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_spec1_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:51,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:51,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:51,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:51,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:51,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:51,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:51,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:51,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:51,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:51,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:51,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:51,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:51,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:51,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:51,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:51,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:51,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:51,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:51,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:51,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:51,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:51,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:51,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:51,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:51,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:51,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:51,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:51,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:51,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:51,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:51,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:51,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:51,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:51,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:51,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:51,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:51,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:51,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:51,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:51,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:51,634 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 21:09:51,647 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:51,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:51,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:51,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:51,649 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:51,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:51,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:51,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:51,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:51,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:51,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:51,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:51,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:51,651 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:51,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:51,651 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:51,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:51,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:51,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:51,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:51,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:51,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:51,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:51,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:51,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:51,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:51,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:51,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:51,654 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 21:09:51,931 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:51,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:51,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:51,961 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:51,961 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:51,962 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product25.cil.c [2019-10-13 21:09:52,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f7e12be/a4928b8033444302a3d179f9fea3a313/FLAG975080def [2019-10-13 21:09:52,670 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:52,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product25.cil.c [2019-10-13 21:09:52,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f7e12be/a4928b8033444302a3d179f9fea3a313/FLAG975080def [2019-10-13 21:09:52,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f7e12be/a4928b8033444302a3d179f9fea3a313 [2019-10-13 21:09:52,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:52,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:52,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:52,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:52,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:52,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:52" (1/1) ... [2019-10-13 21:09:52,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:52, skipping insertion in model container [2019-10-13 21:09:52,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:52" (1/1) ... [2019-10-13 21:09:52,848 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:52,924 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:53,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:53,630 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:53,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:53,889 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:53,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53 WrapperNode [2019-10-13 21:09:53,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:53,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:53,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:53,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:53,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:54,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:54,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:54,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:54,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:54,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:54,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:54,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:54,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (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 21:09:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:54,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:54,203 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:54,203 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:54,203 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:54,204 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:54,204 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:54,204 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:54,204 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:54,206 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:54,206 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:54,206 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:54,206 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:54,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:54,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:54,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:54,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:54,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:54,214 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:54,214 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:54,214 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:54,215 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:54,220 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:54,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:54,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:54,224 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:54,224 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:54,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:54,227 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:54,227 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:54,227 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:54,227 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:54,227 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:56,400 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:56,401 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:56,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:56 BoogieIcfgContainer [2019-10-13 21:09:56,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:56,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:56,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:56,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:56,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:52" (1/3) ... [2019-10-13 21:09:56,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2619fa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:56, skipping insertion in model container [2019-10-13 21:09:56,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (2/3) ... [2019-10-13 21:09:56,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2619fa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:56, skipping insertion in model container [2019-10-13 21:09:56,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:56" (3/3) ... [2019-10-13 21:09:56,413 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2019-10-13 21:09:56,423 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:56,434 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:56,454 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:56,500 