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_spec14_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:02:27,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:02:27,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:02:27,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:02:27,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:02:27,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:02:27,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:02:27,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:02:27,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:02:27,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:02:27,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:02:27,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:02:27,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:02:27,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:02:27,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:02:27,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:02:27,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:02:27,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:02:27,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:02:27,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:02:27,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:02:27,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:02:27,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:02:27,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:02:27,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:02:27,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:02:27,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:02:27,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:02:27,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:02:27,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:02:27,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:02:27,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:02:27,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:02:27,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:02:27,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:02:27,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:02:27,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:02:27,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:02:27,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:02:27,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:02:27,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:02:27,495 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 23:02:27,516 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:02:27,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:02:27,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:02:27,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:02:27,519 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:02:27,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:02:27,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:02:27,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:02:27,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:02:27,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:02:27,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:02:27,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:02:27,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:02:27,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:02:27,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:02:27,522 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:02:27,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:02:27,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:02:27,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:02:27,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:02:27,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:02:27,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:02:27,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:02:27,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:02:27,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:02:27,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:02:27,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:02:27,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:02:27,525 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 23:02:27,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:02:27,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:02:27,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:02:27,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:02:27,875 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:02:27,876 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-10-13 23:02:27,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99b2d8d/0c36b413759847e8851e0cf06421efe7/FLAG3c58066b2 [2019-10-13 23:02:28,536 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:02:28,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-10-13 23:02:28,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99b2d8d/0c36b413759847e8851e0cf06421efe7/FLAG3c58066b2 [2019-10-13 23:02:28,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed99b2d8d/0c36b413759847e8851e0cf06421efe7 [2019-10-13 23:02:28,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:02:28,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:02:28,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:28,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:02:28,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:02:28,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:28" (1/1) ... [2019-10-13 23:02:28,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc1a0c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:28, skipping insertion in model container [2019-10-13 23:02:28,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:28" (1/1) ... [2019-10-13 23:02:28,817 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:02:28,899 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:02:29,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:29,572 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:02:29,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:29,819 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:02:29,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29 WrapperNode [2019-10-13 23:02:29,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:29,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:02:29,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:02:29,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:02:29,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:29,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:29,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:29,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:30,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:30,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:30,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (1/1) ... [2019-10-13 23:02:30,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:02:30,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:02:30,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:02:30,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:02:30,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (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 23:02:30,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:02:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:02:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:02:30,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:02:30,197 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:02:30,197 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:02:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:02:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:02:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:02:30,198 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:02:30,199 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:02:30,199 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:02:30,199 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:02:30,200 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:02:30,200 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:02:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:02:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:02:30,202 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:02:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:02:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:02:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:02:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:02:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:02:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:02:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:02:30,206 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:02:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:02:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:02:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:02:30,207 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:02:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:02:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:02:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:02:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:02:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:02:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:02:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:02:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:02:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:02:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:02:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:02:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:02:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:02:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:02:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:02:30,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:02:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:02:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:02:30,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:02:30,216 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 23:02:30,216 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:02:30,217 