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/elevator_spec13_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:05:44,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:05:44,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:05:44,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:05:44,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:05:44,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:05:44,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:05:44,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:05:44,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:05:44,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:05:44,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:05:44,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:05:44,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:05:44,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:05:44,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:05:44,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:05:44,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:05:44,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:05:44,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:05:44,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:05:44,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:05:44,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:05:44,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:05:44,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:05:44,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:05:44,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:05:44,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:05:44,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:05:44,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:05:44,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:05:44,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:05:44,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:05:44,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:05:44,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:05:44,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:05:44,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:05:44,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:05:44,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:05:44,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:05:44,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:05:44,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:05:44,231 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 [2019-10-15 03:05:44,262 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:05:44,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:05:44,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:05:44,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:05:44,264 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:05:44,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:05:44,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:05:44,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:05:44,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:05:44,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:05:44,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:05:44,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:05:44,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:05:44,266 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:05:44,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:05:44,267 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:05:44,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:05:44,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:05:44,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:05:44,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:05:44,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:05:44,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:05:44,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:05:44,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:05:44,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:05:44,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:05:44,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:05:44,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:05:44,271 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 [2019-10-15 03:05:44,604 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:05:44,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:05:44,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:05:44,627 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:05:44,627 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:05:44,631 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-15 03:05:44,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c1bd6a5/4812905baa864e6eb25e8ee4a50de4d0/FLAG046c28d69 [2019-10-15 03:05:45,561 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:05:45,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-15 03:05:45,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c1bd6a5/4812905baa864e6eb25e8ee4a50de4d0/FLAG046c28d69 [2019-10-15 03:05:45,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c1bd6a5/4812905baa864e6eb25e8ee4a50de4d0 [2019-10-15 03:05:45,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:05:45,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:05:45,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:45,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:05:45,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:05:45,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:45" (1/1) ... [2019-10-15 03:05:45,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177ca94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:45, skipping insertion in model container [2019-10-15 03:05:45,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:45" (1/1) ... [2019-10-15 03:05:45,754 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:05:45,833 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:05:46,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:46,702 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:05:46,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:46,936 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:05:46,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46 WrapperNode [2019-10-15 03:05:46,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:46,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:05:46,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:05:46,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:05:46,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:46,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (1/1) ... [2019-10-15 03:05:47,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:05:47,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:05:47,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:05:47,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:05:47,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (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 [2019-10-15 03:05:47,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:05:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:05:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:05:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:05:47,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:47,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:47,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:47,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:05:47,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:05:47,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:05:47,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:05:47,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:05:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:05:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:05:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:05:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:05:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:05:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:05:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:05:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:05:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:05:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:05:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:05:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:05:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:05:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:05:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 03:05:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:05:47,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:05:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:05:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 03:05:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:05:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:05:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-15 03:05:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:05:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-15 