/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_product39.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:08:48,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:08:48,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:08:48,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:08:48,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:08:48,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:08:48,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:08:48,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:08:48,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:08:48,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:08:48,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:08:48,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:08:48,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:08:48,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:08:48,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:08:48,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:08:48,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:08:48,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:08:48,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:08:48,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:08:48,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:08:48,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:08:48,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:08:48,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:08:48,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:08:48,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:08:48,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:08:48,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:08:48,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:08:48,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:08:48,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:08:48,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:08:48,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:08:48,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:08:48,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:08:48,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:08:48,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:08:48,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:08:48,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:08:48,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:08:48,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:08:48,727 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 [2020-08-22 06:08:48,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:08:48,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:08:48,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:08:48,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:08:48,752 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:08:48,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:08:48,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:08:48,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:08:48,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:08:48,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:08:48,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:08:48,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:08:48,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:08:48,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:08:48,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:08:48,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:08:48,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:08:48,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:08:48,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:08:48,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:08:48,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:08:48,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:08:48,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:08:48,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:08:48,757 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:08:49,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:08:49,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:08:49,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:08:49,063 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:08:49,063 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:08:49,064 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product39.cil.c [2020-08-22 06:08:49,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219adfb1e/d15fd6122f534fabb54e01017a84d845/FLAG7cc988799 [2020-08-22 06:08:49,696 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:08:49,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product39.cil.c [2020-08-22 06:08:49,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219adfb1e/d15fd6122f534fabb54e01017a84d845/FLAG7cc988799 [2020-08-22 06:08:49,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219adfb1e/d15fd6122f534fabb54e01017a84d845 [2020-08-22 06:08:49,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:08:49,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:08:49,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:08:49,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:08:49,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:08:49,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:08:49" (1/1) ... [2020-08-22 06:08:49,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b01e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:49, skipping insertion in model container [2020-08-22 06:08:49,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:08:49" (1/1) ... [2020-08-22 06:08:50,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:08:50,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:08:50,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:08:50,488 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:08:50,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:08:50,606 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:08:50,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50 WrapperNode [2020-08-22 06:08:50,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:08:50,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:08:50,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:08:50,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:08:50,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (1/1) ... [2020-08-22 06:08:50,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:08:50,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:08:50,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:08:50,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:08:50,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (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 [2020-08-22 06:08:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:08:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:08:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 06:08:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 06:08:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 06:08:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 06:08:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 06:08:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 06:08:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 06:08:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 06:08:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 06:08:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 06:08:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 06:08:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 06:08:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 06:08:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 06:08:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 06:08:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 06:08:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 06:08:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 06:08:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 06:08:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 06:08:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 