/usr/bin/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:38:43,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:38:43,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:38:43,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:38:43,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:38:43,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:38:43,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:38:43,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:38:43,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:38:43,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:38:43,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:38:43,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:38:43,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:38:43,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:38:43,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:38:43,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:38:43,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:38:43,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:38:43,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:38:43,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:38:43,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:38:43,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:38:43,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:38:43,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:38:43,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:38:43,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:38:43,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:38:43,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:38:43,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:38:43,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:38:43,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:38:43,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:38:43,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:38:43,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:38:43,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:38:43,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:38:43,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:38:43,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:38:43,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:38:43,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:38:43,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:38:43,925 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 [2019-11-07 00:38:43,958 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:38:43,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:38:43,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:38:43,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:38:43,962 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:38:43,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:38:43,962 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:38:43,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:38:43,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:38:43,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:38:43,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:38:43,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:38:43,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:38:43,965 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:38:43,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:38:43,966 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:38:43,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:38:43,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:38:43,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:38:43,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:38:43,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:38:43,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:43,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:38:43,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:38:43,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:38:43,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:38:43,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:38:43,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:38:43,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:38:44,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:38:44,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:38:44,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:38:44,280 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:38:44,280 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:38:44,281 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-11-07 00:38:44,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fef9e820/264f645d70694fa4af294e71bf274ecf/FLAGd2fad323c [2019-11-07 00:38:45,022 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:38:45,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-11-07 00:38:45,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fef9e820/264f645d70694fa4af294e71bf274ecf/FLAGd2fad323c [2019-11-07 00:38:45,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fef9e820/264f645d70694fa4af294e71bf274ecf [2019-11-07 00:38:45,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:38:45,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:38:45,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:45,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:38:45,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:38:45,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:45" (1/1) ... [2019-11-07 00:38:45,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab010d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:45, skipping insertion in model container [2019-11-07 00:38:45,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:45" (1/1) ... [2019-11-07 00:38:45,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:38:45,331 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:38:46,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:46,078 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:38:46,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:46,274 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:38:46,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46 WrapperNode [2019-11-07 00:38:46,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:46,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:38:46,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:38:46,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:38:46,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... [2019-11-07 00:38:46,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:38:46,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:38:46,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:38:46,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:38:46,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:46,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:38:46,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:38:46,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:38:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:46,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:46,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:38:46,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:38:46,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:38:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:38:46,552 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:38:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:38:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:38:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:38:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:38:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:38:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:38:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:38:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:38:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:38:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:38:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:38:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:38:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:38:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:38:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:38:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:38:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:38:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:38:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:38:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:38:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:38:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:38:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:38:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:38:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:38:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:38:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:38:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:38:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:38:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:38:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:38:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:38:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:38:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:38:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:38:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:38:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:38:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:38:46,561 