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 -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:19:56,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:19:56,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:19:56,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:19:56,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:19:56,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:19:56,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:19:56,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:19:56,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:19:56,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:19:56,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:19:56,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:19:56,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:19:56,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:19:56,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:19:56,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:19:56,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:19:56,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:19:56,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:19:56,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:19:56,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:19:56,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:19:56,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:19:56,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:19:56,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:19:56,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:19:56,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:19:56,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:19:56,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:19:56,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:19:56,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:19:56,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:19:56,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:19:56,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:19:56,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:19:56,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:19:56,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:19:56,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:19:56,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:19:56,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:19:56,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:19:56,750 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 [2019-10-14 23:19:56,764 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:19:56,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:19:56,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:19:56,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:19:56,766 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:19:56,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:19:56,767 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:19:56,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:19:56,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:19:56,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:19:56,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:19:56,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:19:56,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:19:56,768 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:19:56,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:19:56,769 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:19:56,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:19:56,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:19:56,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:19:56,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:19:56,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:19:56,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:19:56,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:19:56,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:19:56,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:19:56,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:19:56,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:19:56,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:19:56,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:19:57,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:19:57,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:19:57,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:19:57,078 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:19:57,079 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:19:57,079 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-14 23:19:57,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45d8adad/8fc71cef318345019e6dffb30332517e/FLAG1cf4d9737 [2019-10-14 23:19:57,765 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:19:57,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-14 23:19:57,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45d8adad/8fc71cef318345019e6dffb30332517e/FLAG1cf4d9737 [2019-10-14 23:19:57,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45d8adad/8fc71cef318345019e6dffb30332517e [2019-10-14 23:19:57,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:19:57,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:19:57,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:19:57,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:19:57,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:19:57,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:19:57" (1/1) ... [2019-10-14 23:19:57,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3534b1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:57, skipping insertion in model container [2019-10-14 23:19:57,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:19:57" (1/1) ... [2019-10-14 23:19:58,003 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:19:58,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:19:58,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:19:58,788 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:19:58,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:19:59,005 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:19:59,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59 WrapperNode [2019-10-14 23:19:59,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:19:59,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:19:59,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:19:59,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:19:59,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (1/1) ... [2019-10-14 23:19:59,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:19:59,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:19:59,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:19:59,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:19:59,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (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 [2019-10-14 23:19:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:19:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:19:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-14 23:19:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-14 23:19:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-14 23:19:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-14 23:19:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-14 23:19:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-14 23:19:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-14 23:19:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-14 23:19:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-14 23:19:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-14 23:19:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-14 23:19:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-14 23:19:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-14 23:19:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-14 23:19:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-14 23:19:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-14 23:19:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-14 23:19:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-14 23:19:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-14 23:19:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-14 23:19:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-14 23:19:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-14 23:19:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-14 23:19:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-14 23:19:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-14 23:19:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-14 23:19:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-14 23:19:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-14 23:19:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-14 23:19:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-14 23:19:59,327 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-14 23:19:59,327 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-14 23:19:59,327 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-14 23:19:59,327 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-14 23:19:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-14 23:19:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-14 23:19:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-14 23:19:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-14 23:19:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-14 23:19:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-14 23:19:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-14 23:19:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-14 23:19:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-14 23:19:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-14 23:19:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-14 23:19:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-14 23:19:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-14 23:19:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-14 23:19:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-14 23:19:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-14 23:19:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-14 23:19:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-14 23:19:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-14 23:19:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-14 23:19:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-14 23:19:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-14 23:19:59,334 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-14 23:19:59,334 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-14 23:19:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-14 