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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:16:56,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:16:56,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:16:56,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:16:56,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:16:56,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:16:56,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:16:56,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:16:56,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:16:56,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:16:56,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:16:56,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:16:56,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:16:56,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:16:56,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:16:56,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:16:56,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:16:56,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:16:56,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:16:56,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:16:56,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:16:56,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:16:56,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:16:56,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:16:56,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:16:56,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:16:56,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:16:56,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:16:56,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:16:56,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:16:56,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:16:56,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:16:56,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:16:56,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:16:56,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:16:56,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:16:56,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:16:56,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:16:56,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:16:56,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:16:56,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:16:56,754 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 [2019-10-13 23:16:56,774 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:16:56,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:16:56,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:16:56,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:16:56,780 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:16:56,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:16:56,780 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:16:56,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:16:56,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:16:56,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:16:56,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:16:56,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:16:56,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:16:56,783 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:16:56,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:16:56,783 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:16:56,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:16:56,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:16:56,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:16:56,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:16:56,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:16:56,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:16:56,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:16:56,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:16:57,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:16:57,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:16:57,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:16:57,106 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:16:57,106 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:16:57,107 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c [2019-10-13 23:16:57,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9313307/feb9ec0f3ad14123bb4ca45d1ccacc10/FLAG7ab015dca [2019-10-13 23:16:57,721 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:16:57,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product54.cil.c [2019-10-13 23:16:57,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9313307/feb9ec0f3ad14123bb4ca45d1ccacc10/FLAG7ab015dca [2019-10-13 23:16:57,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa9313307/feb9ec0f3ad14123bb4ca45d1ccacc10 [2019-10-13 23:16:57,995 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:16:57,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:16:57,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:16:57,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:16:58,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:16:58,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:16:57" (1/1) ... [2019-10-13 23:16:58,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e33a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58, skipping insertion in model container [2019-10-13 23:16:58,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:16:57" (1/1) ... [2019-10-13 23:16:58,014 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:16:58,071 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:16:58,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:16:58,552 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:16:58,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:16:58,694 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:16:58,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58 WrapperNode [2019-10-13 23:16:58,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:16:58,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:16:58,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:16:58,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:16:58,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (1/1) ... [2019-10-13 23:16:58,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:16:58,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:16:58,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:16:58,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:16:58,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (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 [2019-10-13 23:16:58,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:16:58,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:16:58,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:16:58,879 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:16:58,880 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:16:58,882 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:16:58,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:16:58,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-13 23:16:58,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:16:58,884 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:16:58,884 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:16:58,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:16:58,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:16:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:16:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:16:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 23:16:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-13 23:16:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:16:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:16:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:16:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:16:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:16:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:16:58,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:16:58,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:16:58,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:16:58,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:16:58,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:16:58,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:16:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:16:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:16:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:16:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:16:58,893 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:16:58,894 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:16:58,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:16:58,895 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:16:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-13 23:16:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:16:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 23:16:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:16:58,900 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:16:58,900 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:16:58,900 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:16:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:16:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:16:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:16:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:16:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:16:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:16:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:16:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:16:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:16:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:16:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:16:58,905 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:16:58,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:16:58,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:16:58,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:16:58,906 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:16:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:16:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:16:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:16:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:16:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:16:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:16:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:16:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:16:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:16:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:16:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:16:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:16:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:16:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:16:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:16:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:16:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:17:00,578 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:17:00,578 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:17:00,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:00 BoogieIcfgContainer [2019-10-13 23:17:00,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:17:00,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:17:00,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:17:00,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:17:00,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:16:57" (1/3) ... [2019-10-13 23:17:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a1937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:00, skipping insertion in model container [2019-10-13 23:17:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:16:58" (2/3) ... [2019-10-13 23:17:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a1937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:00, skipping insertion in model container [2019-10-13 23:17:00,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:00" (3/3) ... [2019-10-13 23:17:00,592 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product54.cil.c [2019-10-13 23:17:00,603 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:17:00,612 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:17:00,624 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:17:00,662 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:17:00,662 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:17:00,662 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:17:00,662 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:17:00,663 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:17:00,663 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:17:00,664 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:17:00,664 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:17:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2019-10-13 23:17:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 23:17:00,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:00,710 INFO L380 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] [2019-10-13 23:17:00,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1586789797, now seen corresponding path program 1 times [2019-10-13 23:17:00,729 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:00,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199319087] [2019-10-13 23:17:00,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:00,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:00,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:01,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199319087] [2019-10-13 23:17:01,097 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:01,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:17:01,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830327228] [2019-10-13 23:17:01,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:17:01,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:17:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:17:01,119 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 2 states. [2019-10-13 23:17:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:01,158 INFO L93 Difference]: Finished difference Result 251 states and 302 transitions. [2019-10-13 23:17:01,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:17:01,160 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-13 23:17:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:01,173 INFO L225 Difference]: With dead ends: 251 [2019-10-13 23:17:01,173 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 23:17:01,178 INFO L600 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 [2019-10-13 23:17:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 23:17:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-10-13 23:17:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 23:17:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2019-10-13 23:17:01,236 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 42 [2019-10-13 23:17:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:01,236 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2019-10-13 23:17:01,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:17:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2019-10-13 23:17:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 23:17:01,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:01,240 INFO L380 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] [2019-10-13 23:17:01,241 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -418881645, now seen corresponding path program 1 times [2019-10-13 23:17:01,242 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:01,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741537701] [2019-10-13 23:17:01,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:01,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741537701] [2019-10-13 23:17:01,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:01,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:17:01,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951718495] [2019-10-13 23:17:01,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:17:01,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:17:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:17:01,346 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 3 states. [2019-10-13 23:17:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:01,370 INFO L93 Difference]: Finished difference Result 205 states and 236 transitions. [2019-10-13 23:17:01,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:17:01,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-13 23:17:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:01,375 INFO L225 Difference]: With dead ends: 205 [2019-10-13 23:17:01,376 INFO L226 Difference]: Without dead ends: 118 [2019-10-13 23:17:01,378 INFO L600 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 [2019-10-13 23:17:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-13 23:17:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-13 23:17:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-13 23:17:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2019-10-13 23:17:01,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 43 [2019-10-13 23:17:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:01,410 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2019-10-13 23:17:01,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:17:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2019-10-13 23:17:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 23:17:01,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:01,415 INFO L380 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] [2019-10-13 23:17:01,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1622158275, now seen corresponding path program 1 times [2019-10-13 23:17:01,418 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:01,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186390827] [2019-10-13 23:17:01,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:01,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:01,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186390827] [2019-10-13 23:17:01,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:01,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:17:01,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111010910] [2019-10-13 23:17:01,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:01,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:01,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:17:01,615 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand 7 states. [2019-10-13 23:17:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:01,980 INFO L93 Difference]: Finished difference Result 214 states and 247 transitions. [2019-10-13 23:17:01,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:17:01,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-13 23:17:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:01,984 INFO L225 Difference]: With dead ends: 214 [2019-10-13 23:17:01,984 INFO L226 Difference]: Without dead ends: 118 [2019-10-13 23:17:01,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-13 23:17:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-13 23:17:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-13 23:17:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2019-10-13 23:17:02,010 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 46 [2019-10-13 23:17:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:02,011 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2019-10-13 23:17:02,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2019-10-13 23:17:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:17:02,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:02,014 INFO L380 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] [2019-10-13 23:17:02,014 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2035409191, now seen corresponding path program 1 times [2019-10-13 23:17:02,015 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:02,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322490597] [2019-10-13 23:17:02,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:02,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:02,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:02,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322490597] [2019-10-13 23:17:02,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:02,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:17:02,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627061527] [2019-10-13 23:17:02,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:17:02,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:17:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:17:02,161 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand 5 states. [2019-10-13 23:17:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:02,673 INFO L93 Difference]: Finished difference Result 310 states and 366 transitions. [2019-10-13 23:17:02,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:17:02,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 23:17:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:02,679 INFO L225 Difference]: With dead ends: 310 [2019-10-13 23:17:02,679 INFO L226 Difference]: Without dead ends: 214 [2019-10-13 23:17:02,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-10-13 23:17:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2019-10-13 23:17:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-10-13 23:17:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 216 transitions. [2019-10-13 23:17:02,727 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 216 transitions. Word has length 63 [2019-10-13 23:17:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:02,728 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 216 transitions. [2019-10-13 23:17:02,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:17:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 216 transitions. [2019-10-13 23:17:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 23:17:02,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:02,730 INFO L380 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:02,730 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash -539562389, now seen corresponding path program 1 times [2019-10-13 23:17:02,731 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:02,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588896608] [2019-10-13 23:17:02,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:02,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:02,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:02,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588896608] [2019-10-13 23:17:02,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:02,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:17:02,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310745194] [2019-10-13 23:17:02,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:17:02,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:17:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:02,874 INFO L87 Difference]: Start difference. First operand 197 states and 216 transitions. Second operand 10 states. [2019-10-13 23:17:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:03,349 INFO L93 Difference]: Finished difference Result 570 states and 653 transitions. [2019-10-13 23:17:03,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:17:03,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-10-13 23:17:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:03,355 INFO L225 Difference]: With dead ends: 570 [2019-10-13 23:17:03,355 INFO L226 Difference]: Without dead ends: 395 [2019-10-13 23:17:03,356 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2019-10-13 23:17:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 381. [2019-10-13 23:17:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-10-13 23:17:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 424 transitions. [2019-10-13 23:17:03,391 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 424 transitions. Word has length 73 [2019-10-13 23:17:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:03,392 INFO L462 AbstractCegarLoop]: Abstraction has 381 states and 424 transitions. [2019-10-13 23:17:03,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:17:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 424 transitions. [2019-10-13 23:17:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 23:17:03,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:03,395 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:17:03,395 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:03,396 INFO L82 PathProgramCache]: Analyzing trace with hash 583352494, now seen corresponding path program 1 times [2019-10-13 23:17:03,396 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:03,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798461380] [2019-10-13 23:17:03,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:03,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:03,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:17:03,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798461380] [2019-10-13 23:17:03,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150363003] [2019-10-13 23:17:03,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:03,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:17:03,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:17:04,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:17:04,604 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:04,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [14] total 26 [2019-10-13 23:17:04,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734382057] [2019-10-13 23:17:04,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:04,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:04,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:04,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-10-13 23:17:04,607 INFO L87 Difference]: Start difference. First operand 381 states and 424 transitions. Second operand 14 states. [2019-10-13 23:17:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:05,531 INFO L93 Difference]: Finished difference Result 914 states and 1022 transitions. [2019-10-13 23:17:05,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:17:05,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2019-10-13 23:17:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:05,537 INFO L225 Difference]: With dead ends: 914 [2019-10-13 23:17:05,537 INFO L226 Difference]: Without dead ends: 739 [2019-10-13 23:17:05,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-10-13 23:17:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2019-10-13 23:17:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 736. [2019-10-13 23:17:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-10-13 23:17:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 821 transitions. [2019-10-13 23:17:05,602 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 821 transitions. Word has length 117 [2019-10-13 23:17:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:05,603 INFO L462 AbstractCegarLoop]: Abstraction has 736 states and 821 transitions. [2019-10-13 23:17:05,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 821 transitions. [2019-10-13 23:17:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:17:05,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:05,614 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:17:05,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:05,821 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash -30660136, now seen corresponding path program 1 times [2019-10-13 23:17:05,822 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:05,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480073204] [2019-10-13 23:17:05,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:17:06,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480073204] [2019-10-13 23:17:06,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932395] [2019-10-13 23:17:06,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:17:06,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:17:06,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 23:17:06,595 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:06,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [14] total 19 [2019-10-13 23:17:06,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417421069] [2019-10-13 23:17:06,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:06,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:06,598 INFO L87 Difference]: Start difference. First operand 736 states and 821 transitions. Second operand 7 states. [2019-10-13 23:17:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:06,899 INFO L93 Difference]: Finished difference Result 751 states and 837 transitions. [2019-10-13 23:17:06,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:17:06,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-13 23:17:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:06,912 INFO L225 Difference]: With dead ends: 751 [2019-10-13 23:17:06,913 INFO L226 Difference]: Without dead ends: 748 [2019-10-13 23:17:06,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 23:17:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-13 23:17:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 736. [2019-10-13 23:17:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-10-13 23:17:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 819 transitions. [2019-10-13 23:17:06,993 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 819 transitions. Word has length 120 [2019-10-13 23:17:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:06,995 INFO L462 AbstractCegarLoop]: Abstraction has 736 states and 819 transitions. [2019-10-13 23:17:06,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 819 transitions. [2019-10-13 23:17:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 23:17:07,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:07,003 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:07,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:07,216 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:07,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1126573936, now seen corresponding path program 1 times [2019-10-13 23:17:07,216 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:07,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632728725] [2019-10-13 23:17:07,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:17:07,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632728725] [2019-10-13 23:17:07,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106935273] [2019-10-13 23:17:07,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:07,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:17:07,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:07,621 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:17:07,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:07,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 8 [2019-10-13 23:17:07,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895105842] [2019-10-13 23:17:07,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:17:07,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:17:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:07,834 INFO L87 Difference]: Start difference. First operand 736 states and 819 transitions. Second operand 3 states. [2019-10-13 23:17:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:07,918 INFO L93 Difference]: Finished difference Result 1450 states and 1616 transitions. [2019-10-13 23:17:07,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:17:07,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-10-13 23:17:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:07,923 INFO L225 Difference]: With dead ends: 1450 [2019-10-13 23:17:07,923 INFO L226 Difference]: Without dead ends: 736 [2019-10-13 23:17:07,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-13 23:17:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 670. [2019-10-13 23:17:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-10-13 23:17:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 715 transitions. [2019-10-13 23:17:07,961 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 715 transitions. Word has length 127 [2019-10-13 23:17:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:07,961 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 715 transitions. [2019-10-13 23:17:07,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:17:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 715 transitions. [2019-10-13 23:17:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 23:17:07,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:07,964 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:08,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:08,170 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1528462586, now seen corresponding path program 1 times [2019-10-13 23:17:08,171 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:08,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556523468] [2019-10-13 23:17:08,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:17:08,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556523468] [2019-10-13 23:17:08,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:08,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-13 23:17:08,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443036135] [2019-10-13 23:17:08,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:08,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:08,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:17:08,426 INFO L87 Difference]: Start difference. First operand 670 states and 715 transitions. Second operand 14 states. [2019-10-13 23:17:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:08,768 INFO L93 Difference]: Finished difference Result 1052 states and 1144 transitions. [2019-10-13 23:17:08,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:17:08,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2019-10-13 23:17:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:08,772 INFO L225 Difference]: With dead ends: 1052 [2019-10-13 23:17:08,772 INFO L226 Difference]: Without dead ends: 706 [2019-10-13 23:17:08,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:17:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-13 23:17:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 660. [2019-10-13 23:17:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 23:17:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 701 transitions. [2019-10-13 23:17:08,808 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 701 transitions. Word has length 127 [2019-10-13 23:17:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:08,808 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 701 transitions. [2019-10-13 23:17:08,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 701 transitions. [2019-10-13 23:17:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:17:08,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:08,811 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:08,812 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2106525878, now seen corresponding path program 1 times [2019-10-13 23:17:08,812 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:08,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653269940] [2019-10-13 23:17:08,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:17:09,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653269940] [2019-10-13 23:17:09,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088862885] [2019-10-13 23:17:09,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:09,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 23:17:09,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:09,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:09,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:09,611 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:10,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:17:11,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:11,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14, 13] total 35 [2019-10-13 23:17:11,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968976793] [2019-10-13 23:17:11,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:11,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 23:17:11,383 INFO L87 Difference]: Start difference. First operand 660 states and 701 transitions. Second operand 14 states. [2019-10-13 23:17:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:13,402 INFO L93 Difference]: Finished difference Result 1236 states and 1354 transitions. [2019-10-13 23:17:13,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 23:17:13,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-13 23:17:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:13,409 INFO L225 Difference]: With dead ends: 1236 [2019-10-13 23:17:13,410 INFO L226 Difference]: Without dead ends: 820 [2019-10-13 23:17:13,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 243 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 23:17:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-10-13 23:17:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 776. [2019-10-13 23:17:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2019-10-13 23:17:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 841 transitions. [2019-10-13 23:17:13,513 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 841 transitions. Word has length 133 [2019-10-13 23:17:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:13,514 INFO L462 AbstractCegarLoop]: Abstraction has 776 states and 841 transitions. [2019-10-13 23:17:13,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 841 transitions. [2019-10-13 23:17:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 23:17:13,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:13,517 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:13,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:13,727 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1047856765, now seen corresponding path program 1 times [2019-10-13 23:17:13,728 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:13,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979461196] [2019-10-13 23:17:13,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:13,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:13,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:17:13,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979461196] [2019-10-13 23:17:13,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761849979] [2019-10-13 23:17:13,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:14,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-13 23:17:14,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:14,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:14,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:14,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:14,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:14,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:14,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:15,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:15,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:15,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:17:15,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991018500] [2019-10-13 23:17:15,215 INFO L162 IcfgInterpreter]: Started Sifa with 107 locations of interest [2019-10-13 23:17:15,216 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:17:15,222 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:17:15,230 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:17:15,231 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:17:23,034 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-13 23:17:24,651 WARN L191 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:17:24,829 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:24,962 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:25,087 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:25,330 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:25,569 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:25,767 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:25,992 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:26,326 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 540 [2019-10-13 23:17:26,468 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:26,627 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:26,787 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:26,893 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:27,007 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-13 23:17:27,236 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 542 for LOIs [2019-10-13 23:17:27,374 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:27,483 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:27,621 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:27,958 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:28,106 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:28,316 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:28,574 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 542 [2019-10-13 23:17:28,683 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:28,829 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:29,142 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:29,343 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:29,459 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:29,573 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:29,689 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:29,814 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:30,124 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:30,450 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:30,756 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,063 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,173 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:31,302 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:31,425 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,737 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:31,922 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,058 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,198 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,411 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-13 23:17:32,522 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,643 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,749 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,856 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:32,972 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:33,115 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:33,254 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:33,373 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:33,570 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:17:33,678 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:33,796 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:33,989 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:17:34,118 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:34,234 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:34,349 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-13 23:17:34,458 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-13 23:17:34,576 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:34,685 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:34,792 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:34,917 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:17:35,052 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:35,173 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:35,310 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:17:35,509 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 560 [2019-10-13 23:17:35,617 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:35,756 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:17:35,864 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:35,977 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:36,097 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:17:36,331 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-13 23:17:36,438 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:36,568 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:36,768 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-13 23:17:36,896 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,022 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,128 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,234 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,356 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,585 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 558