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:38:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:38:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:38:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:38:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:38:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:38:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:38:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:38:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:38:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:38:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:38:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:38:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:38:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:38:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:38:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:38:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:38:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:38:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:38:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:38:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:38:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:38:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:38:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:38:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:38:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:38:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:38:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:38:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:38:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:38:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:38:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:38:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:38:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:38:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:38:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:38:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:38:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:38:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:38:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:38:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:38:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:38:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:38:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:38:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:38:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:38:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:38:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:38:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:38:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:38:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:38:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:38:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:38:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:38:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:38:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:38:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:38:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:38:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:38:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:38:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:38:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:38:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:38:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:38:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:38:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:38:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:38:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:38:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:38:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:38:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:38:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:38:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:38:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:38:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:38:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:38:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:38:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:38:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:38:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:38:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:38:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:38:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:38:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:38:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:38:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:38:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:38:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:38:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:38:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:38:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:38:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:38:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:38:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:38:48,988 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:38:48,988 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:38:48,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:48 BoogieIcfgContainer [2019-11-07 00:38:48,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:38:48,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:38:48,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:38:48,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:38:48,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:38:45" (1/3) ... [2019-11-07 00:38:48,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370d0adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:48, skipping insertion in model container [2019-11-07 00:38:48,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:46" (2/3) ... [2019-11-07 00:38:48,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370d0adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:48, skipping insertion in model container [2019-11-07 00:38:48,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:48" (3/3) ... [2019-11-07 00:38:48,999 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2019-11-07 00:38:49,011 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:38:49,023 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:38:49,036 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:38:49,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:38:49,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:38:49,088 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:38:49,088 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:38:49,088 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:38:49,088 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:38:49,088 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:38:49,088 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:38:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states. [2019-11-07 00:38:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:38:49,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:49,174 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:49,176 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2055588152, now seen corresponding path program 1 times [2019-11-07 00:38:49,190 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:49,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728950964] [2019-11-07 00:38:49,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:49,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728950964] [2019-11-07 00:38:49,899 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226872582] [2019-11-07 00:38:49,899 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 [2019-11-07 00:38:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:50,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:38:50,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:50,679 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:50,879 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:50,879 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-11-07 00:38:50,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161964316] [2019-11-07 00:38:50,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:38:50,891 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:38:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:50,910 INFO L87 Difference]: Start difference. First operand 832 states. Second operand 2 states. [2019-11-07 00:38:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:51,047 INFO L93 Difference]: Finished difference Result 1357 states and 2183 transitions. [2019-11-07 00:38:51,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:38:51,052 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 161 [2019-11-07 00:38:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:51,098 INFO L225 Difference]: With dead ends: 1357 [2019-11-07 00:38:51,098 INFO L226 Difference]: Without dead ends: 686 [2019-11-07 00:38:51,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-11-07 00:38:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2019-11-07 00:38:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-11-07 00:38:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1083 transitions. [2019-11-07 00:38:51,221 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1083 transitions. Word has length 161 [2019-11-07 00:38:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:51,224 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1083 transitions. [2019-11-07 00:38:51,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:38:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1083 transitions. [2019-11-07 00:38:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:38:51,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:51,233 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:51,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:51,440 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1248623512, now seen corresponding path program 1 times [2019-11-07 00:38:51,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:51,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905679510] [2019-11-07 00:38:51,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:51,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905679510] [2019-11-07 00:38:51,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685003215] [2019-11-07 00:38:51,673 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 [2019-11-07 00:38:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:52,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:52,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:52,511 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:52,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:52,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:52,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920350539] [2019-11-07 00:38:52,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:52,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:52,719 INFO L87 Difference]: Start difference. First operand 686 states and 1083 transitions. Second operand 4 states. [2019-11-07 00:38:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:52,853 INFO L93 Difference]: Finished difference Result 1355 states and 2156 transitions. [2019-11-07 00:38:52,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:52,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-11-07 00:38:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:52,860 INFO L225 Difference]: With dead ends: 1355 [2019-11-07 00:38:52,861 INFO L226 Difference]: Without dead ends: 695 [2019-11-07 00:38:52,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-11-07 00:38:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2019-11-07 00:38:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-11-07 00:38:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1097 transitions. [2019-11-07 00:38:52,930 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1097 transitions. Word has length 161 [2019-11-07 00:38:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:52,932 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1097 transitions. [2019-11-07 00:38:52,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1097 transitions. [2019-11-07 00:38:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:38:52,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:52,942 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:53,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:53,150 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -916200834, now seen corresponding path program 1 times [2019-11-07 00:38:53,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:53,151 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674953849] [2019-11-07 00:38:53,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:53,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674953849] [2019-11-07 00:38:53,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737349402] [2019-11-07 00:38:53,405 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 [2019-11-07 00:38:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:54,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:54,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:54,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:54,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:54,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:54,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098115932] [2019-11-07 00:38:54,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:54,256 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:54,256 INFO L87 Difference]: Start difference. First operand 695 states and 1097 transitions. Second operand 4 states. [2019-11-07 00:38:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:54,506 INFO L93 Difference]: Finished difference Result 1401 states and 2241 transitions. [2019-11-07 00:38:54,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:54,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-11-07 00:38:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:54,514 INFO L225 Difference]: With dead ends: 1401 [2019-11-07 00:38:54,514 INFO L226 Difference]: Without dead ends: 734 [2019-11-07 00:38:54,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-11-07 00:38:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-11-07 00:38:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-11-07 00:38:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1171 transitions. [2019-11-07 00:38:54,553 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1171 transitions. Word has length 163 [2019-11-07 00:38:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:54,554 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1171 transitions. [2019-11-07 00:38:54,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1171 transitions. [2019-11-07 00:38:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 00:38:54,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:54,560 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:54,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:54,769 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash -444482810, now seen corresponding path program 1 times [2019-11-07 00:38:54,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:54,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319214401] [2019-11-07 00:38:54,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:54,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319214401] [2019-11-07 00:38:54,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108898027] [2019-11-07 00:38:54,928 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 [2019-11-07 00:38:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:55,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:55,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:55,627 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:55,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:55,888 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:55,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954436367] [2019-11-07 00:38:55,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:55,890 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:55,892 INFO L87 Difference]: Start difference. First operand 734 states and 1171 transitions. Second operand 7 states. [2019-11-07 00:38:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:56,074 INFO L93 Difference]: Finished difference Result 1454 states and 2332 transitions. [2019-11-07 00:38:56,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:56,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-11-07 00:38:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:56,088 INFO L225 Difference]: With dead ends: 1454 [2019-11-07 00:38:56,088 INFO L226 Difference]: Without dead ends: 748 [2019-11-07 00:38:56,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-11-07 00:38:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 741. [2019-11-07 00:38:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-11-07 00:38:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1182 transitions. [2019-11-07 00:38:56,143 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1182 transitions. Word has length 165 [2019-11-07 00:38:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:56,144 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1182 transitions. [2019-11-07 00:38:56,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1182 transitions. [2019-11-07 00:38:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:38:56,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:56,160 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:56,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:56,370 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 762157303, now seen corresponding path program 1 times [2019-11-07 00:38:56,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:56,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889194873] [2019-11-07 00:38:56,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:56,547 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889194873] [2019-11-07 00:38:56,547 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616408744] [2019-11-07 00:38:56,547 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 [2019-11-07 00:38:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:57,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:57,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:57,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:57,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:57,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:57,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801870163] [2019-11-07 00:38:57,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:57,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:57,438 INFO L87 Difference]: Start difference. First operand 741 states and 1182 transitions. Second operand 4 states. [2019-11-07 00:38:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:57,575 INFO L93 Difference]: Finished difference Result 1467 states and 2352 transitions. [2019-11-07 00:38:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:57,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-07 00:38:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:57,583 INFO L225 Difference]: With dead ends: 1467 [2019-11-07 00:38:57,584 INFO L226 Difference]: Without dead ends: 752 [2019-11-07 00:38:57,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-11-07 00:38:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2019-11-07 00:38:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-11-07 00:38:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-11-07 00:38:57,635 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-11-07 00:38:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:57,636 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-11-07 00:38:57,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-11-07 00:38:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:38:57,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:57,647 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:57,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:57,857 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -32158381, now seen corresponding path program 1 times [2019-11-07 00:38:57,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:57,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584349206] [2019-11-07 00:38:57,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:58,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584349206] [2019-11-07 00:38:58,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506496139] [2019-11-07 00:38:58,048 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 [2019-11-07 00:38:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:58,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:58,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:58,672 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:59,015 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:59,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:59,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874499829] [2019-11-07 00:38:59,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:59,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:59,021 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 7 states. [2019-11-07 00:38:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:59,308 INFO L93 Difference]: Finished difference Result 1471 states and 2346 transitions. [2019-11-07 00:38:59,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:59,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-11-07 00:38:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:59,322 INFO L225 Difference]: With dead ends: 1471 [2019-11-07 00:38:59,322 INFO L226 Difference]: Without dead ends: 762 [2019-11-07 00:38:59,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-11-07 00:38:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 750. [2019-11-07 00:38:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-11-07 00:38:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-11-07 00:38:59,373 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-11-07 00:38:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:59,373 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-11-07 00:38:59,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-11-07 00:38:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:38:59,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:59,383 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:59,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:59,594 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:59,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1189046705, now seen corresponding path program 1 times [2019-11-07 00:38:59,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:59,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615650785] [2019-11-07 00:38:59,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:59,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615650785] [2019-11-07 00:38:59,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221622624] [2019-11-07 00:38:59,728 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 [2019-11-07 00:39:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:00,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:39:00,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:39:00,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:00,492 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:00,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:39:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845361468] [2019-11-07 00:39:00,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:00,494 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:00,495 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 5 states. [2019-11-07 00:39:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:00,588 INFO L93 Difference]: Finished difference Result 1447 states and 2313 transitions. [2019-11-07 00:39:00,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:00,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-11-07 00:39:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:00,595 INFO L225 Difference]: With dead ends: 1447 [2019-11-07 00:39:00,595 INFO L226 Difference]: Without dead ends: 750 [2019-11-07 00:39:00,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2019-11-07 00:39:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2019-11-07 00:39:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-11-07 00:39:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1185 transitions. [2019-11-07 00:39:00,626 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1185 transitions. Word has length 169 [2019-11-07 00:39:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:00,627 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1185 transitions. [2019-11-07 00:39:00,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1185 transitions. [2019-11-07 00:39:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:39:00,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:00,633 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:00,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:00,839 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1058024854, now seen corresponding path program 1 times [2019-11-07 00:39:00,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:00,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615196045] [2019-11-07 00:39:00,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:01,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615196045] [2019-11-07 00:39:01,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008420782] [2019-11-07 00:39:01,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:01,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:39:01,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:01,746 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:01,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:01,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:39:01,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230454101] [2019-11-07 00:39:01,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:01,889 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:01,890 INFO L87 Difference]: Start difference. First operand 750 states and 1185 transitions. Second operand 5 states. [2019-11-07 00:39:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:02,094 INFO L93 Difference]: Finished difference Result 1443 states and 2304 transitions. [2019-11-07 00:39:02,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:02,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-11-07 00:39:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:02,104 INFO L225 Difference]: With dead ends: 1443 [2019-11-07 00:39:02,105 INFO L226 Difference]: Without dead ends: 792 [2019-11-07 00:39:02,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2019-11-07 00:39:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 789. [2019-11-07 00:39:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-11-07 00:39:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1258 transitions. [2019-11-07 00:39:02,142 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1258 transitions. Word has length 170 [2019-11-07 00:39:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:02,142 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1258 transitions. [2019-11-07 00:39:02,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1258 transitions. [2019-11-07 00:39:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:39:02,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:02,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:02,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:02,360 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2107428973, now seen corresponding path program 1 times [2019-11-07 00:39:02,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:02,361 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866840971] [2019-11-07 00:39:02,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:02,509 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866840971] [2019-11-07 00:39:02,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021166809] [2019-11-07 00:39:02,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:03,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:39:03,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:39:03,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:39:03,476 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:03,476 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:39:03,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843724269] [2019-11-07 00:39:03,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:39:03,477 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:39:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:03,477 INFO L87 Difference]: Start difference. First operand 789 states and 1258 transitions. Second operand 11 states. [2019-11-07 00:39:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:03,650 INFO L93 Difference]: Finished difference Result 1463 states and 2328 transitions. [2019-11-07 00:39:03,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:03,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-11-07 00:39:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:03,658 INFO L225 Difference]: With dead ends: 1463 [2019-11-07 00:39:03,658 INFO L226 Difference]: Without dead ends: 812 [2019-11-07 00:39:03,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-11-07 00:39:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 796. [2019-11-07 00:39:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-11-07 00:39:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1267 transitions. [2019-11-07 00:39:03,698 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1267 transitions. Word has length 171 [2019-11-07 00:39:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:03,699 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1267 transitions. [2019-11-07 00:39:03,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:39:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1267 transitions. [2019-11-07 00:39:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-07 00:39:03,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:03,707 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:03,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:03,916 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash 863803383, now seen corresponding path program 1 times [2019-11-07 00:39:03,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:03,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261100555] [2019-11-07 00:39:03,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:04,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261100555] [2019-11-07 00:39:04,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395241577] [2019-11-07 00:39:04,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:04,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:39:04,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:39:04,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:04,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:04,887 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-11-07 