23:19:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-14 23:19:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-14 23:19:59,335 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-14 23:19:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-14 23:19:59,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:19:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:19:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:19:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-14 23:19:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-14 23:19:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-14 23:19:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-14 23:19:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-14 23:19:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-14 23:19:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-14 23:19:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-14 23:19:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-14 23:19:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-14 23:19:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:19:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:19:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:19:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-14 23:19:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:19:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:19:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:19:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:19:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-14 23:19:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-14 23:19:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:19:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-14 23:19:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-14 23:19:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-14 23:19:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-14 23:19:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-14 23:19:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-14 23:19:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-14 23:19:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-14 23:19:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-14 23:19:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-14 23:19:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-14 23:19:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-14 23:19:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-14 23:19:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-14 23:19:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-14 23:19:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-14 23:19:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-14 23:19:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-14 23:19:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-14 23:19:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-14 23:19:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-14 23:19:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-14 23:19:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-14 23:19:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-14 23:19:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-14 23:19:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-14 23:19:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2019-10-14 23:19:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2019-10-14 23:19:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-14 23:19:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-14 23:19:59,353 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-14 23:19:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-14 23:19:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-14 23:19:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-14 23:19:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-14 23:19:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-14 23:19:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-14 23:19:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-14 23:19:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-14 23:19:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-14 23:19:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:19:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-14 23:19:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-14 23:19:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:19:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:20:02,085 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:20:02,086 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-14 23:20:02,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:02 BoogieIcfgContainer [2019-10-14 23:20:02,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:20:02,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:20:02,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:20:02,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:20:02,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:19:57" (1/3) ... [2019-10-14 23:20:02,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbbb2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:02, skipping insertion in model container [2019-10-14 23:20:02,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:19:59" (2/3) ... [2019-10-14 23:20:02,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbbb2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:02, skipping insertion in model container [2019-10-14 23:20:02,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:02" (3/3) ... [2019-10-14 23:20:02,096 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2019-10-14 23:20:02,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:20:02,117 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:20:02,129 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:20:02,169 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:20:02,169 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:20:02,170 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:20:02,170 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:20:02,170 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:20:02,170 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:20:02,170 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:20:02,170 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:20:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states. [2019-10-14 23:20:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:20:02,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:02,225 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] [2019-10-14 23:20:02,227 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash 126544023, now seen corresponding path program 1 times [2019-10-14 23:20:02,242 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:02,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152454754] [2019-10-14 23:20:02,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:02,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:02,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,005 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,388 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,610 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:05,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152454754] [2019-10-14 23:20:05,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733382915] [2019-10-14 23:20:05,059 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 [2019-10-14 23:20:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:05,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 23:20:05,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:20:05,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:05,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2019-10-14 23:20:05,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307523608] [2019-10-14 23:20:05,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:20:05,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:20:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:20:05,929 INFO L87 Difference]: Start difference. First operand 759 states. Second operand 2 states. [2019-10-14 23:20:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:06,002 INFO L93 Difference]: Finished difference Result 635 states and 1015 transitions. [2019-10-14 23:20:06,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:20:06,004 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-14 23:20:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:06,045 INFO L225 Difference]: With dead ends: 635 [2019-10-14 23:20:06,045 INFO L226 Difference]: Without dead ends: 598 [2019-10-14 23:20:06,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:20:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-14 23:20:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-14 23:20:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-14 23:20:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 960 transitions. [2019-10-14 23:20:06,151 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 960 transitions. Word has length 116 [2019-10-14 23:20:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:06,154 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 960 transitions. [2019-10-14 23:20:06,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:20:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 960 transitions. [2019-10-14 23:20:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:20:06,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:06,160 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] [2019-10-14 23:20:06,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:06,376 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash 845887242, now seen corresponding path program 1 times [2019-10-14 23:20:06,377 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:06,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477515924] [2019-10-14 23:20:06,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:06,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:06,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,706 WARN L191 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,025 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,209 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:08,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477515924] [2019-10-14 23:20:08,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048530454] [2019-10-14 23:20:08,539 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 [2019-10-14 23:20:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:09,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:09,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:20:09,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:09,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-10-14 23:20:09,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133437382] [2019-10-14 23:20:09,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:09,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:09,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:20:09,278 INFO L87 Difference]: Start difference. First operand 598 states and 960 transitions. Second operand 4 states. [2019-10-14 23:20:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:09,431 INFO L93 Difference]: Finished difference Result 1168 states and 1893 transitions. [2019-10-14 23:20:09,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:20:09,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-14 23:20:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:09,444 INFO L225 Difference]: With dead ends: 1168 [2019-10-14 23:20:09,444 INFO L226 Difference]: Without dead ends: 598 [2019-10-14 23:20:09,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:20:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-14 23:20:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-14 23:20:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-14 23:20:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 959 transitions. [2019-10-14 23:20:09,525 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 959 transitions. Word has length 118 [2019-10-14 23:20:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:09,526 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 959 transitions. [2019-10-14 23:20:09,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 959 transitions. [2019-10-14 23:20:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:20:09,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:09,534 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] [2019-10-14 23:20:09,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:09,735 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1248298604, now seen corresponding path program 1 times [2019-10-14 23:20:09,736 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:09,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979539112] [2019-10-14 23:20:09,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:09,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:09,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:10,984 WARN L191 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,288 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,570 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:11,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979539112] [2019-10-14 23:20:11,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114702868] [2019-10-14 23:20:11,841 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 [2019-10-14 23:20:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:12,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:12,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:20:12,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:12,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-10-14 23:20:12,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031971873] [2019-10-14 23:20:12,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:12,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:12,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:20:12,566 INFO L87 Difference]: Start difference. First operand 598 states and 959 transitions. Second operand 4 states. [2019-10-14 23:20:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:12,679 INFO L93 Difference]: Finished difference Result 1168 states and 1891 transitions. [2019-10-14 23:20:12,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:20:12,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-14 23:20:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:12,691 INFO L225 Difference]: With dead ends: 1168 [2019-10-14 23:20:12,691 INFO L226 Difference]: Without dead ends: 598 [2019-10-14 23:20:12,696 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:20:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-14 23:20:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-14 23:20:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-14 23:20:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 958 transitions. [2019-10-14 23:20:12,743 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 958 transitions. Word has length 120 [2019-10-14 23:20:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:12,744 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 958 transitions. [2019-10-14 23:20:12,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 958 transitions. [2019-10-14 23:20:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:20:12,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:12,747 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] [2019-10-14 23:20:12,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:12,959 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1488778386, now seen corresponding path program 1 times [2019-10-14 23:20:12,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:12,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27395533] [2019-10-14 23:20:12,961 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:12,961 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:12,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,155 WARN L191 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,477 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,662 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:15,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27395533] [2019-10-14 23:20:15,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472851351] [2019-10-14 23:20:15,043 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 [2019-10-14 23:20:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:15,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:15,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:20:15,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:15,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-10-14 23:20:15,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558631479] [2019-10-14 23:20:15,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:15,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:20:15,812 INFO L87 Difference]: Start difference. First operand 598 states and 958 transitions. Second operand 4 states. [2019-10-14 23:20:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:15,904 INFO L93 Difference]: Finished difference Result 1175 states and 1898 transitions. [2019-10-14 23:20:15,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:20:15,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-14 23:20:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:15,910 INFO L225 Difference]: With dead ends: 1175 [2019-10-14 23:20:15,910 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:20:15,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:20:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:20:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-14 23:20:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-14 23:20:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 970 transitions. [2019-10-14 23:20:15,938 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 970 transitions. Word has length 122 [2019-10-14 23:20:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:15,938 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 970 transitions. [2019-10-14 23:20:15,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 970 transitions. [2019-10-14 23:20:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:20:15,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:15,941 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] [2019-10-14 23:20:16,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:16,158 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:16,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1725323163, now seen corresponding path program 1 times [2019-10-14 23:20:16,158 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:16,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275957644] [2019-10-14 23:20:16,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:16,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:16,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,406 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,727 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,923 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:18,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275957644] [2019-10-14 23:20:18,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533627926] [2019-10-14 23:20:18,180 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 [2019-10-14 23:20:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:18,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:18,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:20:18,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:18,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-10-14 23:20:18,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263845904] [2019-10-14 23:20:18,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:18,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:20:18,912 INFO L87 Difference]: Start difference. First operand 607 states and 970 transitions. Second operand 4 states. [2019-10-14 23:20:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:19,003 INFO L93 Difference]: Finished difference Result 1177 states and 1899 transitions. [2019-10-14 23:20:19,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:20:19,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-14 23:20:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:19,013 INFO L225 Difference]: With dead ends: 1177 [2019-10-14 23:20:19,013 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:20:19,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:20:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:20:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-14 23:20:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-14 23:20:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 969 transitions. [2019-10-14 23:20:19,053 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 969 transitions. Word has length 123 [2019-10-14 23:20:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:19,054 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 969 transitions. [2019-10-14 23:20:19,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 969 transitions. [2019-10-14 23:20:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:20:19,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:19,062 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] [2019-10-14 23:20:19,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:19,273 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:19,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1073190474, now seen corresponding path program 1 times [2019-10-14 23:20:19,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:19,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591034169] [2019-10-14 23:20:19,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:19,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:19,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,695 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,003 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,188 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:20:21,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591034169] [2019-10-14 23:20:21,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640513460] [2019-10-14 23:20:21,456 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 [2019-10-14 23:20:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:22,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:22,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:20:22,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:22,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-10-14 23:20:22,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488818232] [2019-10-14 23:20:22,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:22,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:20:22,272 INFO L87 Difference]: Start difference. First operand 607 states and 969 transitions. Second operand 4 states. [2019-10-14 23:20:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:22,361 INFO L93 Difference]: Finished difference Result 1177 states and 1898 transitions. [2019-10-14 23:20:22,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:20:22,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-14 23:20:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:22,370 INFO L225 Difference]: With dead ends: 1177 [2019-10-14 23:20:22,370 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:20:22,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:20:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:20:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-14 23:20:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-14 23:20:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 968 transitions. [2019-10-14 23:20:22,398 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 968 transitions. Word has length 124 [2019-10-14 23:20:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:22,399 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 968 transitions. [2019-10-14 23:20:22,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 968 transitions. [2019-10-14 23:20:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 23:20:22,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:22,403 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] [2019-10-14 23:20:22,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:22,612 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 825732863, now seen corresponding path program 1 times [2019-10-14 23:20:22,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:22,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324163665] [2019-10-14 23:20:22,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:22,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:22,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,842 WARN L191 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,339 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,588 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:20:24,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324163665] [2019-10-14 23:20:24,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737391155] [2019-10-14 23:20:24,953 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 [2019-10-14 23:20:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:25,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:25,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:20:25,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:25,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2019-10-14 23:20:25,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826059560] [2019-10-14 23:20:25,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:25,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:20:25,846 INFO L87 Difference]: Start difference. First operand 607 states and 968 transitions. Second operand 4 states. [2019-10-14 23:20:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:26,056 INFO L93 Difference]: Finished difference Result 1176 states and 1898 transitions. [2019-10-14 23:20:26,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:20:26,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-14 23:20:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:26,063 INFO L225 Difference]: With dead ends: 1176 [2019-10-14 23:20:26,063 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:20:26,067 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:20:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:20:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-14 23:20:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-14 23:20:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 963 transitions. [2019-10-14 23:20:26,096 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 963 transitions. Word has length 125 [2019-10-14 23:20:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:26,096 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 963 transitions. [2019-10-14 23:20:26,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 963 transitions. [2019-10-14 23:20:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 23:20:26,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:26,099 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] [2019-10-14 23:20:26,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:26,309 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash -215123635, now seen corresponding path program 1 times [2019-10-14 23:20:26,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:26,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790668043] [2019-10-14 23:20:26,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:26,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:26,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,534 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:27,874 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,068 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:20:28,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790668043] [2019-10-14 23:20:28,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720473383] [2019-10-14 23:20:28,644 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 [2019-10-14 23:20:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:29,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:29,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:20:29,542 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:29,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2019-10-14 23:20:29,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017308009] [2019-10-14 23:20:29,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:29,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:20:29,547 INFO L87 Difference]: Start difference. First operand 607 states and 963 transitions. Second operand 4 states. [2019-10-14 23:20:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:20:29,707 INFO L93 Difference]: Finished difference Result 1176 states and 1888 transitions. [2019-10-14 23:20:29,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:20:29,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-14 23:20:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:20:29,713 INFO L225 Difference]: With dead ends: 1176 [2019-10-14 23:20:29,714 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:20:29,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:20:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:20:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-14 23:20:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-14 23:20:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 958 transitions. [2019-10-14 23:20:29,738 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 958 transitions. Word has length 127 [2019-10-14 23:20:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:20:29,738 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 958 transitions. [2019-10-14 23:20:29,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:20:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 958 transitions. [2019-10-14 23:20:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:20:29,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:20:29,742 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] [2019-10-14 23:20:29,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:20:29,953 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:20:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:20:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash -585805579, now seen corresponding path program 1 times [2019-10-14 23:20:29,954 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:20:29,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621855375] [2019-10-14 23:20:29,955 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:29,955 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:20:29,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:20:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,302 WARN L191 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 397 [2019-10-14 23:20:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,641 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-14 23:20:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,825 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:20:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:20:32,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621855375] [2019-10-14 23:20:32,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066021515] [2019-10-14 23:20:32,170 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 [2019-10-14 23:20:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:20:32,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:20:32,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:20:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:20:32,903 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:20:32,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2019-10-14 23:20:32,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256233293] [2019-10-14 23:20:32,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:20:32,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:20:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:20:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:20:32,905 INFO L87 Difference]: Start difference. First operand 607 states and 958 transitions. Second operand 4 states.