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_spec2_product58.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:15:37,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:15:37,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:15:37,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:15:37,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:15:37,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:15:37,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:15:37,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:15:37,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:15:37,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:15:37,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:15:37,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:15:37,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:15:37,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:15:37,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:15:37,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:15:37,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:15:37,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:15:37,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:15:37,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:15:37,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:15:37,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:15:37,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:15:37,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:15:37,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:15:37,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:15:37,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:15:37,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:15:37,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:15:37,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:15:37,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:15:37,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:15:37,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:15:37,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:15:37,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:15:37,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:15:37,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:15:37,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:15:37,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:15:37,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:15:37,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:15:37,909 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 23:15:37,925 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:15:37,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:15:37,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:15:37,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:15:37,927 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:15:37,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:15:37,927 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:15:37,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:15:37,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:15:37,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:15:37,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:15:37,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:15:37,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:15:37,930 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:15:37,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:15:37,930 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:15:37,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:15:37,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:15:37,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:15:37,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:15:37,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:15:37,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:15:37,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:15:37,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:15:37,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:15:37,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:15:37,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:15:37,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:15:37,934 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 23:15:38,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:15:38,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:15:38,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:15:38,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:15:38,249 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:15:38,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product58.cil.c [2019-10-13 23:15:38,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58eeec934/1ae9a56f96dd41fb85c1969cee4d878a/FLAG2acd5cddf [2019-10-13 23:15:38,886 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:15:38,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec2_product58.cil.c [2019-10-13 23:15:38,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58eeec934/1ae9a56f96dd41fb85c1969cee4d878a/FLAG2acd5cddf [2019-10-13 23:15:39,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58eeec934/1ae9a56f96dd41fb85c1969cee4d878a [2019-10-13 23:15:39,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:15:39,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:15:39,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:15:39,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:15:39,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:15:39,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:39,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c84b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39, skipping insertion in model container [2019-10-13 23:15:39,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:39,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:15:39,330 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:15:39,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:15:39,763 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:15:39,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:15:39,967 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:15:39,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39 WrapperNode [2019-10-13 23:15:39,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:15:39,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:15:39,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:15:39,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:15:39,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:39,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (1/1) ... [2019-10-13 23:15:40,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:15:40,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:15:40,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:15:40,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:15:40,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (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 23:15:40,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:15:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:15:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:15:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:15:40,170 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:15:40,172 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:15:40,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:15:40,172 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:15:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:15:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:15:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 23:15:40,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:15:40,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:15:40,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:15:40,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:15:40,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:15:40,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:15:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:15:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:15:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:15:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:15:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:15:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:15:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:15:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 23:15:40,180 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-13 23:15:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-13 23:15:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-13 23:15:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:15:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:15:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:15:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:15:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:15:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:15:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:15:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:15:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:15:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:15:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:15:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:15:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:15:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:15:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:15:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:15:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:15:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:15:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:15:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:15:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 23:15:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:15:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:15:40,188 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:15:40,188 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:15:40,188 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:15:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:15:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:15:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:15:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:15:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:15:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:15:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:15:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:15:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:15:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:15:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:15:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:15:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-13 23:15:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:15:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:15:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:15:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:15:40,193 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:15:40,193 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:15:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:15:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 23:15:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:15:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:15:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:15:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:15:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:15:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:15:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:15:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:15:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:15:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:15:41,969 