03:05:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:05:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:05:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:05:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:05:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:05:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:05:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:05:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:05:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:05:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:05:47,320 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:05:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:05:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:05:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:05:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:05:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:05:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:05:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:05:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:05:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:05:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:05:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:05:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:05:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:05:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:05:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:05:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:05:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:05:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:05:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:05:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:05:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:05:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:05:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:05:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:05:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:05:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:05:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:05:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:05:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:05:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:05:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:05:47,332 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:05:47,333 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:05:47,334 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:05:47,334 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:05:47,334 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:05:47,334 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:05:47,334 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:05:47,335 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:05:47,335 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:05:47,335 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:05:47,335 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:05:47,335 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:05:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:05:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:05:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 03:05:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:05:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:05:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 03:05:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:05:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:05:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:05:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:05:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:05:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:05:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:05:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:05:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:05:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:05:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:05:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:05:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:05:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:05:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:05:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:05:53,502 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:05:53,503 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:05:53,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:53 BoogieIcfgContainer [2019-10-15 03:05:53,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:05:53,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:05:53,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:05:53,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:05:53,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:05:45" (1/3) ... [2019-10-15 03:05:53,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a643b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:53, skipping insertion in model container [2019-10-15 03:05:53,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:46" (2/3) ... [2019-10-15 03:05:53,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a643b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:53, skipping insertion in model container [2019-10-15 03:05:53,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:53" (3/3) ... [2019-10-15 03:05:53,515 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2019-10-15 03:05:53,526 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:05:53,536 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:05:53,548 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:05:53,584 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:05:53,585 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:05:53,585 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:05:53,585 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:05:53,585 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:05:53,585 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:05:53,585 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:05:53,585 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:05:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2019-10-15 03:05:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 03:05:53,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:05:53,642 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:05:53,644 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:05:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:05:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2001599510, now seen corresponding path program 1 times [2019-10-15 03:05:53,661 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:05:53,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531750347] [2019-10-15 03:05:53,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:53,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:53,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:05:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:05:54,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531750347] [2019-10-15 03:05:54,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358527519] [2019-10-15 03:05:54,480 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 [2019-10-15 03:05:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:55,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:05:55,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:05:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:05:55,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:05:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:05:56,189 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:05:56,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 03:05:56,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897489622] [2019-10-15 03:05:56,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:05:56,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:05:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:05:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:05:56,226 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2019-10-15 03:05:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:05:58,694 INFO L93 Difference]: Finished difference Result 1848 states and 2867 transitions. [2019-10-15 03:05:58,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:05:58,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-15 03:05:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:05:58,738 INFO L225 Difference]: With dead ends: 1848 [2019-10-15 03:05:58,738 INFO L226 Difference]: Without dead ends: 1363 [2019-10-15 03:05:58,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:05:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-15 03:05:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1275. [2019-10-15 03:05:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1275 states. [2019-10-15 03:05:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1957 transitions. [2019-10-15 03:05:58,974 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1957 transitions. Word has length 95 [2019-10-15 03:05:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:05:58,975 INFO L462 AbstractCegarLoop]: Abstraction has 1275 states and 1957 transitions. [2019-10-15 03:05:58,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:05:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1957 transitions. [2019-10-15 03:05:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 03:05:59,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:05:59,000 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:05:59,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:05:59,216 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:05:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:05:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1646565484, now seen corresponding path program 1 times [2019-10-15 03:05:59,217 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:05:59,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851690504] [2019-10-15 03:05:59,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:59,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:59,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:05:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:05:59,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851690504] [2019-10-15 03:05:59,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:05:59,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 03:05:59,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991349315] [2019-10-15 03:05:59,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:05:59,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:05:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:05:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:05:59,777 INFO L87 Difference]: Start difference. First operand 1275 states and 1957 transitions. Second operand 10 states. [2019-10-15 03:06:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:01,946 INFO L93 Difference]: Finished difference Result 2710 states and 4173 transitions. [2019-10-15 03:06:01,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:06:01,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-10-15 03:06:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:01,961 INFO L225 Difference]: With dead ends: 2710 [2019-10-15 03:06:01,961 INFO L226 Difference]: Without dead ends: 1472 [2019-10-15 03:06:01,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:06:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2019-10-15 03:06:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1464. [2019-10-15 03:06:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-10-15 03:06:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2227 transitions. [2019-10-15 03:06:02,092 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2227 transitions. Word has length 136 [2019-10-15 03:06:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:02,095 INFO L462 AbstractCegarLoop]: Abstraction has 1464 states and 2227 transitions. [2019-10-15 03:06:02,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:06:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2227 transitions. [2019-10-15 03:06:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 03:06:02,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:02,105 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:02,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash -602275500, now seen corresponding path program 1 times [2019-10-15 03:06:02,106 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:02,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456479410] [2019-10-15 03:06:02,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:02,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:02,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:02,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456479410] [2019-10-15 03:06:02,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:02,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:06:02,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658647687] [2019-10-15 03:06:02,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:06:02,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:06:02,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:02,608 INFO L87 Difference]: Start difference. First operand 1464 states and 2227 transitions. Second operand 9 states. [2019-10-15 03:06:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:10,108 INFO L93 Difference]: Finished difference Result 4348 states and 6705 transitions. [2019-10-15 03:06:10,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 03:06:10,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-10-15 03:06:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:10,137 INFO L225 Difference]: With dead ends: 4348 [2019-10-15 03:06:10,137 INFO L226 Difference]: Without dead ends: 2924 [2019-10-15 03:06:10,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:06:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2019-10-15 03:06:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2808. [2019-10-15 03:06:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2019-10-15 03:06:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 4330 transitions. [2019-10-15 03:06:10,308 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 4330 transitions. Word has length 137 [2019-10-15 03:06:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:10,310 INFO L462 AbstractCegarLoop]: Abstraction has 2808 states and 4330 transitions. [2019-10-15 03:06:10,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:06:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 4330 transitions. [2019-10-15 03:06:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 03:06:10,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:10,316 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:10,316 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash 631605660, now seen corresponding path program 1 times [2019-10-15 03:06:10,317 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:10,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373297054] [2019-10-15 03:06:10,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:10,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:10,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:10,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373297054] [2019-10-15 03:06:10,588 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:10,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:10,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118521183] [2019-10-15 03:06:10,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:10,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:10,591 INFO L87 Difference]: Start difference. First operand 2808 states and 4330 transitions. Second operand 7 states. [2019-10-15 03:06:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:10,798 INFO L93 Difference]: Finished difference Result 4576 states and 7127 transitions. [2019-10-15 03:06:10,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:10,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-15 03:06:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:10,827 INFO L225 Difference]: With dead ends: 4576 [2019-10-15 03:06:10,828 INFO L226 Difference]: Without dead ends: 2878 [2019-10-15 03:06:10,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2019-10-15 03:06:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2850. [2019-10-15 03:06:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2850 states. [2019-10-15 03:06:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4390 transitions. [2019-10-15 03:06:11,015 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4390 transitions. Word has length 142 [2019-10-15 03:06:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:11,016 INFO L462 AbstractCegarLoop]: Abstraction has 2850 states and 4390 transitions. [2019-10-15 03:06:11,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4390 transitions. [2019-10-15 03:06:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 03:06:11,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:11,022 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:11,022 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 641621857, now seen corresponding path program 1 times [2019-10-15 03:06:11,023 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:11,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066546777] [2019-10-15 03:06:11,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:11,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066546777] [2019-10-15 03:06:11,288 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:11,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:11,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019587825] [2019-10-15 03:06:11,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:11,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:11,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:11,290 INFO L87 Difference]: Start difference. First operand 2850 states and 4390 transitions. Second operand 7 states. [2019-10-15 03:06:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:11,572 INFO L93 Difference]: Finished difference Result 4634 states and 7203 transitions. [2019-10-15 03:06:11,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:11,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-15 03:06:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:11,597 INFO L225 Difference]: With dead ends: 4634 [2019-10-15 03:06:11,597 INFO L226 Difference]: Without dead ends: 2908 [2019-10-15 03:06:11,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2019-10-15 03:06:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2856. [2019-10-15 03:06:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2856 states. [2019-10-15 03:06:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4396 transitions. [2019-10-15 03:06:11,887 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4396 transitions. Word has length 141 [2019-10-15 03:06:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:11,889 INFO L462 AbstractCegarLoop]: Abstraction has 2856 states and 4396 transitions. [2019-10-15 03:06:11,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4396 transitions. [2019-10-15 03:06:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 03:06:11,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:11,896 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:11,896 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -353337476, now seen corresponding path program 1 times [2019-10-15 03:06:11,900 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:11,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128043585] [2019-10-15 03:06:11,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:12,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128043585] [2019-10-15 03:06:12,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:12,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:12,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73640071] [2019-10-15 03:06:12,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:12,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:12,172 INFO L87 Difference]: Start difference. First operand 2856 states and 4396 transitions. Second operand 7 states. [2019-10-15 03:06:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:12,348 INFO L93 Difference]: Finished difference Result 4644 states and 7213 transitions. [2019-10-15 03:06:12,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:12,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-15 03:06:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:12,381 INFO L225 Difference]: With dead ends: 4644 [2019-10-15 03:06:12,382 INFO L226 Difference]: Without dead ends: 2914 [2019-10-15 03:06:12,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2019-10-15 03:06:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2862. [2019-10-15 03:06:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2862 states. [2019-10-15 03:06:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 4402 transitions. [2019-10-15 03:06:12,589 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 4402 transitions. Word has length 142 [2019-10-15 03:06:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:12,592 INFO L462 AbstractCegarLoop]: Abstraction has 2862 states and 4402 transitions. [2019-10-15 03:06:12,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 4402 transitions. [2019-10-15 03:06:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 03:06:12,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:12,600 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:12,601 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -55837836, now seen corresponding path program 1 times [2019-10-15 03:06:12,602 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:12,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082485926] [2019-10-15 03:06:12,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:12,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:12,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:12,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082485926] [2019-10-15 03:06:12,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:12,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:12,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909618834] [2019-10-15 03:06:12,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:12,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:12,979 INFO L87 Difference]: Start difference. First operand 2862 states and 4402 transitions. Second operand 7 states. [2019-10-15 03:06:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:17,937 INFO L93 Difference]: Finished difference Result 6470 states and 10173 transitions. [2019-10-15 03:06:17,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:06:17,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2019-10-15 03:06:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:17,985 INFO L225 Difference]: With dead ends: 6470 [2019-10-15 03:06:17,986 INFO L226 Difference]: Without dead ends: 4486 [2019-10-15 03:06:18,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2019-10-15 03:06:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4286. [2019-10-15 03:06:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4286 states. [2019-10-15 03:06:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6496 transitions. [2019-10-15 03:06:18,247 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6496 transitions. Word has length 146 [2019-10-15 03:06:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:18,248 INFO L462 AbstractCegarLoop]: Abstraction has 4286 states and 6496 transitions. [2019-10-15 03:06:18,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6496 transitions. [2019-10-15 03:06:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 03:06:18,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:18,257 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:18,258 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 830452315, now seen corresponding path program 1 times [2019-10-15 03:06:18,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:18,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409391367] [2019-10-15 03:06:18,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:18,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:18,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:18,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409391367] [2019-10-15 03:06:18,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:18,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:06:18,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240334492] [2019-10-15 03:06:18,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:06:18,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:18,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:06:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:18,620 INFO L87 Difference]: Start difference. First operand 4286 states and 6496 transitions. Second operand 9 states. [2019-10-15 03:06:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:19,147 INFO L93 Difference]: Finished difference Result 8150 states and 12631 transitions. [2019-10-15 03:06:19,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 03:06:19,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2019-10-15 03:06:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:19,211 INFO L225 Difference]: With dead ends: 8150 [2019-10-15 03:06:19,211 INFO L226 Difference]: Without dead ends: 4694 [2019-10-15 03:06:19,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:06:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2019-10-15 03:06:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4694. [2019-10-15 03:06:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4694 states. [2019-10-15 03:06:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 7104 transitions. [2019-10-15 03:06:19,537 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 7104 transitions. Word has length 149 [2019-10-15 03:06:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:19,538 INFO L462 AbstractCegarLoop]: Abstraction has 4694 states and 7104 transitions. [2019-10-15 03:06:19,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:06:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 7104 transitions. [2019-10-15 03:06:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 03:06:19,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:19,548 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:19,548 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash -516814652, now seen corresponding path program 1 times [2019-10-15 03:06:19,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:19,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682662927] [2019-10-15 03:06:19,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:19,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:19,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:19,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682662927] [2019-10-15 03:06:19,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:19,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:19,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367258968] [2019-10-15 03:06:19,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:19,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:19,921 INFO L87 Difference]: Start difference. First operand 4694 states and 7104 transitions. Second operand 7 states.