java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:41,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:41,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:41,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:41,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:41,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:41,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:41,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:41,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:41,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:41,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:41,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:41,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:41,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:41,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:41,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:41,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:41,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:41,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:41,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:41,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:41,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:41,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:41,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:41,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:41,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:41,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:41,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:41,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:41,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:41,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:41,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:41,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:41,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:41,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:41,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:41,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:41,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:41,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:41,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:41,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:41,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:41,857 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:41,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:41,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:41,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:41,860 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:41,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:41,860 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:41,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:41,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:41,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:41,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:41,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:41,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:41,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:41,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:41,863 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:41,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:41,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:41,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:41,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:41,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:41,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:41,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:41,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:41,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:41,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:41,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:41,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:41,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:42,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:42,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:42,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:42,203 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:42,204 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:42,204 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-10-13 21:09:42,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2041ff17f/11578a27d97c45a09040bceb12156251/FLAG469e3f9cb [2019-10-13 21:09:42,872 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:42,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-10-13 21:09:42,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2041ff17f/11578a27d97c45a09040bceb12156251/FLAG469e3f9cb [2019-10-13 21:09:43,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2041ff17f/11578a27d97c45a09040bceb12156251 [2019-10-13 21:09:43,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:43,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:43,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:43,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc90f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43, skipping insertion in model container [2019-10-13 21:09:43,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,161 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:43,240 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:43,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:43,941 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:44,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:44,198 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:44,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44 WrapperNode [2019-10-13 21:09:44,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:44,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:44,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:44,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:44,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... [2019-10-13 21:09:44,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:44,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:44,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:44,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:44,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:44,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:44,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:44,537 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:44,537 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:44,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:44,541 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:44,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:44,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:44,542 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:44,542 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:44,542 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:44,543 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:44,543 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:09:44,543 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:44,543 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:44,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:44,545 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:44,546 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:44,546 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:44,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:44,546 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:44,546 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:44,547 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:44,548 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:44,550 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:46,910 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:46,912 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:46,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46 BoogieIcfgContainer [2019-10-13 21:09:46,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:46,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:46,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:46,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:46,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:43" (1/3) ... [2019-10-13 21:09:46,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60094328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44" (2/3) ... [2019-10-13 21:09:46,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60094328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46" (3/3) ... [2019-10-13 21:09:46,926 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2019-10-13 21:09:46,938 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:46,949 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:46,963 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:47,014 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:47,014 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:47,015 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:47,015 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:47,015 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:47,015 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:47,015 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:47,015 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2019-10-13 21:09:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:09:47,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:47,089 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] [2019-10-13 21:09:47,091 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash 669576515, now seen corresponding path program 1 times [2019-10-13 21:09:47,107 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:47,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307013303] [2019-10-13 21:09:47,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:47,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307013303] [2019-10-13 21:09:47,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369250328] [2019-10-13 21:09:47,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:48,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,505 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,683 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:48,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:48,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358908498] [2019-10-13 21:09:48,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:48,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,708 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 2 states. [2019-10-13 21:09:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,833 INFO L93 Difference]: Finished difference Result 663 states and 1051 transitions. [2019-10-13 21:09:48,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:48,834 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:09:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,871 INFO L225 Difference]: With dead ends: 663 [2019-10-13 21:09:48,872 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:48,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 996 transitions. [2019-10-13 21:09:48,999 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 996 transitions. Word has length 116 [2019-10-13 21:09:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:49,001 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 996 transitions. [2019-10-13 21:09:49,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 996 transitions. [2019-10-13 21:09:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:09:49,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,005 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] [2019-10-13 21:09:49,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,215 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 835424246, now seen corresponding path program 1 times [2019-10-13 21:09:49,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764208001] [2019-10-13 21:09:49,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:49,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764208001] [2019-10-13 21:09:49,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851017556] [2019-10-13 21:09:49,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:50,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:50,326 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:50,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:50,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797429423] [2019-10-13 21:09:50,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:50,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:50,329 INFO L87 Difference]: Start difference. First operand 626 states and 996 transitions. Second operand 4 states. [2019-10-13 21:09:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,511 INFO L93 Difference]: Finished difference Result 1224 states and 1965 transitions. [2019-10-13 21:09:50,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:50,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:09:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,522 INFO L225 Difference]: With dead ends: 1224 [2019-10-13 21:09:50,522 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:50,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 995 transitions. [2019-10-13 21:09:50,593 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 995 transitions. Word has length 118 [2019-10-13 21:09:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,594 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 995 transitions. [2019-10-13 21:09:50,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 995 transitions. [2019-10-13 21:09:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:09:50,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,600 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] [2019-10-13 21:09:50,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,803 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash 963635798, now seen corresponding path program 1 times [2019-10-13 21:09:50,804 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116395992] [2019-10-13 21:09:50,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:50,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116395992] [2019-10-13 21:09:50,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865838615] [2019-10-13 21:09:50,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:51,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,829 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:51,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46033004] [2019-10-13 21:09:51,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,836 INFO L87 Difference]: Start difference. First operand 626 states and 995 transitions. Second operand 4 states. [2019-10-13 21:09:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:51,920 INFO L93 Difference]: Finished difference Result 1224 states and 1963 transitions. [2019-10-13 21:09:51,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:51,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:09:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:51,926 INFO L225 Difference]: With dead ends: 1224 [2019-10-13 21:09:51,927 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:51,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 994 transitions. [2019-10-13 21:09:51,964 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 994 transitions. Word has length 120 [2019-10-13 21:09:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:51,964 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 994 transitions. [2019-10-13 21:09:51,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 994 transitions. [2019-10-13 21:09:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:09:51,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,968 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] [2019-10-13 21:09:52,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,184 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash 684702014, now seen corresponding path program 1 times [2019-10-13 21:09:52,184 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169903332] [2019-10-13 21:09:52,185 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,185 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:52,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169903332] [2019-10-13 21:09:52,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434451375] [2019-10-13 21:09:52,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:52,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:52,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:53,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:53,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:53,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15656339] [2019-10-13 21:09:53,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:53,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:53,167 INFO L87 Difference]: Start difference. First operand 626 states and 994 transitions. Second operand 4 states. [2019-10-13 21:09:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,248 INFO L93 Difference]: Finished difference Result 1231 states and 1970 transitions. [2019-10-13 21:09:53,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:53,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:09:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,253 INFO L225 Difference]: With dead ends: 1231 [2019-10-13 21:09:53,254 INFO L226 Difference]: Without dead ends: 635 [2019-10-13 21:09:53,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-13 21:09:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-13 21:09:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-13 21:09:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1006 transitions. [2019-10-13 21:09:53,283 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1006 transitions. Word has length 122 [2019-10-13 21:09:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,284 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1006 transitions. [2019-10-13 21:09:53,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1006 transitions. [2019-10-13 21:09:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:09:53,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,287 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] [2019-10-13 21:09:53,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,504 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1568855861, now seen corresponding path program 1 times [2019-10-13 21:09:53,504 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811034302] [2019-10-13 21:09:53,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:53,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811034302] [2019-10-13 21:09:53,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720984093] [2019-10-13 21:09:53,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:54,342 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:54,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:54,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:54,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059817592] [2019-10-13 21:09:54,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:54,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:54,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:54,549 INFO L87 Difference]: Start difference. First operand 635 states and 1006 transitions. Second operand 4 states. [2019-10-13 21:09:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:54,666 INFO L93 Difference]: Finished difference Result 1233 states and 1971 transitions. [2019-10-13 21:09:54,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:54,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:09:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:54,686 INFO L225 Difference]: With dead ends: 1233 [2019-10-13 21:09:54,687 INFO L226 Difference]: Without dead ends: 635 [2019-10-13 21:09:54,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-13 21:09:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-13 21:09:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-13 21:09:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1005 transitions. [2019-10-13 21:09:54,727 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1005 transitions. Word has length 123 [2019-10-13 21:09:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:54,728 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1005 transitions. [2019-10-13 21:09:54,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1005 transitions. [2019-10-13 21:09:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:09:54,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:54,735 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] [2019-10-13 21:09:54,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,947 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash 43826914, now seen corresponding path program 1 times [2019-10-13 21:09:54,948 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:54,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866203555] [2019-10-13 21:09:54,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:55,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866203555] [2019-10-13 21:09:55,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632760672] [2019-10-13 21:09:55,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:55,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:55,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:55,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:55,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544084534] [2019-10-13 21:09:55,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:55,990 INFO L87 Difference]: Start difference. First operand 635 states and 1005 transitions. Second operand 4 states. [2019-10-13 21:09:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,064 INFO L93 Difference]: Finished difference Result 1233 states and 1970 transitions. [2019-10-13 21:09:56,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:56,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:09:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,071 INFO L225 Difference]: With dead ends: 1233 [2019-10-13 21:09:56,071 INFO L226 Difference]: Without dead ends: 635 [2019-10-13 21:09:56,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-13 21:09:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-13 21:09:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-13 21:09:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1004 transitions. [2019-10-13 21:09:56,099 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1004 transitions. Word has length 124 [2019-10-13 21:09:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,099 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1004 transitions. [2019-10-13 21:09:56,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1004 transitions. [2019-10-13 21:09:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:09:56,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,102 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] [2019-10-13 21:09:56,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,310 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1250885551, now seen corresponding path program 1 times [2019-10-13 21:09:56,311 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:56,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255066293] [2019-10-13 21:09:56,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:56,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255066293] [2019-10-13 21:09:56,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830855361] [2019-10-13 21:09:56,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:57,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:57,613 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:57,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:57,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503690013] [2019-10-13 21:09:57,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:57,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:57,615 INFO L87 Difference]: Start difference. First operand 635 states and 1004 transitions. Second operand 7 states. [2019-10-13 21:09:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:57,781 INFO L93 Difference]: Finished difference Result 1240 states and 1979 transitions. [2019-10-13 21:09:57,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:57,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-10-13 21:09:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:57,789 INFO L225 Difference]: With dead ends: 1240 [2019-10-13 21:09:57,790 INFO L226 Difference]: Without dead ends: 646 [2019-10-13 21:09:57,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-13 21:09:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 642. [2019-10-13 21:09:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:09:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1014 transitions. [2019-10-13 21:09:57,825 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1014 transitions. Word has length 125 [2019-10-13 21:09:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:57,826 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1014 transitions. [2019-10-13 21:09:57,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1014 transitions. [2019-10-13 21:09:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:09:57,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:57,829 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] [2019-10-13 21:09:58,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,037 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 865518768, now seen corresponding path program 1 times [2019-10-13 21:09:58,038 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627016532] [2019-10-13 21:09:58,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627016532] [2019-10-13 21:09:58,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936865779] [2019-10-13 21:09:58,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:58,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:58,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992665621] [2019-10-13 21:09:59,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,047 INFO L87 Difference]: Start difference. First operand 642 states and 1014 transitions. Second operand 4 states. [2019-10-13 21:09:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,219 INFO L93 Difference]: Finished difference Result 1245 states and 1990 transitions. [2019-10-13 21:09:59,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:59,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:09:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,228 INFO L225 Difference]: With dead ends: 1245 [2019-10-13 21:09:59,229 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:09:59,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:09:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:09:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:09:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1009 transitions. [2019-10-13 21:09:59,257 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1009 transitions. Word has length 125 [2019-10-13 21:09:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,257 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1009 transitions. [2019-10-13 21:09:59,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1009 transitions. [2019-10-13 21:09:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 21:09:59,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,260 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:59,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,476 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash -162638701, now seen corresponding path program 1 times [2019-10-13 21:09:59,477 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:59,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962295165] [2019-10-13 21:09:59,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:09:59,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962295165] [2019-10-13 21:09:59,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597922722] [2019-10-13 21:09:59,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:00,490 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:00,695 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:00,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:00,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278559487] [2019-10-13 21:10:00,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:00,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:00,698 INFO L87 Difference]: Start difference. First operand 642 states and 1009 transitions. Second operand 4 states. [2019-10-13 21:10:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,876 INFO L93 Difference]: Finished difference Result 1245 states and 1980 transitions. [2019-10-13 21:10:00,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:00,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-10-13 21:10:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,881 INFO L225 Difference]: With dead ends: 1245 [2019-10-13 21:10:00,882 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:00,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1004 transitions. [2019-10-13 21:10:00,906 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1004 transitions. Word has length 128 [2019-10-13 21:10:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,907 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1004 transitions. [2019-10-13 21:10:00,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1004 transitions. [2019-10-13 21:10:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:00,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,909 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:01,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,123 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2001392257, now seen corresponding path program 1 times [2019-10-13 21:10:01,124 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382466310] [2019-10-13 21:10:01,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:01,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382466310] [2019-10-13 21:10:01,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512780314] [2019-10-13 21:10:01,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:02,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:02,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981005429] [2019-10-13 21:10:02,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:02,275 INFO L87 Difference]: Start difference. First operand 642 states and 1004 transitions. Second operand 4 states. [2019-10-13 21:10:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,509 INFO L93 Difference]: Finished difference Result 1281 states and 2028 transitions. [2019-10-13 21:10:02,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:02,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,514 INFO L225 Difference]: With dead ends: 1281 [2019-10-13 21:10:02,515 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:10:02,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:10:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2019-10-13 21:10:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-13 21:10:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1067 transitions. [2019-10-13 21:10:02,541 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1067 transitions. Word has length 130 [2019-10-13 21:10:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,542 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1067 transitions. [2019-10-13 21:10:02,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1067 transitions. [2019-10-13 21:10:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:02,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,544 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:02,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,759 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1601209857, now seen corresponding path program 1 times [2019-10-13 21:10:02,760 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225524825] [2019-10-13 21:10:02,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:02,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225524825] [2019-10-13 21:10:02,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278492835] [2019-10-13 21:10:02,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:03,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:04,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:04,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564156043] [2019-10-13 21:10:04,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:04,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:04,230 INFO L87 Difference]: Start difference. First operand 681 states and 1067 transitions. Second operand 9 states. [2019-10-13 21:10:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,489 INFO L93 Difference]: Finished difference Result 1286 states and 2033 transitions. [2019-10-13 21:10:04,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:04,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,495 INFO L225 Difference]: With dead ends: 1286 [2019-10-13 21:10:04,495 INFO L226 Difference]: Without dead ends: 692 [2019-10-13 21:10:04,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-13 21:10:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2019-10-13 21:10:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:10:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1071 transitions. [2019-10-13 21:10:04,532 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1071 transitions. Word has length 130 [2019-10-13 21:10:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,533 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1071 transitions. [2019-10-13 21:10:04,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1071 transitions. [2019-10-13 21:10:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:04,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,536 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,752 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 791722400, now seen corresponding path program 1 times [2019-10-13 21:10:04,753 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64762738] [2019-10-13 21:10:04,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:04,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64762738] [2019-10-13 21:10:04,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806399065] [2019-10-13 21:10:04,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:05,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:05,924 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:05,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:05,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418492222] [2019-10-13 21:10:05,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:05,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:05,926 INFO L87 Difference]: Start difference. First operand 683 states and 1071 transitions. Second operand 11 states. [2019-10-13 21:10:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,078 INFO L93 Difference]: Finished difference Result 1222 states and 1933 transitions. [2019-10-13 21:10:06,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:06,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,084 INFO L225 Difference]: With dead ends: 1222 [2019-10-13 21:10:06,084 INFO L226 Difference]: Without dead ends: 700 [2019-10-13 21:10:06,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-13 21:10:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2019-10-13 21:10:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1081 transitions. [2019-10-13 21:10:06,119 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1081 transitions. Word has length 130 [2019-10-13 21:10:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,121 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1081 transitions. [2019-10-13 21:10:06,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1081 transitions. [2019-10-13 21:10:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:06,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,124 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,334 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,334 INFO L82 PathProgramCache]: Analyzing trace with hash -897013069, now seen corresponding path program 1 times [2019-10-13 21:10:06,334 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776256974] [2019-10-13 21:10:06,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:06,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776256974] [2019-10-13 21:10:06,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880782694] [2019-10-13 21:10:06,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:07,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:07,429 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:07,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:07,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669601045] [2019-10-13 21:10:07,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:07,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:07,431 INFO L87 Difference]: Start difference. First operand 690 states and 1081 transitions. Second operand 4 states. [2019-10-13 21:10:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,623 INFO L93 Difference]: Finished difference Result 1299 states and 2054 transitions. [2019-10-13 21:10:07,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:07,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-13 21:10:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,633 INFO L225 Difference]: With dead ends: 1299 [2019-10-13 21:10:07,633 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:07,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-13 21:10:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-13 21:10:07,661 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 131 [2019-10-13 21:10:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,662 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-13 21:10:07,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-13 21:10:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:07,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,665 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:07,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,876 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash -257623020, now seen corresponding path program 1 times [2019-10-13 21:10:07,877 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923367680] [2019-10-13 21:10:07,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:07,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923367680] [2019-10-13 21:10:07,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570154126] [2019-10-13 21:10:07,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:08,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,060 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:09,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:09,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010022208] [2019-10-13 21:10:09,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:09,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:09,062 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 8 states. [2019-10-13 21:10:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,169 INFO L93 Difference]: Finished difference Result 1226 states and 1937 transitions. [2019-10-13 21:10:09,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:09,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-13 21:10:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,175 INFO L225 Difference]: With dead ends: 1226 [2019-10-13 21:10:09,175 INFO L226 Difference]: Without dead ends: 704 [2019-10-13 21:10:09,178 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-13 21:10:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2019-10-13 21:10:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:10:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1087 transitions. [2019-10-13 21:10:09,203 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1087 transitions. Word has length 131 [2019-10-13 21:10:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,204 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1087 transitions. [2019-10-13 21:10:09,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1087 transitions. [2019-10-13 21:10:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:09,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,206 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,415 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -63351501, now seen corresponding path program 1 times [2019-10-13 21:10:09,416 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520275151] [2019-10-13 21:10:09,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:09,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520275151] [2019-10-13 21:10:09,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113969756] [2019-10-13 21:10:09,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:10,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:10,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:10,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013076590] [2019-10-13 21:10:10,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:10,531 INFO L87 Difference]: Start difference. First operand 697 states and 1087 transitions. Second operand 4 states. [2019-10-13 21:10:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,741 INFO L93 Difference]: Finished difference Result 1313 states and 2071 transitions. [2019-10-13 21:10:10,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-13 21:10:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,748 INFO L225 Difference]: With dead ends: 1313 [2019-10-13 21:10:10,748 INFO L226 Difference]: Without dead ends: 697 [2019-10-13 21:10:10,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-13 21:10:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2019-10-13 21:10:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:10:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-10-13 21:10:10,813 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 132 [2019-10-13 21:10:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,814 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-10-13 21:10:10,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-10-13 21:10:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:10,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,819 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:11,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,032 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash -346652232, now seen corresponding path program 1 times [2019-10-13 21:10:11,032 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:11,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394463211] [2019-10-13 21:10:11,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:11,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394463211] [2019-10-13 21:10:11,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40799109] [2019-10-13 21:10:11,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:12,079 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:12,583 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:12,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:12,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140870323] [2019-10-13 21:10:12,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:12,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:12,586 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 14 states. [2019-10-13 21:10:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,909 INFO L93 Difference]: Finished difference Result 1227 states and 1932 transitions. [2019-10-13 21:10:12,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:12,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-13 21:10:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,916 INFO L225 Difference]: With dead ends: 1227 [2019-10-13 21:10:12,916 INFO L226 Difference]: Without dead ends: 705 [2019-10-13 21:10:12,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-13 21:10:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 697. [2019-10-13 21:10:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:10:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-10-13 21:10:12,940 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 133 [2019-10-13 21:10:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,940 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-10-13 21:10:12,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-10-13 21:10:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:12,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,943 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:13,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,152 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:13,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1310949591, now seen corresponding path program 1 times [2019-10-13 21:10:13,153 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:13,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971840525] [2019-10-13 21:10:13,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:13,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971840525] [2019-10-13 21:10:13,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255120648] [2019-10-13 21:10:13,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:14,125 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:14,595 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:14,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:14,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888742358] [2019-10-13 21:10:14,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:14,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:14,599 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 11 states. [2019-10-13 21:10:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,791 INFO L93 Difference]: Finished difference Result 1228 states and 1940 transitions. [2019-10-13 21:10:14,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:14,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-13 21:10:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,796 INFO L225 Difference]: With dead ends: 1228 [2019-10-13 21:10:14,797 INFO L226 Difference]: Without dead ends: 706 [2019-10-13 21:10:14,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-13 21:10:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 699. [2019-10-13 21:10:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-13 21:10:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1088 transitions. [2019-10-13 21:10:14,825 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1088 transitions. Word has length 134 [2019-10-13 21:10:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,826 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 1088 transitions. [2019-10-13 21:10:14,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1088 transitions. [2019-10-13 21:10:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:14,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,831 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:15,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,038 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:15,039 INFO L82 PathProgramCache]: Analyzing trace with hash 919812815, now seen corresponding path program 1 times [2019-10-13 21:10:15,039 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:15,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155855541] [2019-10-13 21:10:15,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:15,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155855541] [2019-10-13 21:10:15,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739152888] [2019-10-13 21:10:15,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:15,989 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:16,292 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:16,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:16,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649173497] [2019-10-13 21:10:16,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:16,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:16,294 INFO L87 Difference]: Start difference. First operand 699 states and 1088 transitions. Second operand 9 states. [2019-10-13 21:10:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,421 INFO L93 Difference]: Finished difference Result 1324 states and 2105 transitions. [2019-10-13 21:10:16,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:16,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,426 INFO L225 Difference]: With dead ends: 1324 [2019-10-13 21:10:16,426 INFO L226 Difference]: Without dead ends: 708 [2019-10-13 21:10:16,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2019-10-13 21:10:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2019-10-13 21:10:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-13 21:10:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1096 transitions. [2019-10-13 21:10:16,449 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1096 transitions. Word has length 133 [2019-10-13 21:10:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,450 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1096 transitions. [2019-10-13 21:10:16,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1096 transitions. [2019-10-13 21:10:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:16,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,452 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:16,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,659 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1282992091, now seen corresponding path program 1 times [2019-10-13 21:10:16,660 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046537028] [2019-10-13 21:10:16,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:16,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046537028] [2019-10-13 21:10:16,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594719932] [2019-10-13 21:10:16,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:17,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:17,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:17,854 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:17,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:17,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372765843] [2019-10-13 21:10:17,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:17,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:17,856 INFO L87 Difference]: Start difference. First operand 706 states and 1096 transitions. Second operand 8 states. [2019-10-13 21:10:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,978 INFO L93 Difference]: Finished difference Result 1338 states and 2116 transitions. [2019-10-13 21:10:17,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:17,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-13 21:10:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,983 INFO L225 Difference]: With dead ends: 1338 [2019-10-13 21:10:17,983 INFO L226 Difference]: Without dead ends: 715 [2019-10-13 21:10:17,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-13 21:10:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 710. [2019-10-13 21:10:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710 states. [2019-10-13 21:10:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1102 transitions. [2019-10-13 21:10:18,009 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1102 transitions. Word has length 136 [2019-10-13 21:10:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:18,009 INFO L462 AbstractCegarLoop]: Abstraction has 710 states and 1102 transitions. [2019-10-13 21:10:18,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1102 transitions. [2019-10-13 21:10:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:10:18,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:18,012 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:18,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,220 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1682826604, now seen corresponding path program 1 times [2019-10-13 21:10:18,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:18,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107482651] [2019-10-13 21:10:18,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:18,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107482651] [2019-10-13 21:10:18,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272528848] [2019-10-13 21:10:18,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true