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:15:41,970 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:15:41,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:15:41 BoogieIcfgContainer [2019-10-13 23:15:41,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:15:41,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:15:41,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:15:41,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:15:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:15:39" (1/3) ... [2019-10-13 23:15:41,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9fb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:15:41, skipping insertion in model container [2019-10-13 23:15:41,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:15:39" (2/3) ... [2019-10-13 23:15:41,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9fb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:15:41, skipping insertion in model container [2019-10-13 23:15:41,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:15:41" (3/3) ... [2019-10-13 23:15:41,982 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product58.cil.c [2019-10-13 23:15:41,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:15:42,009 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:15:42,020 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:15:42,061 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:15:42,061 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:15:42,061 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:15:42,061 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:15:42,062 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:15:42,062 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:15:42,063 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:15:42,063 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:15:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-13 23:15:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 23:15:42,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:42,110 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 23:15:42,113 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1478823579, now seen corresponding path program 1 times [2019-10-13 23:15:42,130 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:42,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851836876] [2019-10-13 23:15:42,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:42,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:42,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:42,563 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 23:15:42,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851836876] [2019-10-13 23:15:42,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:42,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:15:42,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867962673] [2019-10-13 23:15:42,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:15:42,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:15:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:15:42,604 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 2 states. [2019-10-13 23:15:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:42,697 INFO L93 Difference]: Finished difference Result 246 states and 295 transitions. [2019-10-13 23:15:42,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:15:42,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2019-10-13 23:15:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:42,725 INFO L225 Difference]: With dead ends: 246 [2019-10-13 23:15:42,725 INFO L226 Difference]: Without dead ends: 125 [2019-10-13 23:15:42,740 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 23:15:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-13 23:15:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-13 23:15:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 23:15:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2019-10-13 23:15:42,835 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 46 [2019-10-13 23:15:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:42,835 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2019-10-13 23:15:42,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:15:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2019-10-13 23:15:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 23:15:42,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:42,842 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] [2019-10-13 23:15:42,843 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 946761388, now seen corresponding path program 1 times [2019-10-13 23:15:42,844 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:42,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303779796] [2019-10-13 23:15:42,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:42,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:42,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:43,002 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 23:15:43,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303779796] [2019-10-13 23:15:43,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:43,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:15:43,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807075176] [2019-10-13 23:15:43,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:15:43,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:15:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:15:43,009 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 3 states. [2019-10-13 23:15:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:43,049 INFO L93 Difference]: Finished difference Result 200 states and 229 transitions. [2019-10-13 23:15:43,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:15:43,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-10-13 23:15:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:43,054 INFO L225 Difference]: With dead ends: 200 [2019-10-13 23:15:43,055 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 23:15:43,059 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 23:15:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 23:15:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-10-13 23:15:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 23:15:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2019-10-13 23:15:43,087 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 47 [2019-10-13 23:15:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:43,088 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2019-10-13 23:15:43,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:15:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2019-10-13 23:15:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 23:15:43,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:43,097 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] [2019-10-13 23:15:43,097 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1418644644, now seen corresponding path program 1 times [2019-10-13 23:15:43,098 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:43,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292386456] [2019-10-13 23:15:43,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:43,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:43,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:43,322 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 23:15:43,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292386456] [2019-10-13 23:15:43,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:43,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:15:43,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672962974] [2019-10-13 23:15:43,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:15:43,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:43,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:15:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:15:43,325 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand 7 states. [2019-10-13 23:15:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:43,654 INFO L93 Difference]: Finished difference Result 209 states and 240 transitions. [2019-10-13 23:15:43,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:15:43,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 23:15:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:43,656 INFO L225 Difference]: With dead ends: 209 [2019-10-13 23:15:43,656 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 23:15:43,657 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 23:15:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 23:15:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-10-13 23:15:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 23:15:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-10-13 23:15:43,669 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 50 [2019-10-13 23:15:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:43,670 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-10-13 23:15:43,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:15:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-10-13 23:15:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:15:43,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:43,672 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 23:15:43,672 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:43,672 INFO L82 PathProgramCache]: Analyzing trace with hash -115851954, now seen corresponding path program 1 times [2019-10-13 23:15:43,673 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:43,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403685307] [2019-10-13 23:15:43,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:43,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:43,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:43,795 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 23:15:43,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403685307] [2019-10-13 23:15:43,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:43,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:15:43,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141883640] [2019-10-13 23:15:43,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:15:43,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:15:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:15:43,798 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 5 states. [2019-10-13 23:15:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:44,305 INFO L93 Difference]: Finished difference Result 301 states and 355 transitions. [2019-10-13 23:15:44,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:15:44,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 23:15:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:44,309 INFO L225 Difference]: With dead ends: 301 [2019-10-13 23:15:44,309 INFO L226 Difference]: Without dead ends: 209 [2019-10-13 23:15:44,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 23:15:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-10-13 23:15:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2019-10-13 23:15:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-10-13 23:15:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 214 transitions. [2019-10-13 23:15:44,357 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 214 transitions. Word has length 63 [2019-10-13 23:15:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:44,358 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 214 transitions. [2019-10-13 23:15:44,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:15:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 214 transitions. [2019-10-13 23:15:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:15:44,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:44,361 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] [2019-10-13 23:15:44,361 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash 883460444, now seen corresponding path program 1 times [2019-10-13 23:15:44,362 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:44,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669589635] [2019-10-13 23:15:44,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:44,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:44,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:44,488 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 23:15:44,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669589635] [2019-10-13 23:15:44,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:44,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 23:15:44,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128879017] [2019-10-13 23:15:44,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:15:44,490 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:44,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:15:44,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:15:44,491 INFO L87 Difference]: Start difference. First operand 192 states and 214 transitions. Second operand 6 states. [2019-10-13 23:15:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:44,686 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2019-10-13 23:15:44,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:15:44,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-13 23:15:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:44,690 INFO L225 Difference]: With dead ends: 509 [2019-10-13 23:15:44,691 INFO L226 Difference]: Without dead ends: 342 [2019-10-13 23:15:44,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:15:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-10-13 23:15:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 332. [2019-10-13 23:15:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2019-10-13 23:15:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 368 transitions. [2019-10-13 23:15:44,741 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 368 transitions. Word has length 72 [2019-10-13 23:15:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:44,742 INFO L462 AbstractCegarLoop]: Abstraction has 332 states and 368 transitions. [2019-10-13 23:15:44,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:15:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 368 transitions. [2019-10-13 23:15:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 23:15:44,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:44,744 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, 1, 1] [2019-10-13 23:15:44,744 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 845753340, now seen corresponding path program 1 times [2019-10-13 23:15:44,745 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:44,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379014049] [2019-10-13 23:15:44,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:44,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:44,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:44,880 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 23:15:44,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379014049] [2019-10-13 23:15:44,882 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:15:44,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:15:44,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629414261] [2019-10-13 23:15:44,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:15:44,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:15:44,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:15:44,886 INFO L87 Difference]: Start difference. First operand 332 states and 368 transitions. Second operand 7 states. [2019-10-13 23:15:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:45,484 INFO L93 Difference]: Finished difference Result 525 states and 604 transitions. [2019-10-13 23:15:45,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 23:15:45,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2019-10-13 23:15:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:45,488 INFO L225 Difference]: With dead ends: 525 [2019-10-13 23:15:45,489 INFO L226 Difference]: Without dead ends: 358 [2019-10-13 23:15:45,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:15:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-10-13 23:15:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 331. [2019-10-13 23:15:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2019-10-13 23:15:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 365 transitions. [2019-10-13 23:15:45,512 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 365 transitions. Word has length 75 [2019-10-13 23:15:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:45,513 INFO L462 AbstractCegarLoop]: Abstraction has 331 states and 365 transitions. [2019-10-13 23:15:45,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:15:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 365 transitions. [2019-10-13 23:15:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:15:45,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:45,515 INFO L380 BasicCegarLoop]: trace histogram [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 23:15:45,515 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1405283872, now seen corresponding path program 1 times [2019-10-13 23:15:45,516 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:45,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712854124] [2019-10-13 23:15:45,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:45,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:45,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:15:45,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712854124] [2019-10-13 23:15:45,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424210889] [2019-10-13 23:15:45,678 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 23:15:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:45,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 23:15:45,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:15:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:15:45,964 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:15:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:15:46,088 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:15:46,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 15 [2019-10-13 23:15:46,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044121291] [2019-10-13 23:15:46,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:15:46,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:15:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:15:46,092 INFO L87 Difference]: Start difference. First operand 331 states and 365 transitions. Second operand 3 states. [2019-10-13 23:15:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:46,143 INFO L93 Difference]: Finished difference Result 473 states and 534 transitions. [2019-10-13 23:15:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:15:46,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-13 23:15:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:46,150 INFO L225 Difference]: With dead ends: 473 [2019-10-13 23:15:46,150 INFO L226 Difference]: Without dead ends: 470 [2019-10-13 23:15:46,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:15:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-13 23:15:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 463. [2019-10-13 23:15:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-13 23:15:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 522 transitions. [2019-10-13 23:15:46,205 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 522 transitions. Word has length 88 [2019-10-13 23:15:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:46,208 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 522 transitions. [2019-10-13 23:15:46,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:15:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 522 transitions. [2019-10-13 23:15:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:15:46,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:46,219 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:46,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:15:46,426 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1315830805, now seen corresponding path program 1 times [2019-10-13 23:15:46,427 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:46,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203472499] [2019-10-13 23:15:46,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:46,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:46,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:15:46,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203472499] [2019-10-13 23:15:46,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351829403] [2019-10-13 23:15:46,684 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 23:15:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:46,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 23:15:46,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:15:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:15:46,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:15:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:15:47,759 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:15:47,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14, 12] total 25 [2019-10-13 23:15:47,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482246612] [2019-10-13 23:15:47,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:15:47,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:15:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2019-10-13 23:15:47,764 INFO L87 Difference]: Start difference. First operand 463 states and 522 transitions. Second operand 11 states. [2019-10-13 23:15:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:48,672 INFO L93 Difference]: Finished difference Result 1005 states and 1170 transitions. [2019-10-13 23:15:48,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:15:48,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 140 [2019-10-13 23:15:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:48,677 INFO L225 Difference]: With dead ends: 1005 [2019-10-13 23:15:48,677 INFO L226 Difference]: Without dead ends: 567 [2019-10-13 23:15:48,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2019-10-13 23:15:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2019-10-13 23:15:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2019-10-13 23:15:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-13 23:15:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 622 transitions. [2019-10-13 23:15:48,711 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 622 transitions. Word has length 140 [2019-10-13 23:15:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:48,712 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 622 transitions. [2019-10-13 23:15:48,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:15:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 622 transitions. [2019-10-13 23:15:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 23:15:48,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:48,720 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:48,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:15:48,925 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1438529546, now seen corresponding path program 1 times [2019-10-13 23:15:48,926 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:48,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130876926] [2019-10-13 23:15:48,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:48,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:48,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-10-13 23:15:49,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130876926] [2019-10-13 23:15:49,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223249537] [2019-10-13 23:15:49,283 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 23:15:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:49,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 23:15:49,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:15:49,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:49,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 23:15:49,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:15:50,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:51,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:51,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:51,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-10-13 23:15:51,622 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:15:51,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14, 13] total 35 [2019-10-13 23:15:51,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488989593] [2019-10-13 23:15:51,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:15:51,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:15:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:15:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 23:15:51,625 INFO L87 Difference]: Start difference. First operand 556 states and 622 transitions. Second operand 14 states. [2019-10-13 23:15:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:15:53,943 INFO L93 Difference]: Finished difference Result 1379 states and 1613 transitions. [2019-10-13 23:15:53,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 23:15:53,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 186 [2019-10-13 23:15:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:15:53,949 INFO L225 Difference]: With dead ends: 1379 [2019-10-13 23:15:53,950 INFO L226 Difference]: Without dead ends: 848 [2019-10-13 23:15:53,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 349 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=2476, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 23:15:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-10-13 23:15:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 805. [2019-10-13 23:15:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-10-13 23:15:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 921 transitions. [2019-10-13 23:15:54,013 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 921 transitions. Word has length 186 [2019-10-13 23:15:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:15:54,013 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 921 transitions. [2019-10-13 23:15:54,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:15:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 921 transitions. [2019-10-13 23:15:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 23:15:54,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:15:54,019 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:54,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:15:54,253 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:15:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:15:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1963195477, now seen corresponding path program 1 times [2019-10-13 23:15:54,255 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:15:54,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65948461] [2019-10-13 23:15:54,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:54,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:15:54,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:15:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 23:15:54,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65948461] [2019-10-13 23:15:54,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924795101] [2019-10-13 23:15:54,660 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 23:15:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:15:54,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-13 23:15:54,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:15:55,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:55,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:55,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 92 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:15:55,291 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:15:55,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:55,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:55,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:15:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 23:15:56,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726415911] [2019-10-13 23:15:56,788 INFO L162 IcfgInterpreter]: Started Sifa with 110 locations of interest [2019-10-13 23:15:56,788 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:15:56,795 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:15:56,801 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:15:56,801 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:16:04,461 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 466 [2019-10-13 23:16:06,180 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:16:06,306 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:16:06,432 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:16:06,548 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:16:06,869 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:07,053 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:07,218 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:07,362 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:07,699 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 544 [2019-10-13 23:16:07,838 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:07,988 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:08,093 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:08,236 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:08,356 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:16:08,364 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2019-10-13 23:16:08,516 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 443 [2019-10-13 23:16:08,711 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 513 [2019-10-13 23:16:08,712 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 550 for LOIs [2019-10-13 23:16:08,864 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:08,988 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:09,115 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:09,289 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:09,408 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:09,549 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:09,668 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:09,774 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:09,915 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:10,187 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 550 [2019-10-13 23:16:10,298 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:10,457 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:10,575 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:10,680 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:10,811 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:10,938 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,045 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,171 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:11,275 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,380 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,514 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:11,621 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,742 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:11,894 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:12,000 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,109 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,235 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:12,340 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,447 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,574 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:12,704 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,819 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:12,953 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:13,058 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:13,169 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:13,297 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:13,402 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:13,508 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 550 [2019-10-13 23:16:13,650 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:13,906 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,092 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,220 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,441 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 564 [2019-10-13 23:16:14,564 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,699 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,813 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:14,946 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:15,070 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:15,217 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:15,333 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:15,466 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:15,705 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 568 [2019-10-13 23:16:15,824 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,053 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,211 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,328 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,457 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,575 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:16:16,692 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:16:16,826 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:16,944 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:17,060 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:17,191 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 570 [2019-10-13 23:16:17,344 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:17,464 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:17,601 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 570 [2019-10-13 23:16:17,862 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 568 [2019-10-13 23:16:17,978 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:18,114 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 570 [2019-10-13 23:16:18,230 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:18,349 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 568 [2019-10-13 23:16:18,476 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 570 [2019-10-13 23:16:18,744 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 564 [2019-10-13 23:16:18,860 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:16:18,989 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 564