00:39:04,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674806150] [2019-11-07 00:39:04,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:04,890 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:04,890 INFO L87 Difference]: Start difference. First operand 796 states and 1267 transitions. Second operand 6 states. [2019-11-07 00:39:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:04,977 INFO L93 Difference]: Finished difference Result 1505 states and 2403 transitions. [2019-11-07 00:39:04,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:04,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-11-07 00:39:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:04,983 INFO L225 Difference]: With dead ends: 1505 [2019-11-07 00:39:04,984 INFO L226 Difference]: Without dead ends: 796 [2019-11-07 00:39:04,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2019-11-07 00:39:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2019-11-07 00:39:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-11-07 00:39:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1264 transitions. [2019-11-07 00:39:05,013 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1264 transitions. Word has length 173 [2019-11-07 00:39:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:05,013 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1264 transitions. [2019-11-07 00:39:05,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1264 transitions. [2019-11-07 00:39:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 00:39:05,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:05,019 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:05,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:05,235 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash 674320387, now seen corresponding path program 1 times [2019-11-07 00:39:05,236 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:05,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858747523] [2019-11-07 00:39:05,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:05,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858747523] [2019-11-07 00:39:05,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258065264] [2019-11-07 00:39:05,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:06,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:06,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:06,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:06,410 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:06,410 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:39:06,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233678568] [2019-11-07 00:39:06,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:06,411 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:06,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:06,411 INFO L87 Difference]: Start difference. First operand 796 states and 1264 transitions. Second operand 5 states. [2019-11-07 00:39:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:07,305 INFO L93 Difference]: Finished difference Result 1451 states and 2341 transitions. [2019-11-07 00:39:07,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:07,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-11-07 00:39:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:07,314 INFO L225 Difference]: With dead ends: 1451 [2019-11-07 00:39:07,314 INFO L226 Difference]: Without dead ends: 804 [2019-11-07 00:39:07,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-11-07 00:39:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2019-11-07 00:39:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-11-07 00:39:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1277 transitions. [2019-11-07 00:39:07,374 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1277 transitions. Word has length 174 [2019-11-07 00:39:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:07,376 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1277 transitions. [2019-11-07 00:39:07,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1277 transitions. [2019-11-07 00:39:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 00:39:07,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:07,384 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:07,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:07,593 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1642697509, now seen corresponding path program 1 times [2019-11-07 00:39:07,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:07,599 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389103899] [2019-11-07 00:39:07,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:39:07,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389103899] [2019-11-07 00:39:07,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559664425] [2019-11-07 00:39:07,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:08,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:08,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:08,397 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:08,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:08,680 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:39:08,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545148231] [2019-11-07 00:39:08,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:08,681 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:08,681 INFO L87 Difference]: Start difference. First operand 804 states and 1277 transitions. Second operand 5 states. [2019-11-07 00:39:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:09,687 INFO L93 Difference]: Finished difference Result 1467 states and 2364 transitions. [2019-11-07 00:39:09,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:09,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-11-07 00:39:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:09,694 INFO L225 Difference]: With dead ends: 1467 [2019-11-07 00:39:09,694 INFO L226 Difference]: Without dead ends: 812 [2019-11-07 00:39:09,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-11-07 00:39:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2019-11-07 00:39:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-11-07 00:39:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1290 transitions. [2019-11-07 00:39:09,724 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1290 transitions. Word has length 176 [2019-11-07 00:39:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:09,724 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1290 transitions. [2019-11-07 00:39:09,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1290 transitions. [2019-11-07 00:39:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:39:09,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:09,731 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:09,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:09,938 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1977942659, now seen corresponding path program 1 times [2019-11-07 00:39:09,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:09,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39487354] [2019-11-07 00:39:09,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:10,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39487354] [2019-11-07 00:39:10,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613603929] [2019-11-07 00:39:10,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:10,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:10,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:10,721 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:11,007 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:11,007 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:39:11,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838200839] [2019-11-07 00:39:11,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:11,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:11,008 INFO L87 Difference]: Start difference. First operand 812 states and 1290 transitions. Second operand 5 states. [2019-11-07 00:39:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:11,957 INFO L93 Difference]: Finished difference Result 1483 states and 2387 transitions. [2019-11-07 00:39:11,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:11,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-11-07 00:39:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:11,963 INFO L225 Difference]: With dead ends: 1483 [2019-11-07 00:39:11,964 INFO L226 Difference]: Without dead ends: 820 [2019-11-07 00:39:11,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-11-07 00:39:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2019-11-07 00:39:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2019-11-07 00:39:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1303 transitions. [2019-11-07 00:39:12,045 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1303 transitions. Word has length 178 [2019-11-07 00:39:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:12,046 INFO L462 AbstractCegarLoop]: Abstraction has 820 states and 1303 transitions. [2019-11-07 00:39:12,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:12,046 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1303 transitions. [2019-11-07 00:39:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:12,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:12,052 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:12,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:12,259 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1043965741, now seen corresponding path program 1 times [2019-11-07 00:39:12,260 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:12,260 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911480805] [2019-11-07 00:39:12,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:12,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911480805] [2019-11-07 00:39:12,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162798259] [2019-11-07 00:39:12,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:12,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:12,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:12,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:13,250 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:13,250 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-11-07 00:39:13,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315556000] [2019-11-07 00:39:13,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:13,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:13,251 INFO L87 Difference]: Start difference. First operand 820 states and 1303 transitions. Second operand 5 states. [2019-11-07 00:39:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:14,171 INFO L93 Difference]: Finished difference Result 1499 states and 2410 transitions. [2019-11-07 00:39:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:14,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-11-07 00:39:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:14,178 INFO L225 Difference]: With dead ends: 1499 [2019-11-07 00:39:14,178 INFO L226 Difference]: Without dead ends: 828 [2019-11-07 00:39:14,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-11-07 00:39:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-11-07 00:39:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-07 00:39:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1316 transitions. [2019-11-07 00:39:14,210 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1316 transitions. Word has length 180 [2019-11-07 00:39:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:14,211 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1316 transitions. [2019-11-07 00:39:14,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1316 transitions. [2019-11-07 00:39:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-07 00:39:14,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:14,217 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:14,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:14,424 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 567339875, now seen corresponding path program 1 times [2019-11-07 00:39:14,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:14,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092004267] [2019-11-07 00:39:14,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:14,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092004267] [2019-11-07 00:39:14,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628581592] [2019-11-07 00:39:14,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:15,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:39:15,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:15,271 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:15,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:15,381 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 00:39:15,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020893359] [2019-11-07 00:39:15,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:15,382 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:15,382 INFO L87 Difference]: Start difference. First operand 828 states and 1316 transitions. Second operand 4 states. [2019-11-07 00:39:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:15,449 INFO L93 Difference]: Finished difference Result 1615 states and 2588 transitions. [2019-11-07 00:39:15,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:15,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-11-07 00:39:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:15,454 INFO L225 Difference]: With dead ends: 1615 [2019-11-07 00:39:15,454 INFO L226 Difference]: Without dead ends: 805 [2019-11-07 00:39:15,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2019-11-07 00:39:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2019-11-07 00:39:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-11-07 00:39:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1273 transitions. [2019-11-07 00:39:15,483 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1273 transitions. Word has length 182 [2019-11-07 00:39:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:15,483 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 1273 transitions. [2019-11-07 00:39:15,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1273 transitions. [2019-11-07 00:39:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:15,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:15,489 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:15,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:15,697 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1660003128, now seen corresponding path program 1 times [2019-11-07 00:39:15,698 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:15,698 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059604508] [2019-11-07 00:39:15,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:15,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059604508] [2019-11-07 00:39:15,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948861258] [2019-11-07 00:39:15,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:16,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:39:16,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:16,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:16,764 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:16,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-11-07 00:39:16,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553248237] [2019-11-07 00:39:16,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:16,765 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:16,766 INFO L87 Difference]: Start difference. First operand 805 states and 1273 transitions. Second operand 7 states. [2019-11-07 00:39:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:16,867 INFO L93 Difference]: Finished difference Result 1564 states and 2481 transitions. [2019-11-07 00:39:16,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:16,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-11-07 00:39:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:16,873 INFO L225 Difference]: With dead ends: 1564 [2019-11-07 00:39:16,873 INFO L226 Difference]: Without dead ends: 807 [2019-11-07 00:39:16,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2019-11-07 00:39:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2019-11-07 00:39:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-11-07 00:39:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2019-11-07 00:39:16,902 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 180 [2019-11-07 00:39:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:16,903 INFO L462 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2019-11-07 00:39:16,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2019-11-07 00:39:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:16,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:16,908 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:17,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:17,116 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2098072582, now seen corresponding path program 1 times [2019-11-07 00:39:17,117 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:17,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44683058] [2019-11-07 00:39:17,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:17,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44683058] [2019-11-07 00:39:17,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523945039] [2019-11-07 00:39:17,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:17,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:39:17,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:18,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:18,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:39:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:39:18,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:18,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-11-07 00:39:18,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432664457] [2019-11-07 00:39:18,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:18,420 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:39:18,421 INFO L87 Difference]: Start difference. First operand 799 states and 1259 transitions. Second operand 9 states. [2019-11-07 00:39:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:18,627 INFO L93 Difference]: Finished difference Result 1558 states and 2468 transitions. [2019-11-07 00:39:18,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:39:18,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2019-11-07 00:39:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:18,634 INFO L225 Difference]: With dead ends: 1558 [2019-11-07 00:39:18,635 INFO L226 Difference]: Without dead ends: 808 [2019-11-07 00:39:18,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 345 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2019-11-07 00:39:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 801. [2019-11-07 00:39:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2019-11-07 00:39:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1263 transitions. [2019-11-07 00:39:18,668 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1263 transitions. Word has length 180 [2019-11-07 00:39:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:18,668 INFO L462 AbstractCegarLoop]: Abstraction has 801 states and 1263 transitions. [2019-11-07 00:39:18,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:39:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1263 transitions. [2019-11-07 00:39:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 00:39:18,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:18,676 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:18,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:18,883 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1574582741, now seen corresponding path program 1 times [2019-11-07 00:39:18,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:18,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122651490] [2019-11-07 00:39:18,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:19,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122651490] [2019-11-07 00:39:19,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614122327] [2019-11-07 00:39:19,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:19,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:39:19,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:19,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:20,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms