java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:05:48,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:05:48,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:05:48,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:05:48,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:05:48,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:05:48,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:05:48,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:05:48,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:05:48,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:05:48,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:05:48,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:05:48,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:05:48,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:05:48,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:05:48,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:05:48,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:05:48,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:05:48,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:05:48,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:05:48,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:05:48,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:05:48,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:05:48,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:05:48,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:05:48,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:05:48,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:05:48,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:05:48,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:05:48,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:05:48,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:05:48,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:05:48,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:05:48,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:05:48,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:05:48,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:05:48,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:05:48,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:05:48,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:05:48,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:05:48,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:05:48,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:05:48,521 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:05:48,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:05:48,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:05:48,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:05:48,523 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:05:48,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:05:48,524 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:05:48,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:05:48,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:05:48,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:05:48,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:05:48,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:05:48,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:05:48,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:05:48,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:05:48,528 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:05:48,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:05:48,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:05:48,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:05:48,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:05:48,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:05:48,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:05:48,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:05:48,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:05:48,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:05:48,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:05:48,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:05:48,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:05:48,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:05:48,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:05:48,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:05:48,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:05:48,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:05:48,941 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:05:48,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-15 03:05:49,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d661edfd2/cb44d790290a4a22bf667ef1c811784d/FLAG374eeece6 [2019-10-15 03:05:49,971 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:05:49,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-15 03:05:50,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d661edfd2/cb44d790290a4a22bf667ef1c811784d/FLAG374eeece6 [2019-10-15 03:05:50,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d661edfd2/cb44d790290a4a22bf667ef1c811784d [2019-10-15 03:05:50,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:05:50,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:05:50,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:50,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:05:50,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:05:50,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:50" (1/1) ... [2019-10-15 03:05:50,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bda3564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:50, skipping insertion in model container [2019-10-15 03:05:50,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:50" (1/1) ... [2019-10-15 03:05:50,115 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:05:50,222 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:05:51,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:51,209 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:05:51,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:51,528 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:05:51,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51 WrapperNode [2019-10-15 03:05:51,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:51,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:05:51,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:05:51,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:05:51,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:05:51,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:05:51,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:05:51,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:05:51,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:05:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:05:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:05:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:51,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:05:51,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:05:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:05:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:05:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:05:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:05:51,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:05:51,914 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:05:51,914 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:05:51,914 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:05:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:05:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:05:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:05:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:05:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:05:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:05:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:05:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:05:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:05:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:05:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 03:05:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:05:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:51,919 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:05:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:05:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 03:05:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 03:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:05:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:05:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:05:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:05:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:05:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:05:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:05:51,924 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:05:51,924 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:05:51,924 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:05:51,924 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:05:51,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:05:51,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:05:51,926 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:05:51,926 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:05:51,926 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:05:51,926 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:05:51,926 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:05:51,927 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:05:51,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:05:51,927 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:05:51,927 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:05:51,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:05:51,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:51,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:51,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:05:51,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:05:51,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:05:51,930 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:05:51,930 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:05:51,930 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:05:51,931 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:05:51,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:05:51,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:05:51,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:05:51,933 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:05:51,933 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:05:51,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:05:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:05:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:05:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:05:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:05:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:05:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:05:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:05:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:05:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:05:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:05:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:05:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:05:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:05:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:05:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:05:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:05:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:05:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:05:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:05:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:05:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:05:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:05:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:05:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:05:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:05:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:05:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:05:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:05:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:05:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:05:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:05:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:05:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:05:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:05:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 03:05:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:05:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:05:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:05:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 03:05:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:05:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:05:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:05:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 03:05:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 03:05:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:05:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:05:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:05:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:05:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:05:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:05:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:05:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:05:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:05:58,047 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:05:58,047 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:05:58,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:58 BoogieIcfgContainer [2019-10-15 03:05:58,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:05:58,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:05:58,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:05:58,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:05:58,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:05:50" (1/3) ... [2019-10-15 03:05:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221b09a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:58, skipping insertion in model container [2019-10-15 03:05:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (2/3) ... [2019-10-15 03:05:58,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221b09a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:58, skipping insertion in model container [2019-10-15 03:05:58,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:58" (3/3) ... [2019-10-15 03:05:58,070 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2019-10-15 03:05:58,089 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:05:58,105 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:05:58,118 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:05:58,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:05:58,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:05:58,152 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:05:58,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:05:58,153 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:05:58,153 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:05:58,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:05:58,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:05:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states. [2019-10-15 03:05:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 03:05:58,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:05:58,207 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:05:58,209 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:05:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:05:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1771794574, now seen corresponding path program 1 times [2019-10-15 03:05:58,225 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:05:58,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222592490] [2019-10-15 03:05:58,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:58,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:58,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:05:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:05:58,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222592490] [2019-10-15 03:05:58,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439271297] [2019-10-15 03:05:58,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:05:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:59,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 03:05:59,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:05:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:05:59,739 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:05:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:05:59,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:05:59,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-15 03:05:59,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117270256] [2019-10-15 03:05:59,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:05:59,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:05:59,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:05:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:05:59,966 INFO L87 Difference]: Start difference. First operand 631 states. Second operand 2 states. [2019-10-15 03:06:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:00,064 INFO L93 Difference]: Finished difference Result 1000 states and 1512 transitions. [2019-10-15 03:06:00,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:06:00,065 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 95 [2019-10-15 03:06:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:00,090 INFO L225 Difference]: With dead ends: 1000 [2019-10-15 03:06:00,091 INFO L226 Difference]: Without dead ends: 508 [2019-10-15 03:06:00,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:06:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2019-10-15 03:06:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2019-10-15 03:06:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2019-10-15 03:06:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 752 transitions. [2019-10-15 03:06:00,219 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 752 transitions. Word has length 95 [2019-10-15 03:06:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:00,223 INFO L462 AbstractCegarLoop]: Abstraction has 508 states and 752 transitions. [2019-10-15 03:06:00,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:06:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 752 transitions. [2019-10-15 03:06:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 03:06:00,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:00,240 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:00,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:00,447 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1084400178, now seen corresponding path program 1 times [2019-10-15 03:06:00,448 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:00,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300863493] [2019-10-15 03:06:00,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:00,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:00,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:06:00,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300863493] [2019-10-15 03:06:00,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980531252] [2019-10-15 03:06:00,755 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 [2019-10-15 03:06:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:01,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:06:01,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:06:01,488 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:01,674 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:06:01,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 03:06:01,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174740421] [2019-10-15 03:06:01,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:01,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:01,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:06:01,681 INFO L87 Difference]: Start difference. First operand 508 states and 752 transitions. Second operand 4 states. [2019-10-15 03:06:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:02,885 INFO L93 Difference]: Finished difference Result 1915 states and 2904 transitions. [2019-10-15 03:06:02,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:06:02,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-15 03:06:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:02,903 INFO L225 Difference]: With dead ends: 1915 [2019-10-15 03:06:02,904 INFO L226 Difference]: Without dead ends: 1444 [2019-10-15 03:06:02,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:06:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2019-10-15 03:06:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1356. [2019-10-15 03:06:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1356 states. [2019-10-15 03:06:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2062 transitions. [2019-10-15 03:06:03,025 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2062 transitions. Word has length 95 [2019-10-15 03:06:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:03,026 INFO L462 AbstractCegarLoop]: Abstraction has 1356 states and 2062 transitions. [2019-10-15 03:06:03,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2062 transitions. [2019-10-15 03:06:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 03:06:03,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:03,036 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:03,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:03,243 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 440506225, now seen corresponding path program 1 times [2019-10-15 03:06:03,244 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:03,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713376949] [2019-10-15 03:06:03,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:03,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:03,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:06:03,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713376949] [2019-10-15 03:06:03,676 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:03,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:03,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602691765] [2019-10-15 03:06:03,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:03,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:03,679 INFO L87 Difference]: Start difference. First operand 1356 states and 2062 transitions. Second operand 7 states. [2019-10-15 03:06:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:09,600 INFO L93 Difference]: Finished difference Result 4103 states and 6335 transitions. [2019-10-15 03:06:09,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 03:06:09,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-15 03:06:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:09,641 INFO L225 Difference]: With dead ends: 4103 [2019-10-15 03:06:09,641 INFO L226 Difference]: Without dead ends: 2785 [2019-10-15 03:06:09,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:06:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2019-10-15 03:06:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2690. [2019-10-15 03:06:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-10-15 03:06:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 4134 transitions. [2019-10-15 03:06:09,900 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 4134 transitions. Word has length 143 [2019-10-15 03:06:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:09,901 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 4134 transitions. [2019-10-15 03:06:09,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 4134 transitions. [2019-10-15 03:06:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 03:06:09,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:09,909 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:09,909 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1565643477, now seen corresponding path program 1 times [2019-10-15 03:06:09,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:09,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957704682] [2019-10-15 03:06:09,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:09,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:09,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:06:10,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957704682] [2019-10-15 03:06:10,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:10,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 03:06:10,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200367378] [2019-10-15 03:06:10,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:06:10,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:10,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:06:10,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:06:10,231 INFO L87 Difference]: Start difference. First operand 2690 states and 4134 transitions. Second operand 10 states. [2019-10-15 03:06:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:11,807 INFO L93 Difference]: Finished difference Result 5375 states and 8288 transitions. [2019-10-15 03:06:11,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:06:11,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2019-10-15 03:06:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:11,834 INFO L225 Difference]: With dead ends: 5375 [2019-10-15 03:06:11,834 INFO L226 Difference]: Without dead ends: 2722 [2019-10-15 03:06:11,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:06:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2019-10-15 03:06:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2708. [2019-10-15 03:06:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2708 states. [2019-10-15 03:06:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 4114 transitions. [2019-10-15 03:06:12,075 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 4114 transitions. Word has length 146 [2019-10-15 03:06:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:12,075 INFO L462 AbstractCegarLoop]: Abstraction has 2708 states and 4114 transitions. [2019-10-15 03:06:12,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:06:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 4114 transitions. [2019-10-15 03:06:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 03:06:12,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:12,081 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:12,081 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:12,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1838617235, now seen corresponding path program 1 times [2019-10-15 03:06:12,082 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:12,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808106573] [2019-10-15 03:06:12,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:12,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:12,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:06:12,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808106573] [2019-10-15 03:06:12,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782893662] [2019-10-15 03:06:12,265 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 [2019-10-15 03:06:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:12,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:13,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:13,025 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:06:13,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:13,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 03:06:13,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051191251] [2019-10-15 03:06:13,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:13,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:06:13,311 INFO L87 Difference]: Start difference. First operand 2708 states and 4114 transitions. Second operand 4 states. [2019-10-15 03:06:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:13,445 INFO L93 Difference]: Finished difference Result 5427 states and 8404 transitions. [2019-10-15 03:06:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:13,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 03:06:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:13,469 INFO L225 Difference]: With dead ends: 5427 [2019-10-15 03:06:13,469 INFO L226 Difference]: Without dead ends: 2756 [2019-10-15 03:06:13,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:06:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2019-10-15 03:06:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2756. [2019-10-15 03:06:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2756 states. [2019-10-15 03:06:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4162 transitions. [2019-10-15 03:06:13,679 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4162 transitions. Word has length 147 [2019-10-15 03:06:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:13,680 INFO L462 AbstractCegarLoop]: Abstraction has 2756 states and 4162 transitions. [2019-10-15 03:06:13,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4162 transitions. [2019-10-15 03:06:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 03:06:13,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:13,686 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:13,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:13,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:13,895 INFO L82 PathProgramCache]: Analyzing trace with hash 159192644, now seen corresponding path program 1 times [2019-10-15 03:06:13,896 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:13,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024792120] [2019-10-15 03:06:13,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:13,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:13,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:06:14,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024792120] [2019-10-15 03:06:14,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419495349] [2019-10-15 03:06:14,195 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 [2019-10-15 03:06:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:14,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 3219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:14,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 03:06:14,899 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 03:06:15,099 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:06:15,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-15 03:06:15,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470558014] [2019-10-15 03:06:15,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:15,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:15,103 INFO L87 Difference]: Start difference. First operand 2756 states and 4162 transitions. Second operand 5 states. [2019-10-15 03:06:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:15,251 INFO L93 Difference]: Finished difference Result 5499 states and 8444 transitions. [2019-10-15 03:06:15,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:15,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-10-15 03:06:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:15,272 INFO L225 Difference]: With dead ends: 5499 [2019-10-15 03:06:15,272 INFO L226 Difference]: Without dead ends: 2748 [2019-10-15 03:06:15,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2019-10-15 03:06:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2748. [2019-10-15 03:06:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2748 states. [2019-10-15 03:06:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4130 transitions. [2019-10-15 03:06:15,416 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4130 transitions. Word has length 149 [2019-10-15 03:06:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:15,417 INFO L462 AbstractCegarLoop]: Abstraction has 2748 states and 4130 transitions. [2019-10-15 03:06:15,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4130 transitions. [2019-10-15 03:06:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 03:06:15,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:15,426 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:15,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:15,638 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 546800277, now seen corresponding path program 1 times [2019-10-15 03:06:15,640 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:15,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883886055] [2019-10-15 03:06:15,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:15,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:15,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:06:15,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883886055] [2019-10-15 03:06:15,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200254747] [2019-10-15 03:06:15,963 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 [2019-10-15 03:06:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:16,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 3223 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:06:16,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:16,760 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:06:17,054 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:17,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-15 03:06:17,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713291691] [2019-10-15 03:06:17,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:17,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:17,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:06:17,056 INFO L87 Difference]: Start difference. First operand 2748 states and 4130 transitions. Second operand 5 states. [2019-10-15 03:06:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:18,609 INFO L93 Difference]: Finished difference Result 6956 states and 10897 transitions. [2019-10-15 03:06:18,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:06:18,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-15 03:06:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:18,640 INFO L225 Difference]: With dead ends: 6956 [2019-10-15 03:06:18,640 INFO L226 Difference]: Without dead ends: 4245 [2019-10-15 03:06:18,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:06:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2019-10-15 03:06:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4184. [2019-10-15 03:06:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4184 states. [2019-10-15 03:06:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 6343 transitions. [2019-10-15 03:06:18,937 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 6343 transitions. Word has length 150 [2019-10-15 03:06:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:18,938 INFO L462 AbstractCegarLoop]: Abstraction has 4184 states and 6343 transitions. [2019-10-15 03:06:18,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 6343 transitions. [2019-10-15 03:06:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 03:06:18,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:18,944 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:19,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:19,155 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1184688602, now seen corresponding path program 1 times [2019-10-15 03:06:19,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:19,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929085380] [2019-10-15 03:06:19,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:19,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:19,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:06:19,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929085380] [2019-10-15 03:06:19,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386232206] [2019-10-15 03:06:19,401 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 [2019-10-15 03:06:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:20,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 03:06:20,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:06:20,291 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:06:20,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:20,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-10-15 03:06:20,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139714109] [2019-10-15 03:06:20,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:20,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:20,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:06:20,653 INFO L87 Difference]: Start difference. First operand 4184 states and 6343 transitions. Second operand 7 states. [2019-10-15 03:06:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:22,772 INFO L93 Difference]: Finished difference Result 9473 states and 14880 transitions. [2019-10-15 03:06:22,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:06:22,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2019-10-15 03:06:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:22,816 INFO L225 Difference]: With dead ends: 9473 [2019-10-15 03:06:22,816 INFO L226 Difference]: Without dead ends: 5326 [2019-10-15 03:06:22,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-15 03:06:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2019-10-15 03:06:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5280. [2019-10-15 03:06:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5280 states. [2019-10-15 03:06:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 8354 transitions. [2019-10-15 03:06:23,125 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 8354 transitions. Word has length 151 [2019-10-15 03:06:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:23,126 INFO L462 AbstractCegarLoop]: Abstraction has 5280 states and 8354 transitions. [2019-10-15 03:06:23,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 8354 transitions. [2019-10-15 03:06:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 03:06:23,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:23,131 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:23,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:23,349 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash -19027897, now seen corresponding path program 1 times [2019-10-15 03:06:23,350 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:23,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364886779] [2019-10-15 03:06:23,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:23,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:23,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:06:23,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364886779] [2019-10-15 03:06:23,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598878530] [2019-10-15 03:06:23,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:24,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 3226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:24,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 03:06:24,319 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:06:24,689 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:06:24,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-10-15 03:06:24,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055813452] [2019-10-15 03:06:24,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:24,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:24,691 INFO L87 Difference]: Start difference. First operand 5280 states and 8354 transitions. Second operand 5 states. [2019-10-15 03:06:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:25,131 INFO L93 Difference]: Finished difference Result 10642 states and 17417 transitions. [2019-10-15 03:06:25,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:25,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2019-10-15 03:06:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:25,172 INFO L225 Difference]: With dead ends: 10642 [2019-10-15 03:06:25,172 INFO L226 Difference]: Without dead ends: 5412 [2019-10-15 03:06:25,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 297 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states.