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_spec3_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:12:05,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:12:05,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:12:05,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:12:05,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:12:05,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:12:05,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:12:05,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:12:05,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:12:05,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:12:05,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:12:05,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:12:05,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:12:05,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:12:05,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:12:05,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:12:05,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:12:05,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:12:05,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:12:05,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:12:05,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:12:05,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:12:05,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:12:05,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:12:05,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:12:05,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:12:05,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:12:05,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:12:05,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:12:05,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:12:05,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:12:05,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:12:05,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:12:05,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:12:05,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:12:05,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:12:05,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:12:05,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:12:05,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:12:05,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:12:05,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:12:05,649 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 21:12:05,663 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:12:05,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:12:05,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:12:05,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:12:05,665 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:12:05,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:12:05,666 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:12:05,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:12:05,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:12:05,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:12:05,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:12:05,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:12:05,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:12:05,667 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:12:05,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:12:05,667 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:12:05,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:12:05,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:12:05,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:12:05,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:12:05,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:12:05,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:12:05,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:12:05,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:12:05,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:12:05,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:12:05,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:12:05,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:12:05,670 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 21:12:05,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:12:05,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:12:05,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:12:05,971 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:12:05,971 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:12:05,972 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product31.cil.c [2019-10-13 21:12:06,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff45572c/96b8a993a5614ca1afa7a0a044b76890/FLAG21b8f9b76 [2019-10-13 21:12:06,642 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:12:06,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product31.cil.c [2019-10-13 21:12:06,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff45572c/96b8a993a5614ca1afa7a0a044b76890/FLAG21b8f9b76 [2019-10-13 21:12:06,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff45572c/96b8a993a5614ca1afa7a0a044b76890 [2019-10-13 21:12:06,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:12:06,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:12:06,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:12:06,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:12:06,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:12:06,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:12:06" (1/1) ... [2019-10-13 21:12:06,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c381ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:06, skipping insertion in model container [2019-10-13 21:12:06,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:12:06" (1/1) ... [2019-10-13 21:12:06,916 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:12:07,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:12:07,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:12:07,682 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:12:07,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:12:07,963 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:12:07,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07 WrapperNode [2019-10-13 21:12:07,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:12:07,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:12:07,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:12:07,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:12:07,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:07,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (1/1) ... [2019-10-13 21:12:08,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:12:08,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:12:08,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:12:08,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:12:08,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (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 21:12:08,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:12:08,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:12:08,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:12:08,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:12:08,386 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:12:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:12:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:12:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:12:08,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:12:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:12:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:12:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:12:08,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:12:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:12:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:12:08,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:12:08,394 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:12:08,395 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:12:08,395 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:12:08,395 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:12:08,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:12:08,396 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:12:08,396 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:12:08,397 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:12:08,397 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:12:08,398 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:12:08,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:12:08,398 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:12:08,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:12:08,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:12:08,400 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:12:08,400 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:12:08,400 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:12:08,400 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:12:08,401 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:12:08,401 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:12:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:12:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:12:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:12:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:12:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:12:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:12:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:12:08,404 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:12:08,404 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:12:08,404 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:12:08,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:12:08,405 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:12:08,405 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:12:08,405 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:12:08,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:12:08,406 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:12:08,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:12:08,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:12:08,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:12:08,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:12:08,407 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:12:08,408 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:12:08,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:12:08,408 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:12:08,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:12:08,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:12:08,410 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:12:08,410 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:12:08,410 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:12:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:12:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:12:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:12:08,412 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:12:08,412 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:12:08,412 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:12:08,412 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:12:08,413 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:12:08,414 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:12:08,414 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:12:08,414 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:12:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:12:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:12:08,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:12:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:12:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:12:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:12:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:12:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:12:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:12:08,419 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:12:08,419 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:12:08,420 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:12:08,421 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:12:08,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:12:08,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:12:08,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:12:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:12:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:12:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:12:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:12:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:12:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:12:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:12:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:12:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:12:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:12:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:12:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:12:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:12:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:12:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:12:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:12:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:12:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:12:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:12:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:12:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:12:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:12:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:12:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:12:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:12:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:12:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:12:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:12:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:12:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:12:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:12:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:12:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:12:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:12:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:12:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:12:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:12:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:12:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:12:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:12:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:12:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:12:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:12:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:12:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:12:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:12:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:12:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:12:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:12:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:12:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:12:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:12:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:12:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:12:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:12:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:12:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:12:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:12:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:12:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:12:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:12:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:12:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:12:11,169 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:12:11,170 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:12:11,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:12:11 BoogieIcfgContainer [2019-10-13 21:12:11,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:12:11,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:12:11,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:12:11,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:12:11,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:12:06" (1/3) ... [2019-10-13 21:12:11,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3860a366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:12:11, skipping insertion in model container [2019-10-13 21:12:11,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:12:07" (2/3) ... [2019-10-13 21:12:11,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3860a366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:12:11, skipping insertion in model container [2019-10-13 21:12:11,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:12:11" (3/3) ... [2019-10-13 21:12:11,180 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2019-10-13 21:12:11,191 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:12:11,203 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:12:11,216 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:12:11,264 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:12:11,264 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:12:11,265 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:12:11,265 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:12:11,265 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:12:11,265 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:12:11,265 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:12:11,265 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:12:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states. [2019-10-13 21:12:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 21:12:11,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:11,346 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:12:11,351 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash -734738765, now seen corresponding path program 1 times [2019-10-13 21:12:11,370 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:11,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986819966] [2019-10-13 21:12:11,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:11,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:11,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:12,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986819966] [2019-10-13 21:12:12,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:12,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:12,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217499226] [2019-10-13 21:12:12,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:12,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:12,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:12,186 INFO L87 Difference]: Start difference. First operand 837 states. Second operand 7 states. [2019-10-13 21:12:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:12,493 INFO L93 Difference]: Finished difference Result 1353 states and 2166 transitions. [2019-10-13 21:12:12,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:12:12,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-13 21:12:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:12,522 INFO L225 Difference]: With dead ends: 1353 [2019-10-13 21:12:12,522 INFO L226 Difference]: Without dead ends: 685 [2019-10-13 21:12:12,533 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 21:12:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-13 21:12:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2019-10-13 21:12:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:12:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1078 transitions. [2019-10-13 21:12:12,684 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1078 transitions. Word has length 141 [2019-10-13 21:12:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:12,687 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1078 transitions. [2019-10-13 21:12:12,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1078 transitions. [2019-10-13 21:12:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:12:12,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:12,697 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:12:12,698 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash -843585886, now seen corresponding path program 1 times [2019-10-13 21:12:12,699 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:12,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808880166] [2019-10-13 21:12:12,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:12,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:12,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:12,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808880166] [2019-10-13 21:12:12,986 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:12,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:12:12,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264715733] [2019-10-13 21:12:12,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:12:12,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:12:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:12:12,992 INFO L87 Difference]: Start difference. First operand 683 states and 1078 transitions. Second operand 4 states. [2019-10-13 21:12:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:13,074 INFO L93 Difference]: Finished difference Result 1332 states and 2121 transitions. [2019-10-13 21:12:13,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:12:13,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 21:12:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:13,083 INFO L225 Difference]: With dead ends: 1332 [2019-10-13 21:12:13,083 INFO L226 Difference]: Without dead ends: 665 [2019-10-13 21:12:13,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:12:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-10-13 21:12:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2019-10-13 21:12:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-10-13 21:12:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1045 transitions. [2019-10-13 21:12:13,142 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1045 transitions. Word has length 142 [2019-10-13 21:12:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:13,146 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 1045 transitions. [2019-10-13 21:12:13,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:12:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1045 transitions. [2019-10-13 21:12:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:12:13,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:13,155 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:12:13,155 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash -71062830, now seen corresponding path program 1 times [2019-10-13 21:12:13,156 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:13,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085490646] [2019-10-13 21:12:13,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:13,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:13,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:13,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085490646] [2019-10-13 21:12:13,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:13,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:13,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880251422] [2019-10-13 21:12:13,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:13,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:13,437 INFO L87 Difference]: Start difference. First operand 665 states and 1045 transitions. Second operand 7 states. [2019-10-13 21:12:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:13,580 INFO L93 Difference]: Finished difference Result 1301 states and 2063 transitions. [2019-10-13 21:12:13,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:12:13,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-13 21:12:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:13,589 INFO L225 Difference]: With dead ends: 1301 [2019-10-13 21:12:13,589 INFO L226 Difference]: Without dead ends: 659 [2019-10-13 21:12:13,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 21:12:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-10-13 21:12:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2019-10-13 21:12:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2019-10-13 21:12:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1032 transitions. [2019-10-13 21:12:13,628 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1032 transitions. Word has length 142 [2019-10-13 21:12:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:13,629 INFO L462 AbstractCegarLoop]: Abstraction has 659 states and 1032 transitions. [2019-10-13 21:12:13,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1032 transitions. [2019-10-13 21:12:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:12:13,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:13,635 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:13,635 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash 406921655, now seen corresponding path program 1 times [2019-10-13 21:12:13,636 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:13,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666900768] [2019-10-13 21:12:13,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:13,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:13,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:13,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666900768] [2019-10-13 21:12:13,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:13,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:13,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006895539] [2019-10-13 21:12:13,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:13,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:13,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:13,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:13,950 INFO L87 Difference]: Start difference. First operand 659 states and 1032 transitions. Second operand 7 states. [2019-10-13 21:12:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:14,051 INFO L93 Difference]: Finished difference Result 1289 states and 2037 transitions. [2019-10-13 21:12:14,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:12:14,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-13 21:12:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:14,058 INFO L225 Difference]: With dead ends: 1289 [2019-10-13 21:12:14,058 INFO L226 Difference]: Without dead ends: 653 [2019-10-13 21:12:14,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 21:12:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-13 21:12:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-10-13 21:12:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-10-13 21:12:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1019 transitions. [2019-10-13 21:12:14,089 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1019 transitions. Word has length 143 [2019-10-13 21:12:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:14,090 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1019 transitions. [2019-10-13 21:12:14,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1019 transitions. [2019-10-13 21:12:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:12:14,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:14,095 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:12:14,096 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -576561514, now seen corresponding path program 1 times [2019-10-13 21:12:14,096 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:14,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666316513] [2019-10-13 21:12:14,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:14,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666316513] [2019-10-13 21:12:14,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:14,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:14,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903691243] [2019-10-13 21:12:14,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:14,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:14,254 INFO L87 Difference]: Start difference. First operand 653 states and 1019 transitions. Second operand 7 states. [2019-10-13 21:12:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:14,352 INFO L93 Difference]: Finished difference Result 1277 states and 2011 transitions. [2019-10-13 21:12:14,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:12:14,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-10-13 21:12:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:14,369 INFO L225 Difference]: With dead ends: 1277 [2019-10-13 21:12:14,369 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:14,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 21:12:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1006 transitions. [2019-10-13 21:12:14,409 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1006 transitions. Word has length 144 [2019-10-13 21:12:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:14,409 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1006 transitions. [2019-10-13 21:12:14,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1006 transitions. [2019-10-13 21:12:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:12:14,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:14,420 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:12:14,420 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1815508329, now seen corresponding path program 1 times [2019-10-13 21:12:14,422 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:14,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811134056] [2019-10-13 21:12:14,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811134056] [2019-10-13 21:12:14,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:14,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:14,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111174341] [2019-10-13 21:12:14,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:14,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:14,693 INFO L87 Difference]: Start difference. First operand 647 states and 1006 transitions. Second operand 7 states. [2019-10-13 21:12:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:14,796 INFO L93 Difference]: Finished difference Result 1265 states and 1985 transitions. [2019-10-13 21:12:14,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:12:14,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-10-13 21:12:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:14,804 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 21:12:14,804 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:14,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 21:12:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1005 transitions. [2019-10-13 21:12:14,841 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1005 transitions. Word has length 144 [2019-10-13 21:12:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:14,841 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1005 transitions. [2019-10-13 21:12:14,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1005 transitions. [2019-10-13 21:12:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:12:14,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:14,849 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:14,849 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash 379098299, now seen corresponding path program 1 times [2019-10-13 21:12:14,850 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:14,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929179447] [2019-10-13 21:12:14,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:14,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:15,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929179447] [2019-10-13 21:12:15,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:15,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:12:15,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231233505] [2019-10-13 21:12:15,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:12:15,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:12:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:12:15,044 INFO L87 Difference]: Start difference. First operand 647 states and 1005 transitions. Second operand 5 states. [2019-10-13 21:12:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:15,151 INFO L93 Difference]: Finished difference Result 1264 states and 1982 transitions. [2019-10-13 21:12:15,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:15,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-13 21:12:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:15,160 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:12:15,160 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:15,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:12:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1004 transitions. [2019-10-13 21:12:15,205 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1004 transitions. Word has length 145 [2019-10-13 21:12:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:15,205 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1004 transitions. [2019-10-13 21:12:15,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:12:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1004 transitions. [2019-10-13 21:12:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:12:15,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:15,213 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:15,214 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1077265188, now seen corresponding path program 1 times [2019-10-13 21:12:15,215 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:15,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427624895] [2019-10-13 21:12:15,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:15,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427624895] [2019-10-13 21:12:15,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:15,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:12:15,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186889152] [2019-10-13 21:12:15,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:12:15,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:12:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:12:15,472 INFO L87 Difference]: Start difference. First operand 647 states and 1004 transitions. Second operand 5 states. [2019-10-13 21:12:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:15,555 INFO L93 Difference]: Finished difference Result 1264 states and 1980 transitions. [2019-10-13 21:12:15,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:15,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-10-13 21:12:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:15,563 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:12:15,563 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:15,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:12:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1003 transitions. [2019-10-13 21:12:15,595 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1003 transitions. Word has length 146 [2019-10-13 21:12:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:15,599 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1003 transitions. [2019-10-13 21:12:15,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:12:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1003 transitions. [2019-10-13 21:12:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:12:15,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:15,605 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:12:15,605 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1621721034, now seen corresponding path program 1 times [2019-10-13 21:12:15,606 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:15,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894057637] [2019-10-13 21:12:15,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:15,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894057637] [2019-10-13 21:12:15,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:15,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:12:15,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688684828] [2019-10-13 21:12:15,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:12:15,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:12:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:12:15,766 INFO L87 Difference]: Start difference. First operand 647 states and 1003 transitions. Second operand 5 states. [2019-10-13 21:12:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:15,845 INFO L93 Difference]: Finished difference Result 1264 states and 1978 transitions. [2019-10-13 21:12:15,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:15,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-13 21:12:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:15,852 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:12:15,852 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:15,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:12:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1002 transitions. [2019-10-13 21:12:15,888 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1002 transitions. Word has length 147 [2019-10-13 21:12:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:15,888 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1002 transitions. [2019-10-13 21:12:15,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:12:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1002 transitions. [2019-10-13 21:12:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 21:12:15,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:15,895 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:15,895 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash 333156215, now seen corresponding path program 1 times [2019-10-13 21:12:15,896 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:15,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829818892] [2019-10-13 21:12:15,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:15,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:16,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829818892] [2019-10-13 21:12:16,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:16,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:12:16,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317973131] [2019-10-13 21:12:16,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:12:16,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:12:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:12:16,039 INFO L87 Difference]: Start difference. First operand 647 states and 1002 transitions. Second operand 5 states. [2019-10-13 21:12:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:16,107 INFO L93 Difference]: Finished difference Result 1264 states and 1976 transitions. [2019-10-13 21:12:16,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:16,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-13 21:12:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:16,116 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:12:16,116 INFO L226 Difference]: Without dead ends: 647 [2019-10-13 21:12:16,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:12:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-10-13 21:12:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-10-13 21:12:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-13 21:12:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1001 transitions. [2019-10-13 21:12:16,154 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1001 transitions. Word has length 148 [2019-10-13 21:12:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:16,155 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1001 transitions. [2019-10-13 21:12:16,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:12:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1001 transitions. [2019-10-13 21:12:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:12:16,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:16,159 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:12:16,160 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1837019215, now seen corresponding path program 1 times [2019-10-13 21:12:16,160 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:16,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748210584] [2019-10-13 21:12:16,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:16,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:16,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:12:16,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748210584] [2019-10-13 21:12:16,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680740073] [2019-10-13 21:12:16,460 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 21:12:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:17,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 3067 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:12:17,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:12:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:12:17,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:12:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:17,355 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:12:17,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:12:17,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685547298] [2019-10-13 21:12:17,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:12:17,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:12:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:12:17,358 INFO L87 Difference]: Start difference. First operand 647 states and 1001 transitions. Second operand 3 states. [2019-10-13 21:12:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:17,458 INFO L93 Difference]: Finished difference Result 1820 states and 2863 transitions. [2019-10-13 21:12:17,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:12:17,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-13 21:12:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:17,470 INFO L225 Difference]: With dead ends: 1820 [2019-10-13 21:12:17,470 INFO L226 Difference]: Without dead ends: 1207 [2019-10-13 21:12:17,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:12:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-10-13 21:12:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1194. [2019-10-13 21:12:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2019-10-13 21:12:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1865 transitions. [2019-10-13 21:12:17,583 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1865 transitions. Word has length 149 [2019-10-13 21:12:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:17,587 INFO L462 AbstractCegarLoop]: Abstraction has 1194 states and 1865 transitions. [2019-10-13 21:12:17,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:12:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1865 transitions. [2019-10-13 21:12:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:12:17,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:17,594 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:17,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:17,804 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1672242044, now seen corresponding path program 1 times [2019-10-13 21:12:17,805 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:17,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817547232] [2019-10-13 21:12:17,805 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:17,805 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:17,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:18,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817547232] [2019-10-13 21:12:18,014 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:18,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:18,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109271444] [2019-10-13 21:12:18,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:18,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:18,018 INFO L87 Difference]: Start difference. First operand 1194 states and 1865 transitions. Second operand 7 states. [2019-10-13 21:12:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:21,438 INFO L93 Difference]: Finished difference Result 3508 states and 5628 transitions. [2019-10-13 21:12:21,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:12:21,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-10-13 21:12:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:21,461 INFO L225 Difference]: With dead ends: 3508 [2019-10-13 21:12:21,462 INFO L226 Difference]: Without dead ends: 2348 [2019-10-13 21:12:21,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:12:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-13 21:12:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2282. [2019-10-13 21:12:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2019-10-13 21:12:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3635 transitions. [2019-10-13 21:12:21,596 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3635 transitions. Word has length 153 [2019-10-13 21:12:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:21,596 INFO L462 AbstractCegarLoop]: Abstraction has 2282 states and 3635 transitions. [2019-10-13 21:12:21,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3635 transitions. [2019-10-13 21:12:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:12:21,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:21,602 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:12:21,603 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 357872937, now seen corresponding path program 1 times [2019-10-13 21:12:21,603 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:21,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570833982] [2019-10-13 21:12:21,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:21,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:21,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:12:21,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570833982] [2019-10-13 21:12:21,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935009992] [2019-10-13 21:12:21,856 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 21:12:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:22,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:12:22,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:12:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:12:22,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:12:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:22,687 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:12:22,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:12:22,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900132900] [2019-10-13 21:12:22,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:12:22,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:22,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:12:22,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:12:22,690 INFO L87 Difference]: Start difference. First operand 2282 states and 3635 transitions. Second operand 3 states. [2019-10-13 21:12:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:22,856 INFO L93 Difference]: Finished difference Result 5632 states and 9054 transitions. [2019-10-13 21:12:22,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:12:22,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-13 21:12:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:22,889 INFO L225 Difference]: With dead ends: 5632 [2019-10-13 21:12:22,889 INFO L226 Difference]: Without dead ends: 3384 [2019-10-13 21:12:22,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:12:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2019-10-13 21:12:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3284. [2019-10-13 21:12:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3284 states. [2019-10-13 21:12:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5247 transitions. [2019-10-13 21:12:23,101 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5247 transitions. Word has length 150 [2019-10-13 21:12:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:23,104 INFO L462 AbstractCegarLoop]: Abstraction has 3284 states and 5247 transitions. [2019-10-13 21:12:23,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:12:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5247 transitions. [2019-10-13 21:12:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:12:23,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:23,113 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:23,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:23,322 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1845400304, now seen corresponding path program 1 times [2019-10-13 21:12:23,323 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:23,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175441281] [2019-10-13 21:12:23,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:23,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:23,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:12:23,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175441281] [2019-10-13 21:12:23,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970037743] [2019-10-13 21:12:23,555 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 21:12:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:24,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:12:24,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:12:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:12:24,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:12:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:24,327 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:12:24,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 11 [2019-10-13 21:12:24,327 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269435621] [2019-10-13 21:12:24,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:12:24,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:12:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:12:24,329 INFO L87 Difference]: Start difference. First operand 3284 states and 5247 transitions. Second operand 3 states. [2019-10-13 21:12:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:24,595 INFO L93 Difference]: Finished difference Result 9752 states and 15759 transitions. [2019-10-13 21:12:24,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:12:24,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-10-13 21:12:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:24,650 INFO L225 Difference]: With dead ends: 9752 [2019-10-13 21:12:24,650 INFO L226 Difference]: Without dead ends: 6503 [2019-10-13 21:12:24,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:12:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6503 states. [2019-10-13 21:12:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6503 to 6433. [2019-10-13 21:12:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6433 states. [2019-10-13 21:12:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 10358 transitions. [2019-10-13 21:12:25,002 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 10358 transitions. Word has length 153 [2019-10-13 21:12:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:25,003 INFO L462 AbstractCegarLoop]: Abstraction has 6433 states and 10358 transitions. [2019-10-13 21:12:25,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:12:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 10358 transitions. [2019-10-13 21:12:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:12:25,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:25,013 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:25,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:25,233 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1169703314, now seen corresponding path program 1 times [2019-10-13 21:12:25,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:25,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722494033] [2019-10-13 21:12:25,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:25,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:25,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:12:25,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722494033] [2019-10-13 21:12:25,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635403740] [2019-10-13 21:12:25,422 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 21:12:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:26,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 21:12:26,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:12:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:12:26,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:12:26,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:12:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:12:27,082 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:12:27,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-10-13 21:12:27,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894584083] [2019-10-13 21:12:27,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:12:27,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:12:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:12:27,085 INFO L87 Difference]: Start difference. First operand 6433 states and 10358 transitions. Second operand 6 states. [2019-10-13 21:12:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:28,952 INFO L93 Difference]: Finished difference Result 17372 states and 28310 transitions. [2019-10-13 21:12:28,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:12:28,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-13 21:12:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:29,039 INFO L225 Difference]: With dead ends: 17372 [2019-10-13 21:12:29,039 INFO L226 Difference]: Without dead ends: 10973 [2019-10-13 21:12:29,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:12:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10973 states. [2019-10-13 21:12:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 10927. [2019-10-13 21:12:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10927 states. [2019-10-13 21:12:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10927 states to 10927 states and 17270 transitions. [2019-10-13 21:12:29,672 INFO L78 Accepts]: Start accepts. Automaton has 10927 states and 17270 transitions. Word has length 153 [2019-10-13 21:12:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:29,673 INFO L462 AbstractCegarLoop]: Abstraction has 10927 states and 17270 transitions. [2019-10-13 21:12:29,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:12:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10927 states and 17270 transitions. [2019-10-13 21:12:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:12:29,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:29,682 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:29,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:29,903 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash 672411, now seen corresponding path program 1 times [2019-10-13 21:12:29,904 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:29,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439035889] [2019-10-13 21:12:29,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:29,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:29,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:12:30,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439035889] [2019-10-13 21:12:30,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:30,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:12:30,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130777944] [2019-10-13 21:12:30,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:12:30,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:12:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:12:30,087 INFO L87 Difference]: Start difference. First operand 10927 states and 17270 transitions. Second operand 4 states. [2019-10-13 21:12:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:30,485 INFO L93 Difference]: Finished difference Result 21816 states and 34789 transitions. [2019-10-13 21:12:30,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:30,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-13 21:12:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:30,562 INFO L225 Difference]: With dead ends: 21816 [2019-10-13 21:12:30,562 INFO L226 Difference]: Without dead ends: 10923 [2019-10-13 21:12:30,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:12:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2019-10-13 21:12:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 10891. [2019-10-13 21:12:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10891 states. [2019-10-13 21:12:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10891 states to 10891 states and 17148 transitions. [2019-10-13 21:12:31,028 INFO L78 Accepts]: Start accepts. Automaton has 10891 states and 17148 transitions. Word has length 153 [2019-10-13 21:12:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:31,029 INFO L462 AbstractCegarLoop]: Abstraction has 10891 states and 17148 transitions. [2019-10-13 21:12:31,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:12:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10891 states and 17148 transitions. [2019-10-13 21:12:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:12:31,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:31,039 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:31,039 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498317, now seen corresponding path program 1 times [2019-10-13 21:12:31,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:31,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636915868] [2019-10-13 21:12:31,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:31,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:31,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 21:12:31,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636915868] [2019-10-13 21:12:31,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:31,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:12:31,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186295142] [2019-10-13 21:12:31,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:12:31,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:12:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:12:31,348 INFO L87 Difference]: Start difference. First operand 10891 states and 17148 transitions. Second operand 7 states. [2019-10-13 21:12:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:34,621 INFO L93 Difference]: Finished difference Result 32622 states and 52714 transitions. [2019-10-13 21:12:34,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:12:34,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-10-13 21:12:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:34,764 INFO L225 Difference]: With dead ends: 32622 [2019-10-13 21:12:34,765 INFO L226 Difference]: Without dead ends: 21765 [2019-10-13 21:12:34,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:12:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21765 states. [2019-10-13 21:12:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21765 to 21585. [2019-10-13 21:12:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21585 states. [2019-10-13 21:12:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21585 states to 21585 states and 34375 transitions. [2019-10-13 21:12:35,683 INFO L78 Accepts]: Start accepts. Automaton has 21585 states and 34375 transitions. Word has length 161 [2019-10-13 21:12:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:35,684 INFO L462 AbstractCegarLoop]: Abstraction has 21585 states and 34375 transitions. [2019-10-13 21:12:35,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:12:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 21585 states and 34375 transitions. [2019-10-13 21:12:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:12:35,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:35,691 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 21:12:35,691 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1208852276, now seen corresponding path program 1 times [2019-10-13 21:12:35,692 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:35,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581059776] [2019-10-13 21:12:35,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:35,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:35,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:12:35,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581059776] [2019-10-13 21:12:35,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:12:35,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:12:35,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025572206] [2019-10-13 21:12:35,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:12:35,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:12:35,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:12:35,827 INFO L87 Difference]: Start difference. First operand 21585 states and 34375 transitions. Second operand 4 states. [2019-10-13 21:12:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:37,500 INFO L93 Difference]: Finished difference Result 43224 states and 69471 transitions. [2019-10-13 21:12:37,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:12:37,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 21:12:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:37,665 INFO L225 Difference]: With dead ends: 43224 [2019-10-13 21:12:37,665 INFO L226 Difference]: Without dead ends: 21667 [2019-10-13 21:12:37,744 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 21:12:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21667 states.