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 23:02:30,217 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:02:30,217 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:02:30,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:02:30,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:02:30,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:02:30,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:02:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:02:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:02:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:02:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:02:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:02:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:02:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:02:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:02:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:02:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:02:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:02:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:02:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:02:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:02:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:02:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:02:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:02:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:02:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:02:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:02:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:02:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:02:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:02:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:02:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:02:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:02:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:02:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:02:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:02:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:02:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:02:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:02:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:02:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:02:30,242 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:02:30,242 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:02:30,242 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:02:30,242 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:02:30,243 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:02:30,243 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:02:30,243 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:02:30,244 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:02:30,244 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:02:30,245 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:02:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:02:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:02:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:02:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:02:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:02:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:02:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:02:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:02:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:02:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:02:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:02:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:02:35,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:02:35,197 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:02:35,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:35 BoogieIcfgContainer [2019-10-13 23:02:35,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:02:35,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:02:35,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:02:35,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:02:35,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:02:28" (1/3) ... [2019-10-13 23:02:35,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599676ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:35, skipping insertion in model container [2019-10-13 23:02:35,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:29" (2/3) ... [2019-10-13 23:02:35,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599676ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:35, skipping insertion in model container [2019-10-13 23:02:35,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:35" (3/3) ... [2019-10-13 23:02:35,209 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2019-10-13 23:02:35,216 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:02:35,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:02:35,235 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:02:35,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:02:35,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:02:35,266 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:02:35,266 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:02:35,266 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:02:35,266 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:02:35,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:02:35,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:02:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states. [2019-10-13 23:02:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:02:35,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:35,314 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] [2019-10-13 23:02:35,316 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -252975014, now seen corresponding path program 1 times [2019-10-13 23:02:35,333 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:35,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25809664] [2019-10-13 23:02:35,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:35,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:35,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:36,036 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 23:02:36,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25809664] [2019-10-13 23:02:36,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:36,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:02:36,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403160446] [2019-10-13 23:02:36,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:02:36,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:02:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:02:36,061 INFO L87 Difference]: Start difference. First operand 587 states. Second operand 3 states. [2019-10-13 23:02:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:36,409 INFO L93 Difference]: Finished difference Result 1338 states and 1999 transitions. [2019-10-13 23:02:36,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:02:36,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-13 23:02:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:36,443 INFO L225 Difference]: With dead ends: 1338 [2019-10-13 23:02:36,444 INFO L226 Difference]: Without dead ends: 879 [2019-10-13 23:02:36,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 23:02:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2019-10-13 23:02:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 834. [2019-10-13 23:02:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2019-10-13 23:02:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1241 transitions. [2019-10-13 23:02:36,631 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1241 transitions. Word has length 72 [2019-10-13 23:02:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:36,631 INFO L462 AbstractCegarLoop]: Abstraction has 834 states and 1241 transitions. [2019-10-13 23:02:36,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:02:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1241 transitions. [2019-10-13 23:02:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:02:36,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:36,653 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-13 23:02:36,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1851066837, now seen corresponding path program 1 times [2019-10-13 23:02:36,654 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:36,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021251204] [2019-10-13 23:02:36,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:36,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:36,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:37,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021251204] [2019-10-13 23:02:37,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357082711] [2019-10-13 23:02:37,124 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 23:02:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:37,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:37,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:37,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:38,204 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:38,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-10-13 23:02:38,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136689011] [2019-10-13 23:02:38,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:02:38,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:38,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:02:38,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:38,207 INFO L87 Difference]: Start difference. First operand 834 states and 1241 transitions. Second operand 6 states. [2019-10-13 23:02:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:38,941 INFO L93 Difference]: Finished difference Result 1920 states and 2834 transitions. [2019-10-13 23:02:38,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:38,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-13 23:02:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:38,956 INFO L225 Difference]: With dead ends: 1920 [2019-10-13 23:02:38,956 INFO L226 Difference]: Without dead ends: 1116 [2019-10-13 23:02:38,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-13 23:02:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1109. [2019-10-13 23:02:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-13 23:02:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1603 transitions. [2019-10-13 23:02:39,044 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1603 transitions. Word has length 119 [2019-10-13 23:02:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:39,046 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1603 transitions. [2019-10-13 23:02:39,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:02:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1603 transitions. [2019-10-13 23:02:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:02:39,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:39,058 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:39,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:39,267 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -28644872, now seen corresponding path program 1 times [2019-10-13 23:02:39,268 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:39,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18754571] [2019-10-13 23:02:39,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:39,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:39,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 23:02:39,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18754571] [2019-10-13 23:02:39,543 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:39,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:39,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264998528] [2019-10-13 23:02:39,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:39,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:39,545 INFO L87 Difference]: Start difference. First operand 1109 states and 1603 transitions. Second operand 7 states. [2019-10-13 23:02:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:43,672 INFO L93 Difference]: Finished difference Result 3104 states and 4564 transitions. [2019-10-13 23:02:43,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:02:43,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-13 23:02:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:43,696 INFO L225 Difference]: With dead ends: 3104 [2019-10-13 23:02:43,696 INFO L226 Difference]: Without dead ends: 2027 [2019-10-13 23:02:43,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2019-10-13 23:02:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1932. [2019-10-13 23:02:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2019-10-13 23:02:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2836 transitions. [2019-10-13 23:02:43,862 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2836 transitions. Word has length 120 [2019-10-13 23:02:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:43,865 INFO L462 AbstractCegarLoop]: Abstraction has 1932 states and 2836 transitions. [2019-10-13 23:02:43,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2836 transitions. [2019-10-13 23:02:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 23:02:43,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:43,874 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:43,875 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1126530492, now seen corresponding path program 1 times [2019-10-13 23:02:43,875 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:43,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699002113] [2019-10-13 23:02:43,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:43,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:43,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:44,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699002113] [2019-10-13 23:02:44,192 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:44,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:44,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912427857] [2019-10-13 23:02:44,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:44,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:44,195 INFO L87 Difference]: Start difference. First operand 1932 states and 2836 transitions. Second operand 9 states. [2019-10-13 23:02:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:48,310 INFO L93 Difference]: Finished difference Result 2111 states and 3118 transitions. [2019-10-13 23:02:48,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:02:48,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-10-13 23:02:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:48,329 INFO L225 Difference]: With dead ends: 2111 [2019-10-13 23:02:48,330 INFO L226 Difference]: Without dead ends: 2108 [2019-10-13 23:02:48,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-13 23:02:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2028. [2019-10-13 23:02:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2019-10-13 23:02:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2995 transitions. [2019-10-13 23:02:48,494 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2995 transitions. Word has length 124 [2019-10-13 23:02:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:48,495 INFO L462 AbstractCegarLoop]: Abstraction has 2028 states and 2995 transitions. [2019-10-13 23:02:48,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2995 transitions. [2019-10-13 23:02:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 23:02:48,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:48,502 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2019-10-13 23:02:48,502 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash 913097270, now seen corresponding path program 1 times [2019-10-13 23:02:48,503 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:48,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768565175] [2019-10-13 23:02:48,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-13 23:02:48,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768565175] [2019-10-13 23:02:48,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:48,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:02:48,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085823662] [2019-10-13 23:02:48,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:48,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:48,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:48,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:48,686 INFO L87 Difference]: Start difference. First operand 2028 states and 2995 transitions. Second operand 5 states. [2019-10-13 23:02:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:48,776 INFO L93 Difference]: Finished difference Result 4049 states and 6027 transitions. [2019-10-13 23:02:48,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:48,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-13 23:02:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:48,791 INFO L225 Difference]: With dead ends: 4049 [2019-10-13 23:02:48,791 INFO L226 Difference]: Without dead ends: 2052 [2019-10-13 23:02:48,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-10-13 23:02:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2052. [2019-10-13 23:02:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2052 states. [2019-10-13 23:02:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3019 transitions. [2019-10-13 23:02:48,891 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3019 transitions. Word has length 160 [2019-10-13 23:02:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:48,895 INFO L462 AbstractCegarLoop]: Abstraction has 2052 states and 3019 transitions. [2019-10-13 23:02:48,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3019 transitions. [2019-10-13 23:02:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 23:02:48,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:48,901 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1] [2019-10-13 23:02:48,901 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:48,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1862977440, now seen corresponding path program 1 times [2019-10-13 23:02:48,902 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:48,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132932567] [2019-10-13 23:02:48,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:49,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132932567] [2019-10-13 23:02:49,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859454147] [2019-10-13 23:02:49,084 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 23:02:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:49,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:49,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:02:49,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:50,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:50,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 23:02:50,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172267885] [2019-10-13 23:02:50,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:50,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:50,149 INFO L87 Difference]: Start difference. First operand 2052 states and 3019 transitions. Second operand 4 states. [2019-10-13 23:02:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:50,372 INFO L93 Difference]: Finished difference Result 4229 states and 6366 transitions. [2019-10-13 23:02:50,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:50,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 23:02:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:50,388 INFO L225 Difference]: With dead ends: 4229 [2019-10-13 23:02:50,388 INFO L226 Difference]: Without dead ends: 2208 [2019-10-13 23:02:50,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2019-10-13 23:02:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2019-10-13 23:02:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2208 states. [2019-10-13 23:02:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3311 transitions. [2019-10-13 23:02:50,501 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3311 transitions. Word has length 169 [2019-10-13 23:02:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:50,502 INFO L462 AbstractCegarLoop]: Abstraction has 2208 states and 3311 transitions. [2019-10-13 23:02:50,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3311 transitions. [2019-10-13 23:02:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 23:02:50,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:50,509 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2019-10-13 23:02:50,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:50,726 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1563345573, now seen corresponding path program 1 times [2019-10-13 23:02:50,727 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:50,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043405705] [2019-10-13 23:02:50,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:50,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:50,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:50,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043405705] [2019-10-13 23:02:50,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40881568] [2019-10-13 23:02:50,959 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 23:02:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:51,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:51,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:51,653 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:51,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:51,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:51,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918866344] [2019-10-13 23:02:51,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:51,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:51,876 INFO L87 Difference]: Start difference. First operand 2208 states and 3311 transitions. Second operand 4 states. [2019-10-13 23:02:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:52,132 INFO L93 Difference]: Finished difference Result 4541 states and 6946 transitions. [2019-10-13 23:02:52,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:52,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 23:02:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:52,150 INFO L225 Difference]: With dead ends: 4541 [2019-10-13 23:02:52,151 INFO L226 Difference]: Without dead ends: 2364 [2019-10-13 23:02:52,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2019-10-13 23:02:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2019-10-13 23:02:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2019-10-13 23:02:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3603 transitions. [2019-10-13 23:02:52,260 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3603 transitions. Word has length 174 [2019-10-13 23:02:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:52,263 INFO L462 AbstractCegarLoop]: Abstraction has 2364 states and 3603 transitions. [2019-10-13 23:02:52,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3603 transitions. [2019-10-13 23:02:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 23:02:52,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:52,274 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:52,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:52,482 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:52,483 INFO L82 PathProgramCache]: Analyzing trace with hash 456525333, now seen corresponding path program 1 times [2019-10-13 23:02:52,483 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:52,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588966924] [2019-10-13 23:02:52,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:02:52,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588966924] [2019-10-13 23:02:52,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131967211] [2019-10-13 23:02:52,649 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 23:02:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:53,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:53,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 23:02:53,576 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:02:53,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:53,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:53,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78515222] [2019-10-13 23:02:53,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:53,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:53,827 INFO L87 Difference]: Start difference. First operand 2364 states and 3603 transitions. Second operand 4 states. [2019-10-13 23:02:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:54,095 INFO L93 Difference]: Finished difference Result 4853 states and 7526 transitions. [2019-10-13 23:02:54,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:54,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 23:02:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:54,111 INFO L225 Difference]: With dead ends: 4853 [2019-10-13 23:02:54,111 INFO L226 Difference]: Without dead ends: 2520 [2019-10-13 23:02:54,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2019-10-13 23:02:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2520. [2019-10-13 23:02:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-10-13 23:02:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3895 transitions. [2019-10-13 23:02:54,217 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3895 transitions. Word has length 178 [2019-10-13 23:02:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:54,217 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3895 transitions. [2019-10-13 23:02:54,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3895 transitions. [2019-10-13 23:02:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 23:02:54,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:54,234 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:54,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:54,443 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:54,444 INFO L82 PathProgramCache]: Analyzing trace with hash 726319424, now seen corresponding path program 1 times [2019-10-13 23:02:54,445 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:54,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237212135] [2019-10-13 23:02:54,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:54,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:54,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:54,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237212135] [2019-10-13 23:02:54,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869085158] [2019-10-13 23:02:54,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:55,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:55,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 23:02:55,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:55,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:55,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:55,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435901346] [2019-10-13 23:02:55,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:55,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:55,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:55,624 INFO L87 Difference]: Start difference. First operand 2520 states and 3895 transitions. Second operand 4 states. [2019-10-13 23:02:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:55,899 INFO L93 Difference]: Finished difference Result 5165 states and 8106 transitions. [2019-10-13 23:02:55,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:55,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-10-13 23:02:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:55,917 INFO L225 Difference]: With dead ends: 5165 [2019-10-13 23:02:55,918 INFO L226 Difference]: Without dead ends: 2676 [2019-10-13 23:02:55,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2019-10-13 23:02:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2019-10-13 23:02:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2676 states. [2019-10-13 23:02:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4187 transitions. [2019-10-13 23:02:56,043 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4187 transitions. Word has length 181 [2019-10-13 23:02:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:56,044 INFO L462 AbstractCegarLoop]: Abstraction has 2676 states and 4187 transitions. [2019-10-13 23:02:56,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4187 transitions. [2019-10-13 23:02:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 23:02:56,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:56,052 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:56,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:56,260 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash 563451854, now seen corresponding path program 1 times [2019-10-13 23:02:56,261 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:56,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756713222] [2019-10-13 23:02:56,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:56,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:56,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:56,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756713222] [2019-10-13 23:02:56,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748796926] [2019-10-13 23:02:56,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:57,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 3198 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 23:02:57,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 23:02:57,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:57,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:02:57,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:02:57,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:02:57,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:02:57,762 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-13 23:02:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:57,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934857811] [2019-10-13 23:02:57,874 INFO L162 IcfgInterpreter]: Started Sifa with 143 locations of interest [2019-10-13 23:02:57,874 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:02:57,881 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:02:57,889 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:02:57,889 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs