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_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:25,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:25,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:25,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:25,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:25,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:25,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:25,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:25,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:25,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:25,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:25,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:25,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:25,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:25,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:25,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:25,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:25,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:25,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:25,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:25,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:25,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:25,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:25,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:25,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:25,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:25,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:25,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:25,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:25,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:25,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:25,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:25,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:25,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:25,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:25,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:25,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:25,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:25,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:25,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:25,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:25,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:25,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:25,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:25,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:25,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:25,430 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:25,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:25,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:25,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:25,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:25,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:25,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:25,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:25,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:25,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:25,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:25,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:25,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:25,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:25,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:25,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:25,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:25,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:25,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:25,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:25,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:25,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:25,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:25,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:25,436 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 [2019-10-13 21:08:25,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:25,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:25,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:25,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:25,733 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:25,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-10-13 21:08:25,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229605847/bddb83ffc6e547eaa00972a62139b517/FLAGcb896dd20 [2019-10-13 21:08:26,361 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:26,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-10-13 21:08:26,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229605847/bddb83ffc6e547eaa00972a62139b517/FLAGcb896dd20 [2019-10-13 21:08:26,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229605847/bddb83ffc6e547eaa00972a62139b517 [2019-10-13 21:08:26,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:26,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:26,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:26,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:26,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:26,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:26" (1/1) ... [2019-10-13 21:08:26,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1dec4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:26, skipping insertion in model container [2019-10-13 21:08:26,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:26" (1/1) ... [2019-10-13 21:08:26,669 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:26,744 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:27,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:27,418 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:27,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:27,636 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:27,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27 WrapperNode [2019-10-13 21:08:27,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:27,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:27,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:27,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:27,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... [2019-10-13 21:08:27,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:27,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:27,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:27,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:27,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:27,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:27,936 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:27,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:27,938 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:27,938 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:27,941 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:27,942 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:27,944 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:27,945 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:27,946 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:27,946 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:27,946 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:27,946 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:27,946 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:27,947 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:27,947 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:27,947 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:27,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:27,951 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:27,952 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:27,952 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:27,952 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:27,952 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:27,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:27,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:27,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:27,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:27,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:27,956 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:27,956 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:27,956 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:27,957 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:27,957 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:27,957 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:27,957 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:27,968 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:27,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:27,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:27,968 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:30,134 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:30,135 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:30,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:30 BoogieIcfgContainer [2019-10-13 21:08:30,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:30,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:30,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:30,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:30,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:26" (1/3) ... [2019-10-13 21:08:30,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5937081b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:30, skipping insertion in model container [2019-10-13 21:08:30,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:27" (2/3) ... [2019-10-13 21:08:30,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5937081b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:30, skipping insertion in model container [2019-10-13 21:08:30,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:30" (3/3) ... [2019-10-13 21:08:30,147 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2019-10-13 21:08:30,157 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:30,171 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:30,185 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:30,239 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:30,239 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:30,239 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:30,239 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:30,240 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:30,240 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:30,240 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:30,240 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states. [2019-10-13 21:08:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:08:30,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:30,338 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:30,343 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1684388016, now seen corresponding path program 1 times [2019-10-13 21:08:30,364 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:30,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839628118] [2019-10-13 21:08:30,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:30,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:30,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:31,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839628118] [2019-10-13 21:08:31,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137786502] [2019-10-13 21:08:31,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:31,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:31,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:31,925 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:32,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:32,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:32,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750669768] [2019-10-13 21:08:32,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:32,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:32,132 INFO L87 Difference]: Start difference. First operand 788 states. Second operand 4 states. [2019-10-13 21:08:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:32,384 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2019-10-13 21:08:32,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:32,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:08:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:32,414 INFO L225 Difference]: With dead ends: 1291 [2019-10-13 21:08:32,414 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:08:32,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:08:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:08:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:08:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1038 transitions. [2019-10-13 21:08:32,564 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1038 transitions. Word has length 152 [2019-10-13 21:08:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:32,564 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1038 transitions. [2019-10-13 21:08:32,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1038 transitions. [2019-10-13 21:08:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:08:32,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:32,582 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:32,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:32,789 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 940432692, now seen corresponding path program 1 times [2019-10-13 21:08:32,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:32,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978261248] [2019-10-13 21:08:32,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:32,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:32,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:33,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978261248] [2019-10-13 21:08:33,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725194722] [2019-10-13 21:08:33,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:33,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:33,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:33,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:33,863 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:33,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:33,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049645841] [2019-10-13 21:08:33,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:33,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:33,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:33,866 INFO L87 Difference]: Start difference. First operand 651 states and 1038 transitions. Second operand 4 states. [2019-10-13 21:08:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:34,114 INFO L93 Difference]: Finished difference Result 1313 states and 2123 transitions. [2019-10-13 21:08:34,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:34,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 21:08:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:34,122 INFO L225 Difference]: With dead ends: 1313 [2019-10-13 21:08:34,122 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:08:34,127 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:08:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-13 21:08:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:08:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1112 transitions. [2019-10-13 21:08:34,167 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1112 transitions. Word has length 154 [2019-10-13 21:08:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:34,168 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1112 transitions. [2019-10-13 21:08:34,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1112 transitions. [2019-10-13 21:08:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:08:34,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:34,174 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:34,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:34,381 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:34,382 INFO L82 PathProgramCache]: Analyzing trace with hash 723677314, now seen corresponding path program 1 times [2019-10-13 21:08:34,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:34,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252774877] [2019-10-13 21:08:34,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:34,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:34,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:34,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252774877] [2019-10-13 21:08:34,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469905919] [2019-10-13 21:08:34,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:35,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:35,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:35,334 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:35,630 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:35,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:35,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577525614] [2019-10-13 21:08:35,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:35,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:35,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:35,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:35,632 INFO L87 Difference]: Start difference. First operand 690 states and 1112 transitions. Second operand 7 states. [2019-10-13 21:08:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:35,825 INFO L93 Difference]: Finished difference Result 1366 states and 2214 transitions. [2019-10-13 21:08:35,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:35,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 156 [2019-10-13 21:08:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:35,834 INFO L225 Difference]: With dead ends: 1366 [2019-10-13 21:08:35,834 INFO L226 Difference]: Without dead ends: 704 [2019-10-13 21:08:35,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-13 21:08:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2019-10-13 21:08:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:08:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1123 transitions. [2019-10-13 21:08:35,893 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1123 transitions. Word has length 156 [2019-10-13 21:08:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:35,893 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1123 transitions. [2019-10-13 21:08:35,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1123 transitions. [2019-10-13 21:08:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:08:35,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:35,899 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:36,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:36,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -336665820, now seen corresponding path program 1 times [2019-10-13 21:08:36,116 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:36,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106134921] [2019-10-13 21:08:36,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:36,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106134921] [2019-10-13 21:08:36,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684096413] [2019-10-13 21:08:36,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:36,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:36,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:36,934 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:37,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:37,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:37,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227280619] [2019-10-13 21:08:37,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:37,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:37,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:37,105 INFO L87 Difference]: Start difference. First operand 697 states and 1123 transitions. Second operand 4 states. [2019-10-13 21:08:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:37,199 INFO L93 Difference]: Finished difference Result 1379 states and 2234 transitions. [2019-10-13 21:08:37,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:37,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-13 21:08:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:37,208 INFO L225 Difference]: With dead ends: 1379 [2019-10-13 21:08:37,208 INFO L226 Difference]: Without dead ends: 708 [2019-10-13 21:08:37,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2019-10-13 21:08:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2019-10-13 21:08:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-13 21:08:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1131 transitions. [2019-10-13 21:08:37,251 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1131 transitions. Word has length 157 [2019-10-13 21:08:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:37,251 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1131 transitions. [2019-10-13 21:08:37,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1131 transitions. [2019-10-13 21:08:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 21:08:37,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:37,260 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:37,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:37,468 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1075846183, now seen corresponding path program 1 times [2019-10-13 21:08:37,469 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:37,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149941728] [2019-10-13 21:08:37,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:37,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:37,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:37,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149941728] [2019-10-13 21:08:37,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186573477] [2019-10-13 21:08:37,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:38,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:38,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:38,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:38,542 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:38,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:38,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989881330] [2019-10-13 21:08:38,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:38,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:38,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:38,545 INFO L87 Difference]: Start difference. First operand 706 states and 1131 transitions. Second operand 5 states. [2019-10-13 21:08:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:38,638 INFO L93 Difference]: Finished difference Result 1359 states and 2195 transitions. [2019-10-13 21:08:38,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:38,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-13 21:08:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:38,645 INFO L225 Difference]: With dead ends: 1359 [2019-10-13 21:08:38,645 INFO L226 Difference]: Without dead ends: 706 [2019-10-13 21:08:38,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-13 21:08:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2019-10-13 21:08:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-13 21:08:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1126 transitions. [2019-10-13 21:08:38,682 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1126 transitions. Word has length 160 [2019-10-13 21:08:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:38,682 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1126 transitions. [2019-10-13 21:08:38,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1126 transitions. [2019-10-13 21:08:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:38,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:38,689 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:08:38,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:38,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 272976111, now seen corresponding path program 1 times [2019-10-13 21:08:38,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:38,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244551243] [2019-10-13 21:08:38,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:38,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:39,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244551243] [2019-10-13 21:08:39,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281014339] [2019-10-13 21:08:39,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:39,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:39,768 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:39,904 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:39,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:39,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057405115] [2019-10-13 21:08:39,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:39,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:39,910 INFO L87 Difference]: Start difference. First operand 706 states and 1126 transitions. Second operand 5 states. [2019-10-13 21:08:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:40,147 INFO L93 Difference]: Finished difference Result 1355 states and 2186 transitions. [2019-10-13 21:08:40,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:40,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 21:08:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:40,156 INFO L225 Difference]: With dead ends: 1355 [2019-10-13 21:08:40,156 INFO L226 Difference]: Without dead ends: 748 [2019-10-13 21:08:40,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-13 21:08:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2019-10-13 21:08:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 21:08:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1199 transitions. [2019-10-13 21:08:40,199 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1199 transitions. Word has length 161 [2019-10-13 21:08:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:40,201 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1199 transitions. [2019-10-13 21:08:40,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1199 transitions. [2019-10-13 21:08:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:08:40,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:40,207 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-10-13 21:08:40,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:40,425 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1911239619, now seen corresponding path program 1 times [2019-10-13 21:08:40,425 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:40,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913909276] [2019-10-13 21:08:40,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:40,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913909276] [2019-10-13 21:08:40,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137062672] [2019-10-13 21:08:40,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:41,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:41,207 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:41,517 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:41,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:41,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213833462] [2019-10-13 21:08:41,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:41,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:41,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:41,522 INFO L87 Difference]: Start difference. First operand 745 states and 1199 transitions. Second operand 11 states. [2019-10-13 21:08:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:41,783 INFO L93 Difference]: Finished difference Result 1372 states and 2206 transitions. [2019-10-13 21:08:41,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:41,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 162 [2019-10-13 21:08:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:41,793 INFO L225 Difference]: With dead ends: 1372 [2019-10-13 21:08:41,794 INFO L226 Difference]: Without dead ends: 765 [2019-10-13 21:08:41,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-10-13 21:08:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 752. [2019-10-13 21:08:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 21:08:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1208 transitions. [2019-10-13 21:08:41,845 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1208 transitions. Word has length 162 [2019-10-13 21:08:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:41,846 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1208 transitions. [2019-10-13 21:08:41,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1208 transitions. [2019-10-13 21:08:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:08:41,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:41,855 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:42,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:42,076 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1909112071, now seen corresponding path program 1 times [2019-10-13 21:08:42,077 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:42,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308926409] [2019-10-13 21:08:42,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:42,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:42,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:42,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308926409] [2019-10-13 21:08:42,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029563549] [2019-10-13 21:08:42,232 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 [2019-10-13 21:08:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:42,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:42,894 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:43,036 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:43,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:43,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292847538] [2019-10-13 21:08:43,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:43,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:43,038 INFO L87 Difference]: Start difference. First operand 752 states and 1208 transitions. Second operand 6 states. [2019-10-13 21:08:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:43,139 INFO L93 Difference]: Finished difference Result 1417 states and 2285 transitions. [2019-10-13 21:08:43,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:43,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-10-13 21:08:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:43,147 INFO L225 Difference]: With dead ends: 1417 [2019-10-13 21:08:43,148 INFO L226 Difference]: Without dead ends: 752 [2019-10-13 21:08:43,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-13 21:08:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2019-10-13 21:08:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 21:08:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1205 transitions. [2019-10-13 21:08:43,191 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1205 transitions. Word has length 164 [2019-10-13 21:08:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:43,192 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1205 transitions. [2019-10-13 21:08:43,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1205 transitions. [2019-10-13 21:08:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:08:43,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:43,199 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:43,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:43,403 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -316063958, now seen corresponding path program 1 times [2019-10-13 21:08:43,404 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:43,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060959248] [2019-10-13 21:08:43,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:43,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060959248] [2019-10-13 21:08:43,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565595005] [2019-10-13 21:08:43,567 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 [2019-10-13 21:08:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:08:44,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:44,177 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:44,293 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:44,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:08:44,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820645793] [2019-10-13 21:08:44,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:44,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:08:44,295 INFO L87 Difference]: Start difference. First operand 752 states and 1205 transitions. Second operand 4 states. [2019-10-13 21:08:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:44,365 INFO L93 Difference]: Finished difference Result 1463 states and 2366 transitions. [2019-10-13 21:08:44,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:44,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-13 21:08:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:44,373 INFO L225 Difference]: With dead ends: 1463 [2019-10-13 21:08:44,373 INFO L226 Difference]: Without dead ends: 735 [2019-10-13 21:08:44,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-13 21:08:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2019-10-13 21:08:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-10-13 21:08:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1176 transitions. [2019-10-13 21:08:44,407 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1176 transitions. Word has length 165 [2019-10-13 21:08:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:44,407 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1176 transitions. [2019-10-13 21:08:44,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1176 transitions. [2019-10-13 21:08:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:08:44,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:44,414 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:44,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:44,623 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 702741203, now seen corresponding path program 1 times [2019-10-13 21:08:44,623 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:44,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698728461] [2019-10-13 21:08:44,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:44,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698728461] [2019-10-13 21:08:44,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371714995] [2019-10-13 21:08:44,765 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 [2019-10-13 21:08:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:45,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:45,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:45,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:45,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:45,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849096243] [2019-10-13 21:08:45,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:45,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:45,741 INFO L87 Difference]: Start difference. First operand 735 states and 1176 transitions. Second operand 7 states. [2019-10-13 21:08:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:45,854 INFO L93 Difference]: Finished difference Result 1418 states and 2274 transitions. [2019-10-13 21:08:45,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:45,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-10-13 21:08:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:45,860 INFO L225 Difference]: With dead ends: 1418 [2019-10-13 21:08:45,860 INFO L226 Difference]: Without dead ends: 737 [2019-10-13 21:08:45,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-13 21:08:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 729. [2019-10-13 21:08:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-13 21:08:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1162 transitions. [2019-10-13 21:08:45,891 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1162 transitions. Word has length 162 [2019-10-13 21:08:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:45,892 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1162 transitions. [2019-10-13 21:08:45,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1162 transitions. [2019-10-13 21:08:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:08:45,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,899 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:46,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,112 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1210154117, now seen corresponding path program 1 times [2019-10-13 21:08:46,112 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:46,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823029117] [2019-10-13 21:08:46,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:46,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823029117] [2019-10-13 21:08:46,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673786105] [2019-10-13 21:08:46,246 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 [2019-10-13 21:08:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:46,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:46,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:47,199 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:47,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:08:47,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68100291] [2019-10-13 21:08:47,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:47,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:47,201 INFO L87 Difference]: Start difference. First operand 729 states and 1162 transitions. Second operand 7 states. [2019-10-13 21:08:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,344 INFO L93 Difference]: Finished difference Result 1412 states and 2259 transitions. [2019-10-13 21:08:47,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:47,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-10-13 21:08:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,351 INFO L225 Difference]: With dead ends: 1412 [2019-10-13 21:08:47,351 INFO L226 Difference]: Without dead ends: 731 [2019-10-13 21:08:47,356 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-13 21:08:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 723. [2019-10-13 21:08:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-10-13 21:08:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1148 transitions. [2019-10-13 21:08:47,436 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1148 transitions. Word has length 163 [2019-10-13 21:08:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,437 INFO L462 AbstractCegarLoop]: Abstraction has 723 states and 1148 transitions. [2019-10-13 21:08:47,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1148 transitions. [2019-10-13 21:08:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:08:47,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:47,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,652 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1856385415, now seen corresponding path program 1 times [2019-10-13 21:08:47,653 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90816987] [2019-10-13 21:08:47,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:47,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90816987] [2019-10-13 21:08:47,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15014879] [2019-10-13 21:08:47,781 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 [2019-10-13 21:08:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:08:48,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:48,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:08:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:08:48,822 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:48,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:08:48,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198044698] [2019-10-13 21:08:48,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:08:48,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:08:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:08:48,824 INFO L87 Difference]: Start difference. First operand 723 states and 1148 transitions. Second operand 9 states. [2019-10-13 21:08:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,072 INFO L93 Difference]: Finished difference Result 1406 states and 2246 transitions. [2019-10-13 21:08:49,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:08:49,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-10-13 21:08:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,080 INFO L225 Difference]: With dead ends: 1406 [2019-10-13 21:08:49,080 INFO L226 Difference]: Without dead ends: 732 [2019-10-13 21:08:49,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:08:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2019-10-13 21:08:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 725. [2019-10-13 21:08:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-13 21:08:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-10-13 21:08:49,116 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 163 [2019-10-13 21:08:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,116 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-10-13 21:08:49,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:08:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-10-13 21:08:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:08:49,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,121 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:49,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,330 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1306761489, now seen corresponding path program 1 times [2019-10-13 21:08:49,331 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703331248] [2019-10-13 21:08:49,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:49,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703331248] [2019-10-13 21:08:49,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168600675] [2019-10-13 21:08:49,464 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 [2019-10-13 21:08:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:50,208 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:08:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:08:50,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:50,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:08:50,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711107447] [2019-10-13 21:08:50,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:08:50,537 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:08:50,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:08:50,537 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 9 states. [2019-10-13 21:08:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,760 INFO L93 Difference]: Finished difference Result 1411 states and 2259 transitions. [2019-10-13 21:08:50,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:08:50,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-10-13 21:08:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,769 INFO L225 Difference]: With dead ends: 1411 [2019-10-13 21:08:50,769 INFO L226 Difference]: Without dead ends: 735 [2019-10-13 21:08:50,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:08:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-13 21:08:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 725. [2019-10-13 21:08:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-13 21:08:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-10-13 21:08:50,811 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 164 [2019-10-13 21:08:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,812 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-10-13 21:08:50,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:08:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-10-13 21:08:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:08:50,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,820 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:51,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,030 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash 736360994, now seen corresponding path program 1 times [2019-10-13 21:08:51,031 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:51,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216456572] [2019-10-13 21:08:51,032 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,032 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:51,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216456572] [2019-10-13 21:08:51,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294207941] [2019-10-13 21:08:51,152 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 [2019-10-13 21:08:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:51,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:52,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:08:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:08:52,194 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:52,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:08:52,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350411776] [2019-10-13 21:08:52,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:08:52,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:08:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:52,196 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 9 states. [2019-10-13 21:08:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:52,438 INFO L93 Difference]: Finished difference Result 1411 states and 2259 transitions. [2019-10-13 21:08:52,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:08:52,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2019-10-13 21:08:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,445 INFO L225 Difference]: With dead ends: 1411 [2019-10-13 21:08:52,445 INFO L226 Difference]: Without dead ends: 735 [2019-10-13 21:08:52,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:08:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-13 21:08:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 725. [2019-10-13 21:08:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-13 21:08:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-10-13 21:08:52,483 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 165 [2019-10-13 21:08:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,484 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-10-13 21:08:52,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:08:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-10-13 21:08:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:08:52,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,490 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:52,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,699 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash 965077226, now seen corresponding path program 1 times [2019-10-13 21:08:52,700 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870719043] [2019-10-13 21:08:52,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:52,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870719043] [2019-10-13 21:08:52,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73534727] [2019-10-13 21:08:52,883 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 [2019-10-13 21:08:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:53,542 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:53,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:53,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-10-13 21:08:53,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882557313] [2019-10-13 21:08:53,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:53,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:53,715 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 7 states. [2019-10-13 21:08:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,832 INFO L93 Difference]: Finished difference Result 1408 states and 2252 transitions. [2019-10-13 21:08:53,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:53,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-10-13 21:08:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,838 INFO L225 Difference]: With dead ends: 1408 [2019-10-13 21:08:53,838 INFO L226 Difference]: Without dead ends: 724 [2019-10-13 21:08:53,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:08:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-10-13 21:08:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 718. [2019-10-13 21:08:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-13 21:08:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1136 transitions. [2019-10-13 21:08:53,868 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1136 transitions. Word has length 166 [2019-10-13 21:08:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,868 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1136 transitions. [2019-10-13 21:08:53,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1136 transitions. [2019-10-13 21:08:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:08:53,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,874 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:54,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,089 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1270864186, now seen corresponding path program 1 times [2019-10-13 21:08:54,090 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472357746] [2019-10-13 21:08:54,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:54,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472357746] [2019-10-13 21:08:54,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:54,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:08:54,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554149111] [2019-10-13 21:08:54,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:54,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:54,206 INFO L87 Difference]: Start difference. First operand 718 states and 1136 transitions. Second operand 4 states. [2019-10-13 21:08:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,253 INFO L93 Difference]: Finished difference Result 1372 states and 2196 transitions. [2019-10-13 21:08:54,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:54,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-13 21:08:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,258 INFO L225 Difference]: With dead ends: 1372 [2019-10-13 21:08:54,258 INFO L226 Difference]: Without dead ends: 702 [2019-10-13 21:08:54,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:08:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-13 21:08:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2019-10-13 21:08:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-10-13 21:08:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1110 transitions. [2019-10-13 21:08:54,282 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1110 transitions. Word has length 167 [2019-10-13 21:08:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,282 INFO L462 AbstractCegarLoop]: Abstraction has 702 states and 1110 transitions. [2019-10-13 21:08:54,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1110 transitions. [2019-10-13 21:08:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:08:54,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,289 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:54,289 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1775248219, now seen corresponding path program 1 times [2019-10-13 21:08:54,290 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017251462] [2019-10-13 21:08:54,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:54,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017251462] [2019-10-13 21:08:54,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:54,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:08:54,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190372246] [2019-10-13 21:08:54,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:54,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:54,419 INFO L87 Difference]: Start difference. First operand 702 states and 1110 transitions. Second operand 7 states. [2019-10-13 21:08:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,527 INFO L93 Difference]: Finished difference Result 1317 states and 2102 transitions. [2019-10-13 21:08:54,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:54,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-13 21:08:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,532 INFO L225 Difference]: With dead ends: 1317 [2019-10-13 21:08:54,533 INFO L226 Difference]: Without dead ends: 685 [2019-10-13 21:08:54,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-13 21:08:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2019-10-13 21:08:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:08:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1070 transitions. [2019-10-13 21:08:54,558 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1070 transitions. Word has length 165 [2019-10-13 21:08:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,558 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1070 transitions. [2019-10-13 21:08:54,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1070 transitions. [2019-10-13 21:08:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:08:54,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,563 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:54,564 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1063566161, now seen corresponding path program 1 times [2019-10-13 21:08:54,564 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351631453] [2019-10-13 21:08:54,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:08:54,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351631453] [2019-10-13 21:08:54,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:54,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:08:54,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600410361] [2019-10-13 21:08:54,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:54,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:54,772 INFO L87 Difference]: Start difference. First operand 682 states and 1070 transitions. Second operand 11 states. [2019-10-13 21:08:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,148 INFO L93 Difference]: Finished difference Result 1302 states and 2070 transitions. [2019-10-13 21:08:55,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:08:55,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2019-10-13 21:08:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,155 INFO L225 Difference]: With dead ends: 1302 [2019-10-13 21:08:55,156 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:08:55,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:08:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:08:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2019-10-13 21:08:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:08:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1069 transitions. [2019-10-13 21:08:55,185 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1069 transitions. Word has length 166 [2019-10-13 21:08:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,185 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1069 transitions. [2019-10-13 21:08:55,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1069 transitions. [2019-10-13 21:08:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:08:55,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,192 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:55,192 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash -130233765, now seen corresponding path program 1 times [2019-10-13 21:08:55,193 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597169355] [2019-10-13 21:08:55,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:08:55,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597169355] [2019-10-13 21:08:55,380 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:55,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:08:55,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338110300] [2019-10-13 21:08:55,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:55,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:55,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:55,383 INFO L87 Difference]: Start difference. First operand 682 states and 1069 transitions. Second operand 11 states. [2019-10-13 21:08:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,689 INFO L93 Difference]: Finished difference Result 1301 states and 2070 transitions. [2019-10-13 21:08:55,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:08:55,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 167 [2019-10-13 21:08:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,693 INFO L225 Difference]: With dead ends: 1301 [2019-10-13 21:08:55,694 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:08:55,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:08:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:08:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 688. [2019-10-13 21:08:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2019-10-13 21:08:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1076 transitions. [2019-10-13 21:08:55,717 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1076 transitions. Word has length 167 [2019-10-13 21:08:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,717 INFO L462 AbstractCegarLoop]: Abstraction has 688 states and 1076 transitions. [2019-10-13 21:08:55,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1076 transitions. [2019-10-13 21:08:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:08:55,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,723 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:55,724 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1764204204, now seen corresponding path program 1 times [2019-10-13 21:08:55,724 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175697669] [2019-10-13 21:08:55,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:08:55,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175697669] [2019-10-13 21:08:55,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:55,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:08:55,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778600739] [2019-10-13 21:08:55,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:55,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:55,851 INFO L87 Difference]: Start difference. First operand 688 states and 1076 transitions. Second operand 4 states. [2019-10-13 21:08:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:56,888 INFO L93 Difference]: Finished difference Result 1890 states and 3060 transitions. [2019-10-13 21:08:56,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:08:56,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:08:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:56,897 INFO L225 Difference]: With dead ends: 1890 [2019-10-13 21:08:56,897 INFO L226 Difference]: Without dead ends: 1279 [2019-10-13 21:08:56,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-10-13 21:08:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1273. [2019-10-13 21:08:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2019-10-13 21:08:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2024 transitions. [2019-10-13 21:08:56,941 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2024 transitions. Word has length 168 [2019-10-13 21:08:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:56,942 INFO L462 AbstractCegarLoop]: Abstraction has 1273 states and 2024 transitions. [2019-10-13 21:08:56,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2024 transitions. [2019-10-13 21:08:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:08:56,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:56,946 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:56,947 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1098694499, now seen corresponding path program 1 times [2019-10-13 21:08:56,947 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:56,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142132770] [2019-10-13 21:08:56,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:08:57,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142132770] [2019-10-13 21:08:57,061 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:57,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:08:57,061 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137036586] [2019-10-13 21:08:57,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:57,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:57,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:57,063 INFO L87 Difference]: Start difference. First operand 1273 states and 2024 transitions. Second operand 4 states. [2019-10-13 21:08:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:58,037 INFO L93 Difference]: Finished difference Result 3650 states and 5986 transitions. [2019-10-13 21:08:58,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:08:58,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 21:08:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:58,054 INFO L225 Difference]: With dead ends: 3650 [2019-10-13 21:08:58,055 INFO L226 Difference]: Without dead ends: 2454 [2019-10-13 21:08:58,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2019-10-13 21:08:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2448. [2019-10-13 21:08:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2019-10-13 21:08:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3950 transitions. [2019-10-13 21:08:58,161 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3950 transitions. Word has length 169 [2019-10-13 21:08:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:58,162 INFO L462 AbstractCegarLoop]: Abstraction has 2448 states and 3950 transitions. [2019-10-13 21:08:58,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3950 transitions. [2019-10-13 21:08:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:08:58,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:58,167 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:58,168 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1233560272, now seen corresponding path program 1 times [2019-10-13 21:08:58,168 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111463160] [2019-10-13 21:08:58,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:08:58,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111463160] [2019-10-13 21:08:58,392 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:08:58,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:08:58,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414374866] [2019-10-13 21:08:58,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:58,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:58,394 INFO L87 Difference]: Start difference. First operand 2448 states and 3950 transitions. Second operand 4 states. [2019-10-13 21:08:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,494 INFO L93 Difference]: Finished difference Result 7180 states and 11989 transitions. [2019-10-13 21:08:59,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:08:59,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:08:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,536 INFO L225 Difference]: With dead ends: 7180 [2019-10-13 21:08:59,536 INFO L226 Difference]: Without dead ends: 4809 [2019-10-13 21:08:59,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:08:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2019-10-13 21:08:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 4803. [2019-10-13 21:08:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4803 states. [2019-10-13 21:08:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 7883 transitions. [2019-10-13 21:08:59,735 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 7883 transitions. Word has length 170 [2019-10-13 21:08:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,735 INFO L462 AbstractCegarLoop]: Abstraction has 4803 states and 7883 transitions. [2019-10-13 21:08:59,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 7883 transitions. [2019-10-13 21:08:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:08:59,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,741 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:59,741 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1406815489, now seen corresponding path program 1 times [2019-10-13 21:08:59,742 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:59,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881968702] [2019-10-13 21:08:59,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY