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_product62.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:17:03,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:17:03,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:17:03,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:17:03,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:17:03,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:17:03,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:17:03,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:17:03,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:17:03,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:17:03,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:17:03,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:17:03,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:17:03,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:17:03,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:17:03,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:17:03,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:17:03,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:17:03,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:17:03,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:17:03,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:17:03,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:17:03,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:17:03,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:17:03,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:17:03,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:17:03,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:17:03,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:17:03,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:17:03,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:17:03,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:17:03,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:17:03,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:17:03,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:17:03,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:17:03,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:17:03,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:17:03,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:17:03,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:17:03,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:17:03,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:17:03,858 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 23:17:03,874 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:17:03,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:17:03,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:17:03,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:17:03,876 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:17:03,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:17:03,876 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:17:03,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:17:03,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:17:03,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:17:03,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:17:03,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:17:03,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:17:03,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:17:03,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:17:03,878 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:17:03,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:17:03,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:17:03,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:17:03,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:17:03,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:17:03,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:17:03,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:17:03,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:17:03,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:17:03,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:17:03,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:17:03,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:17:03,881 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 23:17:04,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:17:04,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:17:04,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:17:04,215 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:17:04,215 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:17:04,216 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product62.cil.c [2019-10-13 23:17:04,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14251eb78/d3a52dc638cf41e5b612114c26d8fbdf/FLAG840863be7 [2019-10-13 23:17:04,841 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:17:04,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product62.cil.c [2019-10-13 23:17:04,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14251eb78/d3a52dc638cf41e5b612114c26d8fbdf/FLAG840863be7 [2019-10-13 23:17:05,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14251eb78/d3a52dc638cf41e5b612114c26d8fbdf [2019-10-13 23:17:05,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:17:05,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:17:05,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:17:05,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:17:05,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:17:05,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d5fb82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05, skipping insertion in model container [2019-10-13 23:17:05,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,154 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:17:05,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:17:05,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:17:05,677 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:17:05,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:17:05,819 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:17:05,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05 WrapperNode [2019-10-13 23:17:05,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:17:05,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:17:05,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:17:05,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:17:05,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (1/1) ... [2019-10-13 23:17:05,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:17:05,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:17:05,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:17:05,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:17:05,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (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 23:17:05,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:17:05,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:17:05,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:17:05,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:17:05,982 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:17:05,983 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:17:05,984 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:17:05,984 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:17:05,984 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-10-13 23:17:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:17:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:17:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:17:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:17:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:17:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:17:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:17:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:17:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 23:17:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-13 23:17:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:17:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:17:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:17:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:17:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:17:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:17:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:17:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:17:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:17:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:17:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:17:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:17:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:17:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:17:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:17:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:17:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:17:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:17:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 23:17:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:17:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:17:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:17:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:17:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:17:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:17:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:17:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:17:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:17:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 23:17:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:17:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:17:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:17:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:17:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:17:06,004 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:17:06,004 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:17:06,005 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:17:06,005 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:17:06,005 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:17:06,005 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:17:06,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:17:06,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:17:06,006 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:17:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:17:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:17:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:17:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:17:06,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:17:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:17:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:17:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:17:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:17:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:17:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:17:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:17:07,723 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:17:07,723 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:17:07,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:07 BoogieIcfgContainer [2019-10-13 23:17:07,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:17:07,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:17:07,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:17:07,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:17:07,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:17:05" (1/3) ... [2019-10-13 23:17:07,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652f8331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:07, skipping insertion in model container [2019-10-13 23:17:07,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:05" (2/3) ... [2019-10-13 23:17:07,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652f8331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:07, skipping insertion in model container [2019-10-13 23:17:07,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:07" (3/3) ... [2019-10-13 23:17:07,733 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product62.cil.c [2019-10-13 23:17:07,743 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:17:07,752 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:17:07,763 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:17:07,799 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:17:07,799 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:17:07,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:17:07,799 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:17:07,800 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:17:07,800 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:17:07,800 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:17:07,801 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:17:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2019-10-13 23:17:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 23:17:07,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:07,851 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 23:17:07,855 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash -181766063, now seen corresponding path program 1 times [2019-10-13 23:17:07,871 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:07,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007545086] [2019-10-13 23:17:07,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,195 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 23:17:08,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007545086] [2019-10-13 23:17:08,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:08,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:17:08,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465598178] [2019-10-13 23:17:08,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:17:08,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:17:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:17:08,219 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 2 states. [2019-10-13 23:17:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:08,263 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2019-10-13 23:17:08,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:17:08,265 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-13 23:17:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:08,282 INFO L225 Difference]: With dead ends: 265 [2019-10-13 23:17:08,283 INFO L226 Difference]: Without dead ends: 133 [2019-10-13 23:17:08,288 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 23:17:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-13 23:17:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-10-13 23:17:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-13 23:17:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2019-10-13 23:17:08,351 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 42 [2019-10-13 23:17:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:08,351 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2019-10-13 23:17:08,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:17:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2019-10-13 23:17:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 23:17:08,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:08,356 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 23:17:08,356 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash -579616042, now seen corresponding path program 1 times [2019-10-13 23:17:08,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:08,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002352203] [2019-10-13 23:17:08,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,534 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 23:17:08,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002352203] [2019-10-13 23:17:08,535 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:08,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:17:08,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206763294] [2019-10-13 23:17:08,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:17:08,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:08,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:17:08,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:17:08,539 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 3 states. [2019-10-13 23:17:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:08,585 INFO L93 Difference]: Finished difference Result 219 states and 254 transitions. [2019-10-13 23:17:08,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:17:08,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-13 23:17:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:08,592 INFO L225 Difference]: With dead ends: 219 [2019-10-13 23:17:08,593 INFO L226 Difference]: Without dead ends: 125 [2019-10-13 23:17:08,596 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 23:17:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-13 23:17:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-13 23:17:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 23:17:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2019-10-13 23:17:08,631 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 43 [2019-10-13 23:17:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:08,632 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2019-10-13 23:17:08,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:17:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2019-10-13 23:17:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 23:17:08,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:08,635 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 23:17:08,635 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -741704379, now seen corresponding path program 1 times [2019-10-13 23:17:08,636 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:08,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88560442] [2019-10-13 23:17:08,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,819 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 23:17:08,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88560442] [2019-10-13 23:17:08,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:08,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:17:08,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898021058] [2019-10-13 23:17:08,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:08,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:08,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:08,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:17:08,821 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 7 states. [2019-10-13 23:17:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:09,184 INFO L93 Difference]: Finished difference Result 228 states and 265 transitions. [2019-10-13 23:17:09,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:17:09,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-13 23:17:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:09,187 INFO L225 Difference]: With dead ends: 228 [2019-10-13 23:17:09,187 INFO L226 Difference]: Without dead ends: 125 [2019-10-13 23:17:09,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-13 23:17:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-13 23:17:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 23:17:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2019-10-13 23:17:09,214 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 46 [2019-10-13 23:17:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:09,215 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2019-10-13 23:17:09,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2019-10-13 23:17:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:17:09,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:09,224 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 23:17:09,225 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1156525635, now seen corresponding path program 1 times [2019-10-13 23:17:09,225 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:09,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719413263] [2019-10-13 23:17:09,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:09,347 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 23:17:09,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719413263] [2019-10-13 23:17:09,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:09,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:17:09,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777381806] [2019-10-13 23:17:09,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:17:09,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:17:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:17:09,350 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand 5 states. [2019-10-13 23:17:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:09,898 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2019-10-13 23:17:09,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:17:09,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 23:17:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:09,903 INFO L225 Difference]: With dead ends: 332 [2019-10-13 23:17:09,903 INFO L226 Difference]: Without dead ends: 229 [2019-10-13 23:17:09,904 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 23:17:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-10-13 23:17:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2019-10-13 23:17:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-13 23:17:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2019-10-13 23:17:09,942 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 63 [2019-10-13 23:17:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:09,943 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2019-10-13 23:17:09,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:17:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2019-10-13 23:17:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 23:17:09,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:09,945 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 23:17:09,945 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1819528347, now seen corresponding path program 1 times [2019-10-13 23:17:09,946 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:09,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675062537] [2019-10-13 23:17:09,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:10,089 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 23:17:10,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675062537] [2019-10-13 23:17:10,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:10,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:17:10,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132852639] [2019-10-13 23:17:10,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:17:10,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:10,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:17:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:10,092 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand 10 states. [2019-10-13 23:17:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:10,612 INFO L93 Difference]: Finished difference Result 630 states and 717 transitions. [2019-10-13 23:17:10,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:17:10,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-10-13 23:17:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:10,618 INFO L225 Difference]: With dead ends: 630 [2019-10-13 23:17:10,618 INFO L226 Difference]: Without dead ends: 440 [2019-10-13 23:17:10,619 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 23:17:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-10-13 23:17:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2019-10-13 23:17:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 23:17:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 472 transitions. [2019-10-13 23:17:10,666 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 472 transitions. Word has length 73 [2019-10-13 23:17:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:10,667 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 472 transitions. [2019-10-13 23:17:10,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:17:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 472 transitions. [2019-10-13 23:17:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 23:17:10,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:10,672 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] [2019-10-13 23:17:10,672 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1345221674, now seen corresponding path program 1 times [2019-10-13 23:17:10,673 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:10,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004909139] [2019-10-13 23:17:10,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:10,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:10,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:17:11,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004909139] [2019-10-13 23:17:11,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232532748] [2019-10-13 23:17:11,228 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 23:17:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:11,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:17:11,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:17:11,692 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 23:17:12,171 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:12,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [15] total 27 [2019-10-13 23:17:12,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718249085] [2019-10-13 23:17:12,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:12,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-13 23:17:12,174 INFO L87 Difference]: Start difference. First operand 426 states and 472 transitions. Second operand 14 states. [2019-10-13 23:17:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:13,288 INFO L93 Difference]: Finished difference Result 1019 states and 1134 transitions. [2019-10-13 23:17:13,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:17:13,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2019-10-13 23:17:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:13,295 INFO L225 Difference]: With dead ends: 1019 [2019-10-13 23:17:13,295 INFO L226 Difference]: Without dead ends: 829 [2019-10-13 23:17:13,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-13 23:17:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2019-10-13 23:17:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 826. [2019-10-13 23:17:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-13 23:17:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 917 transitions. [2019-10-13 23:17:13,353 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 917 transitions. Word has length 130 [2019-10-13 23:17:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:13,354 INFO L462 AbstractCegarLoop]: Abstraction has 826 states and 917 transitions. [2019-10-13 23:17:13,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 917 transitions. [2019-10-13 23:17:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 23:17:13,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:13,358 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 23:17:13,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:13,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash -574104665, now seen corresponding path program 1 times [2019-10-13 23:17:13,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:13,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147443591] [2019-10-13 23:17:13,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:13,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:13,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 23:17:13,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147443591] [2019-10-13 23:17:13,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925761359] [2019-10-13 23:17:13,727 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 23:17:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:13,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:17:13,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:17:13,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 23:17:14,205 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:14,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2019-10-13 23:17:14,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420932381] [2019-10-13 23:17:14,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:14,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:17:14,207 INFO L87 Difference]: Start difference. First operand 826 states and 917 transitions. Second operand 7 states. [2019-10-13 23:17:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:14,454 INFO L93 Difference]: Finished difference Result 841 states and 933 transitions. [2019-10-13 23:17:14,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:17:14,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2019-10-13 23:17:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:14,469 INFO L225 Difference]: With dead ends: 841 [2019-10-13 23:17:14,469 INFO L226 Difference]: Without dead ends: 838 [2019-10-13 23:17:14,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:17:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2019-10-13 23:17:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 826. [2019-10-13 23:17:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-13 23:17:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 915 transitions. [2019-10-13 23:17:14,517 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 915 transitions. Word has length 127 [2019-10-13 23:17:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:14,518 INFO L462 AbstractCegarLoop]: Abstraction has 826 states and 915 transitions. [2019-10-13 23:17:14,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 915 transitions. [2019-10-13 23:17:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:17:14,522 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:14,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:14,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:14,736 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1546399480, now seen corresponding path program 1 times [2019-10-13 23:17:14,737 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:14,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916275742] [2019-10-13 23:17:14,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:14,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:14,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:15,049 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 23:17:15,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916275742] [2019-10-13 23:17:15,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:15,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-13 23:17:15,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880264451] [2019-10-13 23:17:15,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:15,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:15,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:15,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:17:15,056 INFO L87 Difference]: Start difference. First operand 826 states and 915 transitions. Second operand 14 states. [2019-10-13 23:17:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:15,538 INFO L93 Difference]: Finished difference Result 1482 states and 1718 transitions. [2019-10-13 23:17:15,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:17:15,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 140 [2019-10-13 23:17:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:15,551 INFO L225 Difference]: With dead ends: 1482 [2019-10-13 23:17:15,551 INFO L226 Difference]: Without dead ends: 1106 [2019-10-13 23:17:15,553 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 23:17:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2019-10-13 23:17:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 954. [2019-10-13 23:17:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2019-10-13 23:17:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1081 transitions. [2019-10-13 23:17:15,614 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1081 transitions. Word has length 140 [2019-10-13 23:17:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:15,616 INFO L462 AbstractCegarLoop]: Abstraction has 954 states and 1081 transitions. [2019-10-13 23:17:15,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1081 transitions. [2019-10-13 23:17:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 23:17:15,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:15,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:15,622 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash -746555623, now seen corresponding path program 1 times [2019-10-13 23:17:15,623 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:15,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263332460] [2019-10-13 23:17:15,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:15,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:15,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:17:15,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263332460] [2019-10-13 23:17:15,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621039794] [2019-10-13 23:17:15,911 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 23:17:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:16,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 23:17:16,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:16,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:16,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:16,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:16,534 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:17,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:17:18,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:18,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 13] total 36 [2019-10-13 23:17:18,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581221772] [2019-10-13 23:17:18,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:18,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:18,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 23:17:18,469 INFO L87 Difference]: Start difference. First operand 954 states and 1081 transitions. Second operand 14 states. [2019-10-13 23:17:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:20,796 INFO L93 Difference]: Finished difference Result 2138 states and 2546 transitions. [2019-10-13 23:17:20,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 23:17:20,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2019-10-13 23:17:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:20,804 INFO L225 Difference]: With dead ends: 2138 [2019-10-13 23:17:20,804 INFO L226 Difference]: Without dead ends: 1206 [2019-10-13 23:17:20,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 275 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2019-10-13 23:17:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2019-10-13 23:17:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1112. [2019-10-13 23:17:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 23:17:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1265 transitions. [2019-10-13 23:17:20,873 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1265 transitions. Word has length 149 [2019-10-13 23:17:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:20,874 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1265 transitions. [2019-10-13 23:17:20,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1265 transitions. [2019-10-13 23:17:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 23:17:20,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:20,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:21,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:21,084 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -612259877, now seen corresponding path program 1 times [2019-10-13 23:17:21,086 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:21,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919466637] [2019-10-13 23:17:21,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:21,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:21,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:17:21,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919466637] [2019-10-13 23:17:21,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479552194] [2019-10-13 23:17:21,338 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 23:17:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:21,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-13 23:17:21,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:21,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:21,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:17:21,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:22,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:17:22,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842529299] [2019-10-13 23:17:22,969 INFO L162 IcfgInterpreter]: Started Sifa with 114 locations of interest [2019-10-13 23:17:22,970 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:17:22,976 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:17:22,984 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:17:22,984 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:17:32,284 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-13 23:17:33,765 WARN L191 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:17:33,893 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:34,026 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:34,174 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:34,521 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:34,759 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:34,954 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:35,177 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:35,440 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:35,656 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:35,860 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:35,979 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:36,093 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:36,243 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:36,251 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-13 23:17:36,555 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 509 [2019-10-13 23:17:36,556 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 544 for LOIs [2019-10-13 23:17:36,669 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:36,779 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:36,914 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,075 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:37,191 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:37,327 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,460 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:37,702 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,952 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 544 [2019-10-13 23:17:38,167 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:38,285 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:38,396 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:38,541 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:38,849 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:39,180 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:39,491 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:39,801 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:39,918 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:40,039 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:17:40,153 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:40,464 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:40,797 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,107 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,231 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,337 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,479 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,596 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,752 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,873 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:41,981 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:42,088 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:42,202 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:42,347 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:42,479 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:42,613 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:42,846 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:17:42,958 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:43,151 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:43,348 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:17:43,459 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:43,580 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:43,697 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-13 23:17:43,830 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-13 23:17:43,950 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:44,061 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:44,170 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:44,292 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:17:44,413 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:44,522 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:17:44,642 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 562