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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product60.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:05:21,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:05:21,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:05:21,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:05:21,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:05:21,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:05:21,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:05:21,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:05:21,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:05:21,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:05:21,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:05:21,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:05:21,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:05:21,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:05:21,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:05:21,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:05:21,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:05:21,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:05:21,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:05:21,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:05:21,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:05:21,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:05:21,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:05:21,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:05:21,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:05:21,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:05:21,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:05:21,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:05:21,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:05:21,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:05:21,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:05:21,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:05:21,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:05:21,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:05:21,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:05:21,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:05:21,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:05:21,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:05:21,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:05:21,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:05:21,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:05:21,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:05:21,855 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:05:21,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:05:21,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:05:21,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:05:21,857 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:05:21,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:05:21,858 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:05:21,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:05:21,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:05:21,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:05:21,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:05:21,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:05:21,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:05:21,859 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:05:21,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:05:21,859 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:05:21,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:05:21,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:05:21,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:05:21,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:05:21,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:05:21,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:05:21,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:05:21,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:05:21,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:05:21,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:05:21,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:05:21,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:05:21,862 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:05:21,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:05:21,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:05:21,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:05:21,908 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:05:21,908 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:05:21,909 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product60.cil.c [2019-09-20 13:05:21,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fbdc3eb2/16a4d6ae71d14b868ab5131ad20818e1/FLAG2c9ce431c [2019-09-20 13:05:22,586 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:05:22,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec2_product60.cil.c [2019-09-20 13:05:22,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fbdc3eb2/16a4d6ae71d14b868ab5131ad20818e1/FLAG2c9ce431c [2019-09-20 13:05:22,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fbdc3eb2/16a4d6ae71d14b868ab5131ad20818e1 [2019-09-20 13:05:22,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:05:22,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:05:22,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:05:22,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:05:22,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:05:22,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:05:22" (1/1) ... [2019-09-20 13:05:22,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f680700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:22, skipping insertion in model container [2019-09-20 13:05:22,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:05:22" (1/1) ... [2019-09-20 13:05:22,866 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:05:22,928 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:05:23,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:05:23,376 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:05:23,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:05:23,552 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:05:23,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23 WrapperNode [2019-09-20 13:05:23,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:05:23,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:05:23,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:05:23,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:05:23,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... [2019-09-20 13:05:23,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:05:23,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:05:23,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:05:23,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:05:23,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-09-20 13:05:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:05:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:05:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-20 13:05:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-20 13:05:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-09-20 13:05:23,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-09-20 13:05:23,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-20 13:05:23,755 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-20 13:05:23,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-20 13:05:23,755 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-20 13:05:23,756 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-20 13:05:23,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:05:23,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-20 13:05:23,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-20 13:05:23,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-20 13:05:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:05:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-20 13:05:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-09-20 13:05:23,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-09-20 13:05:23,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-20 13:05:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-20 13:05:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-09-20 13:05:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:05:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-20 13:05:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:05:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-20 13:05:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-20 13:05:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:05:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:05:24,912 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:05:24,912 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:05:24,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:05:24 BoogieIcfgContainer [2019-09-20 13:05:24,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:05:24,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:05:24,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:05:24,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:05:24,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:05:22" (1/3) ... [2019-09-20 13:05:24,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4094f053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:05:24, skipping insertion in model container [2019-09-20 13:05:24,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:23" (2/3) ... [2019-09-20 13:05:24,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4094f053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:05:24, skipping insertion in model container [2019-09-20 13:05:24,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:05:24" (3/3) ... [2019-09-20 13:05:24,926 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product60.cil.c [2019-09-20 13:05:24,936 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:05:24,948 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:05:24,965 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:05:24,996 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:05:24,997 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:05:24,997 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:05:24,997 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:05:24,997 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:05:24,998 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:05:24,998 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:05:24,998 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:05:24,998 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:05:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2019-09-20 13:05:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:05:25,032 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:25,033 INFO L407 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] [2019-09-20 13:05:25,035 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash 694173544, now seen corresponding path program 1 times [2019-09-20 13:05:25,043 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:25,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:25,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:25,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:05:25,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:25,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:05:25,446 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:05:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:05:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:05:25,467 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 2 states. [2019-09-20 13:05:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:25,511 INFO L93 Difference]: Finished difference Result 306 states and 377 transitions. [2019-09-20 13:05:25,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:05:25,513 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 51 [2019-09-20 13:05:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:25,528 INFO L225 Difference]: With dead ends: 306 [2019-09-20 13:05:25,528 INFO L226 Difference]: Without dead ends: 155 [2019-09-20 13:05:25,533 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:05:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-20 13:05:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2019-09-20 13:05:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-09-20 13:05:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2019-09-20 13:05:25,594 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 51 [2019-09-20 13:05:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:25,595 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2019-09-20 13:05:25,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:05:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2019-09-20 13:05:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 13:05:25,599 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:25,599 INFO L407 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] [2019-09-20 13:05:25,600 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1863175654, now seen corresponding path program 1 times [2019-09-20 13:05:25,600 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:25,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:25,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:25,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:05:25,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:25,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:05:25,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:05:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:05:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:05:25,774 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand 3 states. [2019-09-20 13:05:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:25,818 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2019-09-20 13:05:25,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:05:25,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-09-20 13:05:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:25,821 INFO L225 Difference]: With dead ends: 245 [2019-09-20 13:05:25,822 INFO L226 Difference]: Without dead ends: 146 [2019-09-20 13:05:25,823 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:05:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-20 13:05:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2019-09-20 13:05:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-20 13:05:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2019-09-20 13:05:25,841 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 52 [2019-09-20 13:05:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:25,841 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2019-09-20 13:05:25,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:05:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2019-09-20 13:05:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-20 13:05:25,844 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:25,844 INFO L407 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] [2019-09-20 13:05:25,845 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 284161781, now seen corresponding path program 1 times [2019-09-20 13:05:25,845 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:25,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:05:26,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:26,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:05:26,054 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:05:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:05:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:05:26,055 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand 7 states. [2019-09-20 13:05:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:26,676 INFO L93 Difference]: Finished difference Result 433 states and 524 transitions. [2019-09-20 13:05:26,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:05:26,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-09-20 13:05:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:26,681 INFO L225 Difference]: With dead ends: 433 [2019-09-20 13:05:26,681 INFO L226 Difference]: Without dead ends: 315 [2019-09-20 13:05:26,683 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:05:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-09-20 13:05:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 303. [2019-09-20 13:05:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2019-09-20 13:05:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 366 transitions. [2019-09-20 13:05:26,753 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 366 transitions. Word has length 57 [2019-09-20 13:05:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:26,754 INFO L475 AbstractCegarLoop]: Abstraction has 303 states and 366 transitions. [2019-09-20 13:05:26,759 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:05:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 366 transitions. [2019-09-20 13:05:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-20 13:05:26,767 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:26,767 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:26,767 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:26,768 INFO L82 PathProgramCache]: Analyzing trace with hash 367003092, now seen corresponding path program 1 times [2019-09-20 13:05:26,768 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:26,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:26,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:26,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:26,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:05:26,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:26,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:05:26,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:05:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:05:26,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:05:26,958 INFO L87 Difference]: Start difference. First operand 303 states and 366 transitions. Second operand 6 states. [2019-09-20 13:05:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:27,238 INFO L93 Difference]: Finished difference Result 835 states and 1032 transitions. [2019-09-20 13:05:27,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:05:27,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2019-09-20 13:05:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:27,247 INFO L225 Difference]: With dead ends: 835 [2019-09-20 13:05:27,248 INFO L226 Difference]: Without dead ends: 560 [2019-09-20 13:05:27,254 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:05:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2019-09-20 13:05:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 554. [2019-09-20 13:05:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-20 13:05:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 672 transitions. [2019-09-20 13:05:27,347 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 672 transitions. Word has length 62 [2019-09-20 13:05:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:27,348 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 672 transitions. [2019-09-20 13:05:27,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:05:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 672 transitions. [2019-09-20 13:05:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-20 13:05:27,359 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:27,360 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:27,360 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash -612062288, now seen corresponding path program 1 times [2019-09-20 13:05:27,360 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:27,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:27,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:27,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:27,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:05:27,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:27,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:05:27,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:05:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:05:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:05:27,477 INFO L87 Difference]: Start difference. First operand 554 states and 672 transitions. Second operand 7 states. [2019-09-20 13:05:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:28,272 INFO L93 Difference]: Finished difference Result 1415 states and 1838 transitions. [2019-09-20 13:05:28,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:05:28,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2019-09-20 13:05:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:28,282 INFO L225 Difference]: With dead ends: 1415 [2019-09-20 13:05:28,282 INFO L226 Difference]: Without dead ends: 889 [2019-09-20 13:05:28,285 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:05:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2019-09-20 13:05:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 791. [2019-09-20 13:05:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2019-09-20 13:05:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 955 transitions. [2019-09-20 13:05:28,365 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 955 transitions. Word has length 66 [2019-09-20 13:05:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:28,367 INFO L475 AbstractCegarLoop]: Abstraction has 791 states and 955 transitions. [2019-09-20 13:05:28,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:05:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 955 transitions. [2019-09-20 13:05:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-20 13:05:28,372 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:28,372 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:28,372 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 637474211, now seen corresponding path program 1 times [2019-09-20 13:05:28,373 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:28,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:28,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:28,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:05:28,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:28,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:05:28,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:05:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:05:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:05:28,453 INFO L87 Difference]: Start difference. First operand 791 states and 955 transitions. Second operand 6 states. [2019-09-20 13:05:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:28,522 INFO L93 Difference]: Finished difference Result 1582 states and 1970 transitions. [2019-09-20 13:05:28,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:05:28,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-09-20 13:05:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:28,529 INFO L225 Difference]: With dead ends: 1582 [2019-09-20 13:05:28,529 INFO L226 Difference]: Without dead ends: 819 [2019-09-20 13:05:28,532 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:05:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2019-09-20 13:05:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 811. [2019-09-20 13:05:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2019-09-20 13:05:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 975 transitions. [2019-09-20 13:05:28,578 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 975 transitions. Word has length 104 [2019-09-20 13:05:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:28,579 INFO L475 AbstractCegarLoop]: Abstraction has 811 states and 975 transitions. [2019-09-20 13:05:28,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:05:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 975 transitions. [2019-09-20 13:05:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-20 13:05:28,582 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:28,582 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:28,582 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:28,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1729220383, now seen corresponding path program 1 times [2019-09-20 13:05:28,583 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:28,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:28,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:28,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:05:28,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:28,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:05:28,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:05:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:05:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:05:28,679 INFO L87 Difference]: Start difference. First operand 811 states and 975 transitions. Second operand 8 states. [2019-09-20 13:05:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:28,749 INFO L93 Difference]: Finished difference Result 1622 states and 2010 transitions. [2019-09-20 13:05:28,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:05:28,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 104 [2019-09-20 13:05:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:28,755 INFO L225 Difference]: With dead ends: 1622 [2019-09-20 13:05:28,755 INFO L226 Difference]: Without dead ends: 839 [2019-09-20 13:05:28,780 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:05:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-09-20 13:05:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 827. [2019-09-20 13:05:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-09-20 13:05:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 991 transitions. [2019-09-20 13:05:28,825 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 991 transitions. Word has length 104 [2019-09-20 13:05:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:28,825 INFO L475 AbstractCegarLoop]: Abstraction has 827 states and 991 transitions. [2019-09-20 13:05:28,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:05:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 991 transitions. [2019-09-20 13:05:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-20 13:05:28,828 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:28,828 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:28,828 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1969760512, now seen corresponding path program 1 times [2019-09-20 13:05:28,829 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:28,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:28,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:28,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:05:28,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:28,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:05:28,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:05:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:05:28,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:05:28,928 INFO L87 Difference]: Start difference. First operand 827 states and 991 transitions. Second operand 4 states. [2019-09-20 13:05:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:29,211 INFO L93 Difference]: Finished difference Result 2613 states and 3282 transitions. [2019-09-20 13:05:29,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:05:29,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-09-20 13:05:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:29,224 INFO L225 Difference]: With dead ends: 2613 [2019-09-20 13:05:29,224 INFO L226 Difference]: Without dead ends: 1814 [2019-09-20 13:05:29,230 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:05:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2019-09-20 13:05:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1783. [2019-09-20 13:05:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1783 states. [2019-09-20 13:05:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2191 transitions. [2019-09-20 13:05:29,361 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2191 transitions. Word has length 104 [2019-09-20 13:05:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:29,361 INFO L475 AbstractCegarLoop]: Abstraction has 1783 states and 2191 transitions. [2019-09-20 13:05:29,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:05:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2191 transitions. [2019-09-20 13:05:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-20 13:05:29,369 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:29,369 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:29,369 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 672707866, now seen corresponding path program 1 times [2019-09-20 13:05:29,370 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:29,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:29,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:29,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:05:29,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:29,571 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:29,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:29,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 13:05:29,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:05:30,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:05:30,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2019-09-20 13:05:30,051 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 13:05:30,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 13:05:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:05:30,054 INFO L87 Difference]: Start difference. First operand 1783 states and 2191 transitions. Second operand 19 states. [2019-09-20 13:05:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:31,734 INFO L93 Difference]: Finished difference Result 3508 states and 4358 transitions. [2019-09-20 13:05:31,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:05:31,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2019-09-20 13:05:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:31,747 INFO L225 Difference]: With dead ends: 3508 [2019-09-20 13:05:31,747 INFO L226 Difference]: Without dead ends: 1753 [2019-09-20 13:05:31,753 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2019-09-20 13:05:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2019-09-20 13:05:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1753. [2019-09-20 13:05:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2019-09-20 13:05:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2109 transitions. [2019-09-20 13:05:31,909 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2109 transitions. Word has length 108 [2019-09-20 13:05:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:31,911 INFO L475 AbstractCegarLoop]: Abstraction has 1753 states and 2109 transitions. [2019-09-20 13:05:31,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-20 13:05:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2109 transitions. [2019-09-20 13:05:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-20 13:05:31,924 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:31,924 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:05:31,925 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 19459107, now seen corresponding path program 1 times [2019-09-20 13:05:31,926 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:31,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:31,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-20 13:05:32,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:05:32,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:05:32,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:05:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:05:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:05:32,067 INFO L87 Difference]: Start difference. First operand 1753 states and 2109 transitions. Second operand 3 states. [2019-09-20 13:05:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:32,180 INFO L93 Difference]: Finished difference Result 2786 states and 3443 transitions. [2019-09-20 13:05:32,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:05:32,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-09-20 13:05:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:32,204 INFO L225 Difference]: With dead ends: 2786 [2019-09-20 13:05:32,204 INFO L226 Difference]: Without dead ends: 2783 [2019-09-20 13:05:32,207 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:05:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2019-09-20 13:05:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2625. [2019-09-20 13:05:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2625 states. [2019-09-20 13:05:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3251 transitions. [2019-09-20 13:05:32,396 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3251 transitions. Word has length 162 [2019-09-20 13:05:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:32,397 INFO L475 AbstractCegarLoop]: Abstraction has 2625 states and 3251 transitions. [2019-09-20 13:05:32,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:05:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3251 transitions. [2019-09-20 13:05:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-20 13:05:32,414 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:32,415 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:05:32,415 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2025500828, now seen corresponding path program 1 times [2019-09-20 13:05:32,416 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:32,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:32,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:32,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:32,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 11 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-20 13:05:32,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:32,560 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:32,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:32,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 13:05:32,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-09-20 13:05:33,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:05:33,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2019-09-20 13:05:33,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:05:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:05:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:05:33,017 INFO L87 Difference]: Start difference. First operand 2625 states and 3251 transitions. Second operand 6 states. [2019-09-20 13:05:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:34,020 INFO L93 Difference]: Finished difference Result 6013 states and 7852 transitions. [2019-09-20 13:05:34,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:05:34,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2019-09-20 13:05:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:34,043 INFO L225 Difference]: With dead ends: 6013 [2019-09-20 13:05:34,044 INFO L226 Difference]: Without dead ends: 3740 [2019-09-20 13:05:34,053 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:05:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2019-09-20 13:05:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3351. [2019-09-20 13:05:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3351 states. [2019-09-20 13:05:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4192 transitions. [2019-09-20 13:05:34,404 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4192 transitions. Word has length 227 [2019-09-20 13:05:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:34,405 INFO L475 AbstractCegarLoop]: Abstraction has 3351 states and 4192 transitions. [2019-09-20 13:05:34,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:05:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4192 transitions. [2019-09-20 13:05:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-20 13:05:34,436 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:34,437 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:05:34,437 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 667301872, now seen corresponding path program 1 times [2019-09-20 13:05:34,437 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:34,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:34,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:34,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:34,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-20 13:05:34,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:34,690 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:34,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:34,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-20 13:05:34,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-20 13:05:35,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:05:35,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-09-20 13:05:35,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:05:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:05:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:05:35,076 INFO L87 Difference]: Start difference. First operand 3351 states and 4192 transitions. Second operand 13 states. [2019-09-20 13:05:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:37,120 INFO L93 Difference]: Finished difference Result 9164 states and 13036 transitions. [2019-09-20 13:05:37,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:05:37,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 227 [2019-09-20 13:05:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:37,176 INFO L225 Difference]: With dead ends: 9164 [2019-09-20 13:05:37,176 INFO L226 Difference]: Without dead ends: 6177 [2019-09-20 13:05:37,197 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-09-20 13:05:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2019-09-20 13:05:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5803. [2019-09-20 13:05:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2019-09-20 13:05:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 7962 transitions. [2019-09-20 13:05:37,757 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 7962 transitions. Word has length 227 [2019-09-20 13:05:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:37,759 INFO L475 AbstractCegarLoop]: Abstraction has 5803 states and 7962 transitions. [2019-09-20 13:05:37,759 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:05:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 7962 transitions. [2019-09-20 13:05:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-09-20 13:05:37,788 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:37,789 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:05:37,789 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1547595962, now seen corresponding path program 1 times [2019-09-20 13:05:37,790 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:37,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:37,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:37,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:37,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 64 proven. 23 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-20 13:05:37,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:37,987 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:38,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:38,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 13:05:38,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:05:38,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:05:38,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-09-20 13:05:38,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 13:05:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 13:05:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:05:38,402 INFO L87 Difference]: Start difference. First operand 5803 states and 7962 transitions. Second operand 11 states. [2019-09-20 13:05:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:40,469 INFO L93 Difference]: Finished difference Result 14028 states and 19637 transitions. [2019-09-20 13:05:40,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:05:40,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 263 [2019-09-20 13:05:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:40,542 INFO L225 Difference]: With dead ends: 14028 [2019-09-20 13:05:40,542 INFO L226 Difference]: Without dead ends: 8761 [2019-09-20 13:05:40,564 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-09-20 13:05:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8761 states. [2019-09-20 13:05:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8761 to 8167. [2019-09-20 13:05:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8167 states. [2019-09-20 13:05:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 11102 transitions. [2019-09-20 13:05:41,140 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 11102 transitions. Word has length 263 [2019-09-20 13:05:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:41,140 INFO L475 AbstractCegarLoop]: Abstraction has 8167 states and 11102 transitions. [2019-09-20 13:05:41,140 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 13:05:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 11102 transitions. [2019-09-20 13:05:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-20 13:05:41,154 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:41,154 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:05:41,154 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1599354868, now seen corresponding path program 1 times [2019-09-20 13:05:41,155 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:41,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:41,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:41,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:41,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-20 13:05:41,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:41,384 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:41,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:41,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 13:05:41,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:41,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:05:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 13:05:41,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:05:41,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2019-09-20 13:05:41,741 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 13:05:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 13:05:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:05:41,742 INFO L87 Difference]: Start difference. First operand 8167 states and 11102 transitions. Second operand 15 states. [2019-09-20 13:05:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:44,536 INFO L93 Difference]: Finished difference Result 21611 states and 30855 transitions. [2019-09-20 13:05:44,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-20 13:05:44,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 223 [2019-09-20 13:05:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:44,626 INFO L225 Difference]: With dead ends: 21611 [2019-09-20 13:05:44,626 INFO L226 Difference]: Without dead ends: 13550 [2019-09-20 13:05:44,663 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2019-09-20 13:05:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13550 states. [2019-09-20 13:05:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13550 to 12179. [2019-09-20 13:05:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12179 states. [2019-09-20 13:05:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12179 states to 12179 states and 16906 transitions. [2019-09-20 13:05:45,495 INFO L78 Accepts]: Start accepts. Automaton has 12179 states and 16906 transitions. Word has length 223 [2019-09-20 13:05:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:45,495 INFO L475 AbstractCegarLoop]: Abstraction has 12179 states and 16906 transitions. [2019-09-20 13:05:45,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 13:05:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 12179 states and 16906 transitions. [2019-09-20 13:05:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-20 13:05:45,517 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:05:45,517 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:05:45,518 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:05:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:05:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1076637514, now seen corresponding path program 1 times [2019-09-20 13:05:45,518 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:05:45,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:05:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:45,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:05:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-20 13:05:46,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:05:46,246 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:05:46,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:05:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:05:46,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 13:05:46,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:05:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Stream closed [2019-09-20 13:05:46,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:05:46,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2019-09-20 13:05:46,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:05:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:05:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:05:46,573 INFO L87 Difference]: Start difference. First operand 12179 states and 16906 transitions. Second operand 13 states. [2019-09-20 13:05:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:05:46,785 INFO L93 Difference]: Finished difference Result 13859 states and 18782 transitions. [2019-09-20 13:05:46,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:05:46,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 223 [2019-09-20 13:05:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:05:46,789 INFO L225 Difference]: With dead ends: 13859 [2019-09-20 13:05:46,790 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:05:46,833 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:05:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:05:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:05:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:05:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:05:46,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 223 [2019-09-20 13:05:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:05:46,837 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:05:46,837 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:05:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:05:46,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:05:46,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 13:05:47,454 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 68 [2019-09-20 13:05:47,775 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 66 [2019-09-20 13:05:50,172 WARN L191 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 100 [2019-09-20 13:05:50,854 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 117 [2019-09-20 13:05:51,271 WARN L191 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 35 [2019-09-20 13:05:51,643 WARN L191 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 1 [2019-09-20 13:05:52,093 WARN L191 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 39 [2019-09-20 13:05:52,546 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 30