 782.2 MB). Free memory was 99.4 MB in the beginning and 336.4 MB in the end (delta: -237.0 MB). Peak memory consumption was 545.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:40:41,730 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:40:41,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 753.34 ms. Allocated memory was 144.2 MB in the beginning and 199.8 MB in the end (delta: 55.6 MB). Free memory was 99.2 MB in the beginning and 164.1 MB in the end (delta: -64.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:40:41,732 INFO L168 Benchmark]: Boogie Preprocessor took 105.63 ms. Allocated memory is still 199.8 MB. Free memory was 164.1 MB in the beginning and 159.9 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:40:41,736 INFO L168 Benchmark]: RCFGBuilder took 1177.97 ms. Allocated memory was 199.8 MB in the beginning and 228.1 MB in the end (delta: 28.3 MB). Free memory was 159.9 MB in the beginning and 188.8 MB in the end (delta: -28.9 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:40:41,740 INFO L168 Benchmark]: TraceAbstraction took 50861.33 ms. Allocated memory was 228.1 MB in the beginning and 926.4 MB in the end (delta: 698.4 MB). Free memory was 188.8 MB in the beginning and 336.4 MB in the end (delta: -147.6 MB). Peak memory consumption was 550.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:40:41,744 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 753.34 ms. Allocated memory was 144.2 MB in the beginning and 199.8 MB in the end (delta: 55.6 MB). Free memory was 99.2 MB in the beginning and 164.1 MB in the end (delta: -64.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.63 ms. Allocated memory is still 199.8 MB. Free memory was 164.1 MB in the beginning and 159.9 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1177.97 ms. Allocated memory was 199.8 MB in the beginning and 228.1 MB in the end (delta: 28.3 MB). Free memory was 159.9 MB in the beginning and 188.8 MB in the end (delta: -28.9 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50861.33 ms. Allocated memory was 228.1 MB in the beginning and 926.4 MB in the end (delta: 698.4 MB). Free memory was 188.8 MB in the beginning and 336.4 MB in the end (delta: -147.6 MB). Peak memory consumption was 550.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 329]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L123] int pumpRunning = 0; [L124] int systemActive = 1; [L334] int cleanupTimeShifts = 4; [L434] int waterLevel = 1; [L435] int methaneLevelCritical = 0; [L697] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L410] int retValue_acc ; [L411] int tmp ; [L415] FCALL select_helpers() [L416] FCALL select_features() [L417] CALL, EXPR valid_product() [L946] int retValue_acc ; [L949] retValue_acc = 1 [L950] return (retValue_acc); [L417] RET, EXPR valid_product() [L417] tmp = valid_product() [L419] COND TRUE \read(tmp) [L421] FCALL setup() [L422] CALL runTest() [L401] CALL test() [L47] int splverifierCounter ; [L48] int tmp ; [L49] int tmp___0 ; [L50] int tmp___1 ; [L51] int tmp___2 ; [L54] splverifierCounter = 0 [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND TRUE \read(tmp) [L68] CALL waterRise() [L452] COND TRUE waterLevel < 2 [L453] waterLevel = waterLevel + 1 [L68] RET waterRise() [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND FALSE !(\read(pumpRunning)) [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND FALSE !(\read(pumpRunning)) [L204] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND TRUE ! pumpRunning [L165] CALL, EXPR isHighWaterLevel() [L283] int retValue_acc ; [L284] int tmp ; [L285] int tmp___0 ; [L289] CALL, EXPR isHighWaterSensorDry() [L514] int retValue_acc ; [L517] COND FALSE !(waterLevel < 2) [L521] retValue_acc = 0 [L522] return (retValue_acc); [L289] RET, EXPR isHighWaterSensorDry() [L289] tmp = isHighWaterSensorDry() [L291] COND FALSE !(\read(tmp)) [L294] tmp___0 = 1 [L296] retValue_acc = tmp___0 [L297] return (retValue_acc); [L165] RET, EXPR isHighWaterLevel() [L165] tmp = isHighWaterLevel() [L167] COND TRUE \read(tmp) [L169] CALL activatePump() [L214] pumpRunning = 1 [L169] RET activatePump() [L204] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND TRUE tmp == 0 [L904] CALL, EXPR isPumpRunning() [L238] int retValue_acc ; [L241] retValue_acc = pumpRunning [L242] return (retValue_acc); [L904] RET, EXPR isPumpRunning() [L904] tmp___0 = isPumpRunning() [L906] COND TRUE \read(tmp___0) [L908] CALL __automaton_fail() [L329] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 50.7s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 42.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1500 SDtfs, 4070 SDslu, 1869 SDs, 0 SdLazy, 11013 SolverSat, 3001 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 549 GetRequests, 358 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2303occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 1506 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1208 NumberOfCodeBlocks, 1208 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 361929 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 134/153 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...