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:56,500 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:56,501 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:56,501 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:56,501 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:56,501 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:56,501 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:56,501 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states. [2019-10-13 21:09:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:09:56,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,572 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:56,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 896830833, now seen corresponding path program 1 times [2019-10-13 21:09:56,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:56,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9518323] [2019-10-13 21:09:56,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:57,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9518323] [2019-10-13 21:09:57,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101052487] [2019-10-13 21:09:57,286 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 21:09:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 3204 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:57,981 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:58,228 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:58,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:58,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486835350] [2019-10-13 21:09:58,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:58,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:58,255 INFO L87 Difference]: Start difference. First operand 759 states. Second operand 2 states. [2019-10-13 21:09:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,332 INFO L93 Difference]: Finished difference Result 642 states and 1025 transitions. [2019-10-13 21:09:58,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:58,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-13 21:09:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,362 INFO L225 Difference]: With dead ends: 642 [2019-10-13 21:09:58,362 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:09:58,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:09:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:09:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 970 transitions. [2019-10-13 21:09:58,466 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 970 transitions. Word has length 138 [2019-10-13 21:09:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,469 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 970 transitions. [2019-10-13 21:09:58,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 970 transitions. [2019-10-13 21:09:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:58,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,478 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:58,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,688 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 155958948, now seen corresponding path program 1 times [2019-10-13 21:09:58,689 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107368130] [2019-10-13 21:09:58,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107368130] [2019-10-13 21:09:58,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178258484] [2019-10-13 21:09:58,938 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 21:09:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:59,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,858 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221558253] [2019-10-13 21:09:59,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,862 INFO L87 Difference]: Start difference. First operand 605 states and 970 transitions. Second operand 4 states. [2019-10-13 21:09:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,983 INFO L93 Difference]: Finished difference Result 1182 states and 1913 transitions. [2019-10-13 21:09:59,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:59,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:09:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,991 INFO L225 Difference]: With dead ends: 1182 [2019-10-13 21:09:59,991 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:09:59,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:10:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:10:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:10:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 969 transitions. [2019-10-13 21:10:00,049 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 969 transitions. Word has length 140 [2019-10-13 21:10:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,050 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 969 transitions. [2019-10-13 21:10:00,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 969 transitions. [2019-10-13 21:10:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:10:00,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,064 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:00,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,280 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1824771190, now seen corresponding path program 1 times [2019-10-13 21:10:00,281 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663118061] [2019-10-13 21:10:00,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:00,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663118061] [2019-10-13 21:10:00,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060685619] [2019-10-13 21:10:00,443 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 21:10:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 3209 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:01,103 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:01,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:01,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9691297] [2019-10-13 21:10:01,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:01,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:01,331 INFO L87 Difference]: Start difference. First operand 605 states and 969 transitions. Second operand 4 states. [2019-10-13 21:10:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,420 INFO L93 Difference]: Finished difference Result 1182 states and 1911 transitions. [2019-10-13 21:10:01,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:01,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 21:10:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,428 INFO L225 Difference]: With dead ends: 1182 [2019-10-13 21:10:01,429 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:10:01,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:10:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:10:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:10:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 968 transitions. [2019-10-13 21:10:01,468 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 968 transitions. Word has length 142 [2019-10-13 21:10:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,469 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 968 transitions. [2019-10-13 21:10:01,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 968 transitions. [2019-10-13 21:10:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:10:01,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,475 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:01,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,681 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash 48166316, now seen corresponding path program 1 times [2019-10-13 21:10:01,682 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320579789] [2019-10-13 21:10:01,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:01,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320579789] [2019-10-13 21:10:01,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102280687] [2019-10-13 21:10:01,909 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 21:10:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:02,578 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:02,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398693364] [2019-10-13 21:10:02,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:02,811 INFO L87 Difference]: Start difference. First operand 605 states and 968 transitions. Second operand 4 states. [2019-10-13 21:10:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,900 INFO L93 Difference]: Finished difference Result 1189 states and 1918 transitions. [2019-10-13 21:10:02,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:02,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 21:10:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,906 INFO L225 Difference]: With dead ends: 1189 [2019-10-13 21:10:02,906 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:02,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 980 transitions. [2019-10-13 21:10:02,978 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 980 transitions. Word has length 144 [2019-10-13 21:10:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,979 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 980 transitions. [2019-10-13 21:10:02,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 980 transitions. [2019-10-13 21:10:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:10:02,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,983 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:03,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,188 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1492609617, now seen corresponding path program 1 times [2019-10-13 21:10:03,189 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63101944] [2019-10-13 21:10:03,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:03,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63101944] [2019-10-13 21:10:03,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892531389] [2019-10-13 21:10:03,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:03,949 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:04,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711639562] [2019-10-13 21:10:04,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:04,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:04,207 INFO L87 Difference]: Start difference. First operand 614 states and 980 transitions. Second operand 4 states. [2019-10-13 21:10:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,279 INFO L93 Difference]: Finished difference Result 1191 states and 1919 transitions. [2019-10-13 21:10:04,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:04,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 21:10:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,287 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:10:04,287 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:04,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 979 transitions. [2019-10-13 21:10:04,320 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 979 transitions. Word has length 145 [2019-10-13 21:10:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,320 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 979 transitions. [2019-10-13 21:10:04,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 979 transitions. [2019-10-13 21:10:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:10:04,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,325 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1011781872, now seen corresponding path program 1 times [2019-10-13 21:10:04,534 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314880866] [2019-10-13 21:10:04,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314880866] [2019-10-13 21:10:04,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399327725] [2019-10-13 21:10:04,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 3213 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:05,302 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:05,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667867415] [2019-10-13 21:10:05,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:05,554 INFO L87 Difference]: Start difference. First operand 614 states and 979 transitions. Second operand 4 states. [2019-10-13 21:10:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,656 INFO L93 Difference]: Finished difference Result 1191 states and 1918 transitions. [2019-10-13 21:10:05,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 21:10:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,670 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:10:05,670 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:05,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 978 transitions. [2019-10-13 21:10:05,707 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 978 transitions. Word has length 146 [2019-10-13 21:10:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,710 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 978 transitions. [2019-10-13 21:10:05,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 978 transitions. [2019-10-13 21:10:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:10:05,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,718 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:05,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,929 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2009217747, now seen corresponding path program 1 times [2019-10-13 21:10:05,930 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71408664] [2019-10-13 21:10:05,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:06,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71408664] [2019-10-13 21:10:06,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257326886] [2019-10-13 21:10:06,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:06,871 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:07,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:07,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:07,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902594176] [2019-10-13 21:10:07,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:07,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:07,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:07,143 INFO L87 Difference]: Start difference. First operand 614 states and 978 transitions. Second operand 4 states. [2019-10-13 21:10:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,355 INFO L93 Difference]: Finished difference Result 1190 states and 1918 transitions. [2019-10-13 21:10:07,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:07,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-13 21:10:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,364 INFO L225 Difference]: With dead ends: 1190 [2019-10-13 21:10:07,364 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:07,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 973 transitions. [2019-10-13 21:10:07,405 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 973 transitions. Word has length 147 [2019-10-13 21:10:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,406 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 973 transitions. [2019-10-13 21:10:07,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 973 transitions. [2019-10-13 21:10:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:10:07,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,412 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:07,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,631 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1229116529, now seen corresponding path program 1 times [2019-10-13 21:10:07,631 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930227283] [2019-10-13 21:10:07,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:07,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930227283] [2019-10-13 21:10:07,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622046883] [2019-10-13 21:10:07,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:08,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:08,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:08,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:08,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601581018] [2019-10-13 21:10:08,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:08,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:08,772 INFO L87 Difference]: Start difference. First operand 614 states and 973 transitions. Second operand 4 states. [2019-10-13 21:10:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,949 INFO L93 Difference]: Finished difference Result 1190 states and 1908 transitions. [2019-10-13 21:10:08,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:08,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-13 21:10:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,956 INFO L225 Difference]: With dead ends: 1190 [2019-10-13 21:10:08,957 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:08,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 968 transitions. [2019-10-13 21:10:08,987 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 968 transitions. Word has length 149 [2019-10-13 21:10:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,988 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 968 transitions. [2019-10-13 21:10:08,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 968 transitions. [2019-10-13 21:10:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 21:10:08,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,995 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,207 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash -569391607, now seen corresponding path program 1 times [2019-10-13 21:10:09,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586769492] [2019-10-13 21:10:09,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586769492] [2019-10-13 21:10:09,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078133288] [2019-10-13 21:10:09,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:10,528 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:10,743 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:10,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393859973] [2019-10-13 21:10:10,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:10,745 INFO L87 Difference]: Start difference. First operand 614 states and 968 transitions. Second operand 4 states. [2019-10-13 21:10:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,928 INFO L93 Difference]: Finished difference Result 1226 states and 1957 transitions. [2019-10-13 21:10:10,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-10-13 21:10:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,934 INFO L225 Difference]: With dead ends: 1226 [2019-10-13 21:10:10,935 INFO L226 Difference]: Without dead ends: 653 [2019-10-13 21:10:10,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-13 21:10:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-10-13 21:10:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-10-13 21:10:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1032 transitions. [2019-10-13 21:10:10,964 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1032 transitions. Word has length 151 [2019-10-13 21:10:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,964 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1032 transitions. [2019-10-13 21:10:10,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1032 transitions. [2019-10-13 21:10:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:10,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,969 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:11,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,178 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 562048214, now seen corresponding path program 1 times [2019-10-13 21:10:11,179 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:11,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043170504] [2019-10-13 21:10:11,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:11,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043170504] [2019-10-13 21:10:11,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390912118] [2019-10-13 21:10:11,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 3219 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:12,162 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:12,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:12,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:12,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240421765] [2019-10-13 21:10:12,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:12,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:12,371 INFO L87 Difference]: Start difference. First operand 653 states and 1032 transitions. Second operand 4 states. [2019-10-13 21:10:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,553 INFO L93 Difference]: Finished difference Result 1229 states and 1960 transitions. [2019-10-13 21:10:12,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:12,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:10:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,560 INFO L225 Difference]: With dead ends: 1229 [2019-10-13 21:10:12,560 INFO L226 Difference]: Without dead ends: 653 [2019-10-13 21:10:12,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-13 21:10:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-10-13 21:10:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-10-13 21:10:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1027 transitions. [2019-10-13 21:10:12,586 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1027 transitions. Word has length 152 [2019-10-13 21:10:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,586 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1027 transitions. [2019-10-13 21:10:12,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1027 transitions. [2019-10-13 21:10:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:12,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,592 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,802 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1838952981, now seen corresponding path program 1 times [2019-10-13 21:10:12,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004660226] [2019-10-13 21:10:12,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:12,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004660226] [2019-10-13 21:10:12,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576496905] [2019-10-13 21:10:12,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:13,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:14,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:14,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:14,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:14,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737707618] [2019-10-13 21:10:14,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:14,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:14,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:14,556 INFO L87 Difference]: Start difference. First operand 653 states and 1027 transitions. Second operand 9 states. [2019-10-13 21:10:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,813 INFO L93 Difference]: Finished difference Result 1242 states and 1974 transitions. [2019-10-13 21:10:14,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:14,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-13 21:10:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,819 INFO L225 Difference]: With dead ends: 1242 [2019-10-13 21:10:14,819 INFO L226 Difference]: Without dead ends: 669 [2019-10-13 21:10:14,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-10-13 21:10:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 662. [2019-10-13 21:10:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-13 21:10:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1040 transitions. [2019-10-13 21:10:14,857 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1040 transitions. Word has length 152 [2019-10-13 21:10:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,857 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1040 transitions. [2019-10-13 21:10:14,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1040 transitions. [2019-10-13 21:10:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:14,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,862 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:15,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,070 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash -474852236, now seen corresponding path program 1 times [2019-10-13 21:10:15,072 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:15,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724803844] [2019-10-13 21:10:15,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:15,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724803844] [2019-10-13 21:10:15,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682833088] [2019-10-13 21:10:15,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:15,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:16,320 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:16,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:16,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444167654] [2019-10-13 21:10:16,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:16,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:16,322 INFO L87 Difference]: Start difference. First operand 662 states and 1040 transitions. Second operand 11 states. [2019-10-13 21:10:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,503 INFO L93 Difference]: Finished difference Result 1180 states and 1876 transitions. [2019-10-13 21:10:16,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:16,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-13 21:10:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,509 INFO L225 Difference]: With dead ends: 1180 [2019-10-13 21:10:16,509 INFO L226 Difference]: Without dead ends: 679 [2019-10-13 21:10:16,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-13 21:10:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 669. [2019-10-13 21:10:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-13 21:10:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1050 transitions. [2019-10-13 21:10:16,544 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1050 transitions. Word has length 152 [2019-10-13 21:10:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,544 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1050 transitions. [2019-10-13 21:10:16,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1050 transitions. [2019-10-13 21:10:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:16,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,549 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:16,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,758 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 880081424, now seen corresponding path program 1 times [2019-10-13 21:10:16,759 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107427592] [2019-10-13 21:10:16,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:16,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107427592] [2019-10-13 21:10:16,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193480745] [2019-10-13 21:10:16,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:17,811 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:18,110 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:18,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:18,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892019406] [2019-10-13 21:10:18,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:18,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:18,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:18,112 INFO L87 Difference]: Start difference. First operand 669 states and 1050 transitions. Second operand 8 states. [2019-10-13 21:10:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:18,230 INFO L93 Difference]: Finished difference Result 1184 states and 1885 transitions. [2019-10-13 21:10:18,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:18,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2019-10-13 21:10:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:18,235 INFO L225 Difference]: With dead ends: 1184 [2019-10-13 21:10:18,235 INFO L226 Difference]: Without dead ends: 683 [2019-10-13 21:10:18,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-10-13 21:10:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 676. [2019-10-13 21:10:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-13 21:10:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1061 transitions. [2019-10-13 21:10:18,275 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1061 transitions. Word has length 153 [2019-10-13 21:10:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:18,275 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1061 transitions. [2019-10-13 21:10:18,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1061 transitions. [2019-10-13 21:10:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:18,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:18,282 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:18,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,492 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1186583152, now seen corresponding path program 1 times [2019-10-13 21:10:18,493 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:18,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253591500] [2019-10-13 21:10:18,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:18,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253591500] [2019-10-13 21:10:18,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926780963] [2019-10-13 21:10:18,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:19,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:19,432 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:19,931 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:19,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:19,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798461030] [2019-10-13 21:10:19,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:19,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:19,934 INFO L87 Difference]: Start difference. First operand 676 states and 1061 transitions. Second operand 14 states. [2019-10-13 21:10:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:20,199 INFO L93 Difference]: Finished difference Result 1185 states and 1885 transitions. [2019-10-13 21:10:20,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:20,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-10-13 21:10:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:20,204 INFO L225 Difference]: With dead ends: 1185 [2019-10-13 21:10:20,204 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:10:20,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:10:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 676. [2019-10-13 21:10:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-13 21:10:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1061 transitions. [2019-10-13 21:10:20,249 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1061 transitions. Word has length 153 [2019-10-13 21:10:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:20,250 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1061 transitions. [2019-10-13 21:10:20,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1061 transitions. [2019-10-13 21:10:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:10:20,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:20,257 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:20,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,467 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash -951095725, now seen corresponding path program 1 times [2019-10-13 21:10:20,468 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:20,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431129555] [2019-10-13 21:10:20,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:20,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431129555] [2019-10-13 21:10:20,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064006027] [2019-10-13 21:10:20,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:21,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:21,455 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:21,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:21,915 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:21,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:21,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314452441] [2019-10-13 21:10:21,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:21,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:21,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:21,917 INFO L87 Difference]: Start difference. First operand 676 states and 1061 transitions. Second operand 11 states. [2019-10-13 21:10:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:22,178 INFO L93 Difference]: Finished difference Result 1186 states and 1893 transitions. [2019-10-13 21:10:22,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:22,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-13 21:10:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:22,182 INFO L225 Difference]: With dead ends: 1186 [2019-10-13 21:10:22,183 INFO L226 Difference]: Without dead ends: 685 [2019-10-13 21:10:22,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-13 21:10:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 678. [2019-10-13 21:10:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-13 21:10:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1067 transitions. [2019-10-13 21:10:22,210 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1067 transitions. Word has length 154 [2019-10-13 21:10:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:22,210 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1067 transitions. [2019-10-13 21:10:22,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1067 transitions. [2019-10-13 21:10:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:10:22,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:22,215 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:22,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,425 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2003553333, now seen corresponding path program 1 times [2019-10-13 21:10:22,426 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:22,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776704588] [2019-10-13 21:10:22,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:22,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776704588] [2019-10-13 21:10:22,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017496662] [2019-10-13 21:10:22,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 3213 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:23,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:23,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:23,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:23,650 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:23,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:23,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235629574] [2019-10-13 21:10:23,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:23,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:23,652 INFO L87 Difference]: Start difference. First operand 678 states and 1067 transitions. Second operand 9 states. [2019-10-13 21:10:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,774 INFO L93 Difference]: Finished difference Result 1282 states and 2058 transitions. [2019-10-13 21:10:23,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:23,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-13 21:10:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,779 INFO L225 Difference]: With dead ends: 1282 [2019-10-13 21:10:23,779 INFO L226 Difference]: Without dead ends: 687 [2019-10-13 21:10:23,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-13 21:10:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 685. [2019-10-13 21:10:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-13 21:10:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1075 transitions. [2019-10-13 21:10:23,809 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1075 transitions. Word has length 155 [2019-10-13 21:10:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,809 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1075 transitions. [2019-10-13 21:10:23,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1075 transitions. [2019-10-13 21:10:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:10:23,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,814 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:24,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,029 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1385689816, now seen corresponding path program 1 times [2019-10-13 21:10:24,030 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498339581] [2019-10-13 21:10:24,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:24,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498339581] [2019-10-13 21:10:24,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107225031] [2019-10-13 21:10:24,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:24,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:24,903 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:25,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:25,216 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:25,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:25,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668704811] [2019-10-13 21:10:25,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:25,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:25,218 INFO L87 Difference]: Start difference. First operand 685 states and 1075 transitions. Second operand 8 states. [2019-10-13 21:10:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:25,349 INFO L93 Difference]: Finished difference Result 1296 states and 2069 transitions. [2019-10-13 21:10:25,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:25,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 156 [2019-10-13 21:10:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:25,353 INFO L225 Difference]: With dead ends: 1296 [2019-10-13 21:10:25,353 INFO L226 Difference]: Without dead ends: 694 [2019-10-13 21:10:25,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-13 21:10:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 689. [2019-10-13 21:10:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2019-10-13 21:10:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1081 transitions. [2019-10-13 21:10:25,379 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1081 transitions. Word has length 156 [2019-10-13 21:10:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:25,380 INFO L462 AbstractCegarLoop]: Abstraction has 689 states and 1081 transitions. [2019-10-13 21:10:25,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1081 transitions. [2019-10-13 21:10:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:10:25,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:25,384 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:25,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,593 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2127627972, now seen corresponding path program 1 times [2019-10-13 21:10:25,593 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:25,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93395532] [2019-10-13 21:10:25,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:25,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93395532] [2019-10-13 21:10:25,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569675422] [2019-10-13 21:10:25,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:10:26,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:26,691 INFO L321 TraceCheckSpWp]: Computing backward predicates...