06:08:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-22 06:08:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-22 06:08:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 06:08:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 06:08:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 06:08:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 06:08:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 06:08:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:08:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-22 06:08:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:08:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:08:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 06:08:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 06:08:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 06:08:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 06:08:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 06:08:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 06:08:50,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:08:50,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:08:50,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 06:08:50,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:08:51,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:08:51,779 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 06:08:51,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:08:51 BoogieIcfgContainer [2020-08-22 06:08:51,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:08:51,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:08:51,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:08:51,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:08:51,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:08:49" (1/3) ... [2020-08-22 06:08:51,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107007a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:08:51, skipping insertion in model container [2020-08-22 06:08:51,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:08:50" (2/3) ... [2020-08-22 06:08:51,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107007a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:08:51, skipping insertion in model container [2020-08-22 06:08:51,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:08:51" (3/3) ... [2020-08-22 06:08:51,793 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product39.cil.c [2020-08-22 06:08:51,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:08:51,812 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:08:51,827 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:08:51,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:08:51,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:08:51,854 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:08:51,854 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:08:51,854 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:08:51,854 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:08:51,855 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:08:51,855 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:08:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-22 06:08:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 06:08:51,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:08:51,896 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] [2020-08-22 06:08:51,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:08:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:08:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1123456625, now seen corresponding path program 1 times [2020-08-22 06:08:51,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:08:51,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553931312] [2020-08-22 06:08:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:08:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,593 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:08:52,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:08:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:08:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:08:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:08:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:08:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:08:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:08:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:08:52,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553931312] [2020-08-22 06:08:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:08:52,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:08:52,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60753955] [2020-08-22 06:08:52,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:08:52,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:08:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:08:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:08:52,715 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 3 states. [2020-08-22 06:08:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:08:54,034 INFO L93 Difference]: Finished difference Result 307 states and 401 transitions. [2020-08-22 06:08:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:08:54,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-22 06:08:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:08:54,052 INFO L225 Difference]: With dead ends: 307 [2020-08-22 06:08:54,052 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 06:08:54,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:08:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 06:08:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 132. [2020-08-22 06:08:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 06:08:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-08-22 06:08:54,160 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 46 [2020-08-22 06:08:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:08:54,161 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-08-22 06:08:54,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:08:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-08-22 06:08:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 06:08:54,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:08:54,174 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] [2020-08-22 06:08:54,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:08:54,175 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:08:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:08:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash -790150173, now seen corresponding path program 1 times [2020-08-22 06:08:54,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:08:54,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957170899] [2020-08-22 06:08:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:08:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,559 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:08:54,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:08:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:08:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:08:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:08:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:08:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 06:08:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 06:08:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:08:54,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957170899] [2020-08-22 06:08:54,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:08:54,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:08:54,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301597018] [2020-08-22 06:08:54,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:08:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:08:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:08:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:08:54,603 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 4 states. [2020-08-22 06:08:55,006 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:08:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:08:55,927 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-08-22 06:08:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:08:55,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-22 06:08:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:08:55,936 INFO L225 Difference]: With dead ends: 234 [2020-08-22 06:08:55,937 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 06:08:55,938 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 [2020-08-22 06:08:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 06:08:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2020-08-22 06:08:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 06:08:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-08-22 06:08:55,981 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 47 [2020-08-22 06:08:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:08:55,981 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-08-22 06:08:55,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:08:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-08-22 06:08:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 06:08:55,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:08:56,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:08:56,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:08:56,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:08:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:08:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 271076632, now seen corresponding path program 1 times [2020-08-22 06:08:56,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:08:56,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300537872] [2020-08-22 06:08:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:08:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,332 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:08:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:08:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:08:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:08:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:08:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:08:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:08:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:08:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:08:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:08:56,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300537872] [2020-08-22 06:08:56,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:08:56,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:08:56,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828183883] [2020-08-22 06:08:56,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:08:56,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:08:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:08:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:08:56,437 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 8 states. [2020-08-22 06:08:56,835 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:08:57,184 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:08:57,441 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:08:57,677 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:08:58,460 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:00,295 INFO L93 Difference]: Finished difference Result 421 states and 521 transitions. [2020-08-22 06:09:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:09:00,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 06:09:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:00,301 INFO L225 Difference]: With dead ends: 421 [2020-08-22 06:09:00,301 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 06:09:00,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:09:00,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 06:09:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 264. [2020-08-22 06:09:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 06:09:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 318 transitions. [2020-08-22 06:09:00,423 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 318 transitions. Word has length 51 [2020-08-22 06:09:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:00,423 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 318 transitions. [2020-08-22 06:09:00,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:09:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 318 transitions. [2020-08-22 06:09:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 06:09:00,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:00,426 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] [2020-08-22 06:09:00,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:09:00,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1813365187, now seen corresponding path program 1 times [2020-08-22 06:09:00,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:00,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228089520] [2020-08-22 06:09:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,762 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 06:09:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:09:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 06:09:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:09:00,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228089520] [2020-08-22 06:09:00,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:09:00,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 06:09:00,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640831529] [2020-08-22 06:09:00,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:09:00,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:00,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:09:00,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:09:00,907 INFO L87 Difference]: Start difference. First operand 264 states and 318 transitions. Second operand 12 states. [2020-08-22 06:09:01,437 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:01,743 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:02,038 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:02,270 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:02,810 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:03,594 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:03,984 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:04,321 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:04,651 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:04,922 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:05,367 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:05,711 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:05,996 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:07,676 INFO L93 Difference]: Finished difference Result 1065 states and 1468 transitions. [2020-08-22 06:09:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 06:09:07,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-22 06:09:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:07,685 INFO L225 Difference]: With dead ends: 1065 [2020-08-22 06:09:07,685 INFO L226 Difference]: Without dead ends: 825 [2020-08-22 06:09:07,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-22 06:09:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-08-22 06:09:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 732. [2020-08-22 06:09:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-08-22 06:09:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 932 transitions. [2020-08-22 06:09:07,868 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 932 transitions. Word has length 57 [2020-08-22 06:09:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:07,868 INFO L479 AbstractCegarLoop]: Abstraction has 732 states and 932 transitions. [2020-08-22 06:09:07,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:09:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 932 transitions. [2020-08-22 06:09:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 06:09:07,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:07,872 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] [2020-08-22 06:09:07,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:09:07,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2128676035, now seen corresponding path program 1 times [2020-08-22 06:09:07,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:07,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281467283] [2020-08-22 06:09:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,119 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:08,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 06:09:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:09:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 06:09:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 06:09:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:09:08,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281467283] [2020-08-22 06:09:08,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:09:08,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:09:08,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851323324] [2020-08-22 06:09:08,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:09:08,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:08,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:09:08,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:09:08,204 INFO L87 Difference]: Start difference. First operand 732 states and 932 transitions. Second operand 6 states. [2020-08-22 06:09:08,527 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:10,197 INFO L93 Difference]: Finished difference Result 1759 states and 2407 transitions. [2020-08-22 06:09:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:09:10,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-22 06:09:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:10,208 INFO L225 Difference]: With dead ends: 1759 [2020-08-22 06:09:10,208 INFO L226 Difference]: Without dead ends: 1051 [2020-08-22 06:09:10,212 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 [2020-08-22 06:09:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-08-22 06:09:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 964. [2020-08-22 06:09:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-08-22 06:09:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1220 transitions. [2020-08-22 06:09:10,399 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1220 transitions. Word has length 61 [2020-08-22 06:09:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:10,400 INFO L479 AbstractCegarLoop]: Abstraction has 964 states and 1220 transitions. [2020-08-22 06:09:10,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:09:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1220 transitions. [2020-08-22 06:09:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 06:09:10,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:10,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:09:10,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:09:10,403 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:10,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1754610703, now seen corresponding path program 1 times [2020-08-22 06:09:10,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:10,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072037074] [2020-08-22 06:09:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,708 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:10,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 06:09:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:09:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 06:09:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 06:09:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 06:09:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 06:09:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 06:09:10,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072037074] [2020-08-22 06:09:10,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:10,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:09:10,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183396600] [2020-08-22 06:09:10,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:09:10,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:10,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:09:10,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:09:10,836 INFO L87 Difference]: Start difference. First operand 964 states and 1220 transitions. Second operand 10 states. [2020-08-22 06:09:11,428 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-22 06:09:11,985 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:13,789 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:15,767 INFO L93 Difference]: Finished difference Result 1865 states and 2457 transitions. [2020-08-22 06:09:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 06:09:15,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-22 06:09:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:15,776 INFO L225 Difference]: With dead ends: 1865 [2020-08-22 06:09:15,777 INFO L226 Difference]: Without dead ends: 1168 [2020-08-22 06:09:15,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:09:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-08-22 06:09:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1071. [2020-08-22 06:09:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-08-22 06:09:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1331 transitions. [2020-08-22 06:09:15,959 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1331 transitions. Word has length 88 [2020-08-22 06:09:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:15,960 INFO L479 AbstractCegarLoop]: Abstraction has 1071 states and 1331 transitions. [2020-08-22 06:09:15,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:09:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1331 transitions. [2020-08-22 06:09:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-22 06:09:15,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:15,965 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] [2020-08-22 06:09:15,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:09:15,965 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1977854615, now seen corresponding path program 1 times [2020-08-22 06:09:15,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:15,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998714992] [2020-08-22 06:09:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,326 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:16,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:09:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:09:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:09:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 06:09:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:09:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 06:09:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 06:09:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 06:09:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 06:09:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 06:09:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998714992] [2020-08-22 06:09:16,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:16,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:09:16,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714451140] [2020-08-22 06:09:16,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:09:16,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:09:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:09:16,524 INFO L87 Difference]: Start difference. First operand 1071 states and 1331 transitions. Second operand 10 states. [2020-08-22 06:09:17,825 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:18,091 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:09:18,352 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:18,613 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:19,509 INFO L93 Difference]: Finished difference Result 2259 states and 2935 transitions. [2020-08-22 06:09:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:09:19,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 130 [2020-08-22 06:09:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:19,519 INFO L225 Difference]: With dead ends: 2259 [2020-08-22 06:09:19,519 INFO L226 Difference]: Without dead ends: 1212 [2020-08-22 06:09:19,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:09:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-08-22 06:09:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1101. [2020-08-22 06:09:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-08-22 06:09:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1365 transitions. [2020-08-22 06:09:19,740 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1365 transitions. Word has length 130 [2020-08-22 06:09:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:19,740 INFO L479 AbstractCegarLoop]: Abstraction has 1101 states and 1365 transitions. [2020-08-22 06:09:19,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:09:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1365 transitions. [2020-08-22 06:09:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-22 06:09:19,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:19,745 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] [2020-08-22 06:09:19,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:09:19,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 920016537, now seen corresponding path program 1 times [2020-08-22 06:09:19,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:19,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706242790] [2020-08-22 06:09:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,020 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:09:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:09:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:09:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 06:09:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:09:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 06:09:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 06:09:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 06:09:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 06:09:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 06:09:20,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706242790] [2020-08-22 06:09:20,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:20,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:09:20,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875081785] [2020-08-22 06:09:20,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:09:20,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:09:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:09:20,233 INFO L87 Difference]: Start difference. First operand 1101 states and 1365 transitions. Second operand 12 states. [2020-08-22 06:09:20,826 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:21,074 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:21,314 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:21,969 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:22,243 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:22,490 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:23,537 INFO L93 Difference]: Finished difference Result 2069 states and 2643 transitions. [2020-08-22 06:09:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 06:09:23,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-08-22 06:09:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:23,544 INFO L225 Difference]: With dead ends: 2069 [2020-08-22 06:09:23,544 INFO L226 Difference]: Without dead ends: 992 [2020-08-22 06:09:23,548 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 [2020-08-22 06:09:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-08-22 06:09:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 936. [2020-08-22 06:09:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-08-22 06:09:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1136 transitions. [2020-08-22 06:09:23,766 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1136 transitions. Word has length 130 [2020-08-22 06:09:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:23,767 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1136 transitions. [2020-08-22 06:09:23,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:09:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1136 transitions. [2020-08-22 06:09:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-22 06:09:23,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:23,771 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] [2020-08-22 06:09:23,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:09:23,772 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1767310158, now seen corresponding path program 1 times [2020-08-22 06:09:23,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:23,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280081562] [2020-08-22 06:09:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,068 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 06:09:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 06:09:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:09:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:09:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:09:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 06:09:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 06:09:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 06:09:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 06:09:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-22 06:09:24,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280081562] [2020-08-22 06:09:24,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:24,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 06:09:24,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106499895] [2020-08-22 06:09:24,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 06:09:24,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:24,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 06:09:24,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:09:24,283 INFO L87 Difference]: Start difference. First operand 936 states and 1136 transitions. Second operand 13 states. [2020-08-22 06:09:25,119 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:25,826 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:27,830 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:28,118 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:28,355 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:28,584 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:28,854 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:29,110 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:29,366 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:29,613 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:29,874 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:30,114 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:30,835 INFO L93 Difference]: Finished difference Result 2701 states and 3404 transitions. [2020-08-22 06:09:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 06:09:30,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2020-08-22 06:09:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:30,849 INFO L225 Difference]: With dead ends: 2701 [2020-08-22 06:09:30,849 INFO L226 Difference]: Without dead ends: 1789 [2020-08-22 06:09:30,853 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 [2020-08-22 06:09:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2020-08-22 06:09:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1687. [2020-08-22 06:09:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2020-08-22 06:09:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2019 transitions. [2020-08-22 06:09:31,163 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2019 transitions. Word has length 130 [2020-08-22 06:09:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:31,167 INFO L479 AbstractCegarLoop]: Abstraction has 1687 states and 2019 transitions. [2020-08-22 06:09:31,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 06:09:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2019 transitions. [2020-08-22 06:09:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 06:09:31,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:31,173 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 06:09:31,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:09:31,173 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash 941448042, now seen corresponding path program 1 times [2020-08-22 06:09:31,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:31,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568304270] [2020-08-22 06:09:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,452 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:31,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 06:09:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 06:09:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:09:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:09:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:09:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:09:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 06:09:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 06:09:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 06:09:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 06:09:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 06:09:31,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568304270] [2020-08-22 06:09:31,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:31,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 06:09:31,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765352405] [2020-08-22 06:09:31,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:09:31,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:09:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:09:31,625 INFO L87 Difference]: Start difference. First operand 1687 states and 2019 transitions. Second operand 11 states. [2020-08-22 06:09:32,107 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:34,071 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:34,297 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:34,560 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:34,834 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:35,073 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:35,681 INFO L93 Difference]: Finished difference Result 1997 states and 2554 transitions. [2020-08-22 06:09:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 06:09:35,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2020-08-22 06:09:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:35,701 INFO L225 Difference]: With dead ends: 1997 [2020-08-22 06:09:35,702 INFO L226 Difference]: Without dead ends: 1994 [2020-08-22 06:09:35,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-08-22 06:09:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2020-08-22 06:09:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1687. [2020-08-22 06:09:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2020-08-22 06:09:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2009 transitions. [2020-08-22 06:09:36,062 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2009 transitions. Word has length 134 [2020-08-22 06:09:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:36,065 INFO L479 AbstractCegarLoop]: Abstraction has 1687 states and 2009 transitions. [2020-08-22 06:09:36,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:09:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2009 transitions. [2020-08-22 06:09:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 06:09:36,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:36,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:09:36,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:09:36,071 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 108116472, now seen corresponding path program 1 times [2020-08-22 06:09:36,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:36,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720129220] [2020-08-22 06:09:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,374 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 06:09:36,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:09:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:09:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:09:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:09:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:09:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 06:09:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 06:09:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:09:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:09:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:09:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 06:09:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:09:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 06:09:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:09:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 06:09:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 06:09:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:09:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 06:09:36,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720129220] [2020-08-22 06:09:36,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:09:36,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:09:36,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428563051] [2020-08-22 06:09:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:09:36,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:09:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:09:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:09:36,582 INFO L87 Difference]: Start difference. First operand 1687 states and 2009 transitions. Second operand 12 states. [2020-08-22 06:09:37,419 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:09:38,235 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:09:38,518 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:38,768 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:39,011 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:39,249 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 06:09:39,568 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:40,273 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 06:09:40,547 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:40,802 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:09:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:09:43,002 INFO L93 Difference]: Finished difference Result 4159 states and 5274 transitions. [2020-08-22 06:09:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 06:09:43,002 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-08-22 06:09:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:09:43,020 INFO L225 Difference]: With dead ends: 4159 [2020-08-22 06:09:43,020 INFO L226 Difference]: Without dead ends: 2806 [2020-08-22 06:09:43,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-08-22 06:09:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-08-22 06:09:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2479. [2020-08-22 06:09:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2020-08-22 06:09:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3004 transitions. [2020-08-22 06:09:43,394 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3004 transitions. Word has length 134 [2020-08-22 06:09:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:09:43,395 INFO L479 AbstractCegarLoop]: Abstraction has 2479 states and 3004 transitions. [2020-08-22 06:09:43,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:09:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3004 transitions. [2020-08-22 06:09:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 06:09:43,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:09:43,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:09:43,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:09:43,408 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:09:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:09:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash -116138867, now seen corresponding path program 2 times [2020-08-22 06:09:43,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:09:43,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792525011] [2020-08-22 06:09:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:09:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 06:09:43,468 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 06:09:43,468 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 06:09:43,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:09:43,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:09:43 BoogieIcfgContainer [2020-08-22 06:09:43,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:09:43,506 INFO L168 Benchmark]: Toolchain (without parser) took 53517.16 ms. Allocated memory was 141.0 MB in the beginning and 818.4 MB in the end (delta: 677.4 MB). Free memory was 102.9 MB in the beginning and 262.0 MB in the end (delta: -159.1 MB). Peak memory consumption was 518.3 MB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,506 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 617.14 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 170.8 MB in the end (delta: -68.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,508 INFO L168 Benchmark]: Boogie Preprocessor took 99.05 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 166.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,508 INFO L168 Benchmark]: RCFGBuilder took 1078.13 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.6 MB in the beginning and 190.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,509 INFO L168 Benchmark]: TraceAbstraction took 51718.04 ms. Allocated memory was 235.4 MB in the beginning and 818.4 MB in the end (delta: 583.0 MB). Free memory was 190.9 MB in the beginning and 262.0 MB in the end (delta: -71.1 MB). Peak memory consumption was 511.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:09:43,511 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 617.14 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 170.8 MB in the end (delta: -68.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.05 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 166.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1078.13 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.6 MB in the beginning and 190.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51718.04 ms. Allocated memory was 235.4 MB in the beginning and 818.4 MB in the end (delta: 583.0 MB). Free memory was 190.9 MB in the beginning and 262.0 MB in the end (delta: -71.1 MB). Peak memory consumption was 511.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L247] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L524] int pumpRunning = 0; [L525] int systemActive = 1; [L728] int waterLevel = 1; [L729] int methaneLevelCritical = 0; [L822] int cleanupTimeShifts = 4; [L895] int retValue_acc ; [L896] int tmp ; [L900] FCALL select_helpers() [L901] FCALL select_features() [L902] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L902] RET, EXPR valid_product() [L902] tmp = valid_product() [L904] COND TRUE \read(tmp) [L906] FCALL setup() [L907] CALL runTest() [L889] CALL test() [L450] int splverifierCounter ; [L451] int tmp ; [L452] int tmp___0 ; [L453] int tmp___1 ; [L454] int tmp___2 ; [L457] splverifierCounter = 0 [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND TRUE \read(tmp) [L471] CALL waterRise() [L746] COND TRUE waterLevel < 2 [L747] waterLevel = waterLevel + 1 [L471] RET waterRise() [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND FALSE !(\read(pumpRunning)) [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND FALSE !(\read(pumpRunning)) [L605] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND TRUE ! pumpRunning [L566] CALL, EXPR isHighWaterLevel() [L684] int retValue_acc ; [L685] int tmp ; [L686] int tmp___0 ; [L690] CALL, EXPR isHighWaterSensorDry() [L808] int retValue_acc ; [L811] COND FALSE !(waterLevel < 2) [L815] retValue_acc = 0 [L816] return (retValue_acc); [L690] RET, EXPR isHighWaterSensorDry() [L690] tmp = isHighWaterSensorDry() [L692] COND FALSE !(\read(tmp)) [L695] tmp___0 = 1 [L697] retValue_acc = tmp___0 [L698] return (retValue_acc); [L566] RET, EXPR isHighWaterLevel() [L566] tmp = isHighWaterLevel() [L568] COND TRUE \read(tmp) [L570] CALL activatePump() [L615] pumpRunning = 1 [L570] RET activatePump() [L605] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND FALSE !(tmp == 0) [L547] RET __utac_acc__Specification4_spec__1() [L504] RET timeShift() [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND FALSE !(\read(tmp)) [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND TRUE \read(pumpRunning) [L534] CALL lowerWaterLevel() [L734] COND TRUE waterLevel > 0 [L735] waterLevel = waterLevel - 1 [L534] RET lowerWaterLevel() [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND TRUE \read(pumpRunning) [L592] CALL, EXPR isMethaneAlarm() [L628] int retValue_acc ; [L632] CALL, EXPR isMethaneLevelCritical() [L767] int retValue_acc ; [L770] retValue_acc = methaneLevelCritical [L771] return (retValue_acc); [L632] RET, EXPR isMethaneLevelCritical() [L632] retValue_acc = isMethaneLevelCritical() [L634] return (retValue_acc); [L592] RET, EXPR isMethaneAlarm() [L592] tmp = isMethaneAlarm() [L594] COND FALSE !(\read(tmp)) [L600] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND FALSE !(! pumpRunning) [L579] FCALL processEnvironment__wrappee__base() [L600] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND FALSE !(tmp == 0) [L547] RET __utac_acc__Specification4_spec__1() [L504] RET timeShift() [L459] COND TRUE 1 [L461] COND TRUE splverifierCounter < 4 [L467] tmp = __VERIFIER_nondet_int() [L469] COND FALSE !(\read(tmp)) [L477] tmp___0 = __VERIFIER_nondet_int() [L479] COND FALSE !(\read(tmp___0)) [L487] tmp___2 = __VERIFIER_nondet_int() [L489] COND TRUE \read(tmp___2) [L504] CALL timeShift() [L532] COND TRUE \read(pumpRunning) [L534] CALL lowerWaterLevel() [L734] COND TRUE waterLevel > 0 [L735] waterLevel = waterLevel - 1 [L534] RET lowerWaterLevel() [L539] COND TRUE \read(systemActive) [L541] CALL processEnvironment() [L587] int tmp ; [L590] COND TRUE \read(pumpRunning) [L592] CALL, EXPR isMethaneAlarm() [L628] int retValue_acc ; [L632] CALL, EXPR isMethaneLevelCritical() [L767] int retValue_acc ; [L770] retValue_acc = methaneLevelCritical [L771] return (retValue_acc); [L632] RET, EXPR isMethaneLevelCritical() [L632] retValue_acc = isMethaneLevelCritical() [L634] return (retValue_acc); [L592] RET, EXPR isMethaneAlarm() [L592] tmp = isMethaneAlarm() [L594] COND FALSE !(\read(tmp)) [L600] CALL processEnvironment__wrappee__highWaterSensor() [L561] int tmp ; [L564] COND FALSE !(! pumpRunning) [L579] FCALL processEnvironment__wrappee__base() [L600] RET processEnvironment__wrappee__highWaterSensor() [L541] RET processEnvironment() [L547] CALL __utac_acc__Specification4_spec__1() [L919] int tmp ; [L920] int tmp___0 ; [L924] CALL, EXPR getWaterLevel() [L799] int retValue_acc ; [L802] retValue_acc = waterLevel [L803] return (retValue_acc); [L924] RET, EXPR getWaterLevel() [L924] tmp = getWaterLevel() [L926] COND TRUE tmp == 0 [L928] CALL, EXPR isPumpRunning() [L639] int retValue_acc ; [L642] retValue_acc = pumpRunning [L643] return (retValue_acc); [L928] RET, EXPR isPumpRunning() [L928] tmp___0 = isPumpRunning() [L930] COND TRUE \read(tmp___0) [L932] CALL __automaton_fail() [L722] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 231 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.6s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 43.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1441 SDtfs, 3438 SDslu, 1745 SDs, 0 SdLazy, 10729 SolverSat, 2370 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 357 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2479occurred 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: 2.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 1299 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1193 NumberOfCodeBlocks, 1193 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 356988 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 128/147 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...