java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:38,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:38,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:38,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:38,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:38,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:38,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:38,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:38,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:38,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:38,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:38,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:38,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:38,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:38,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:38,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:38,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:38,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:38,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:38,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:38,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:38,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:38,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:38,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:38,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:38,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:38,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:38,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:38,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:38,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:38,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:38,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:38,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:38,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:38,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:38,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:38,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:38,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:38,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:38,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:38,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:38,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:38,959 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:38,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:38,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:38,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:38,961 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:38,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:38,961 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:38,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:38,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:38,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:38,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:38,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:38,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:38,963 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:38,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:38,963 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:38,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:38,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:38,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:38,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:38,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:38,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:38,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:38,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:38,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:38,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:38,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:38,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:38,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:39,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:39,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:39,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:39,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:39,308 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:39,309 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-13 21:08:39,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c06fe106/69eb0dc4d86b498ba0d85c9241751818/FLAG54fa56577 [2019-10-13 21:08:40,051 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:40,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-13 21:08:40,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c06fe106/69eb0dc4d86b498ba0d85c9241751818/FLAG54fa56577 [2019-10-13 21:08:40,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c06fe106/69eb0dc4d86b498ba0d85c9241751818 [2019-10-13 21:08:40,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:40,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:40,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:40,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:40,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:40,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3134989e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40, skipping insertion in model container [2019-10-13 21:08:40,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,275 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:40,365 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:41,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:41,210 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:41,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:41,383 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:41,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41 WrapperNode [2019-10-13 21:08:41,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:41,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:41,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:41,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:41,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... [2019-10-13 21:08:41,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:41,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:41,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:41,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:41,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:41,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:41,663 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:41,669 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:41,674 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:41,674 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:41,675 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:41,676 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:41,677 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:41,678 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:41,678 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:41,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:41,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:41,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:41,679 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:41,679 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:08:41,679 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:41,679 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 21:08:41,680 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:41,680 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:41,680 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:41,680 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:41,680 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:41,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:41,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:41,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:41,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:41,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:41,684 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:41,691 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:41,703 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:41,703 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:44,059 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:44,060 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:44,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:44 BoogieIcfgContainer [2019-10-13 21:08:44,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:44,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:44,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:44,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:44,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:40" (1/3) ... [2019-10-13 21:08:44,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61a7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:44, skipping insertion in model container [2019-10-13 21:08:44,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:41" (2/3) ... [2019-10-13 21:08:44,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61a7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:44, skipping insertion in model container [2019-10-13 21:08:44,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:44" (3/3) ... [2019-10-13 21:08:44,076 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2019-10-13 21:08:44,088 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:44,100 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:44,113 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:44,166 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:44,167 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:44,167 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:44,167 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:44,167 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:44,167 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:44,167 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:44,168 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states. [2019-10-13 21:08:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:44,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:44,247 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] [2019-10-13 21:08:44,249 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1657439968, now seen corresponding path program 1 times [2019-10-13 21:08:44,266 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:44,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965110792] [2019-10-13 21:08:44,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:44,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965110792] [2019-10-13 21:08:44,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756643269] [2019-10-13 21:08:44,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:45,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:45,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:45,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:45,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:45,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656438313] [2019-10-13 21:08:45,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:45,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:45,918 INFO L87 Difference]: Start difference. First operand 823 states. Second operand 4 states. [2019-10-13 21:08:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:46,158 INFO L93 Difference]: Finished difference Result 1347 states and 2176 transitions. [2019-10-13 21:08:46,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:46,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-13 21:08:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:46,184 INFO L225 Difference]: With dead ends: 1347 [2019-10-13 21:08:46,184 INFO L226 Difference]: Without dead ends: 679 [2019-10-13 21:08:46,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-13 21:08:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2019-10-13 21:08:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-13 21:08:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2019-10-13 21:08:46,336 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 113 [2019-10-13 21:08:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:46,336 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2019-10-13 21:08:46,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2019-10-13 21:08:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:08:46,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:46,345 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] [2019-10-13 21:08:46,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,547 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1328074300, now seen corresponding path program 1 times [2019-10-13 21:08:46,548 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:46,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691747626] [2019-10-13 21:08:46,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:46,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691747626] [2019-10-13 21:08:46,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647815999] [2019-10-13 21:08:46,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:47,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:47,510 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:47,808 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:47,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:47,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488982667] [2019-10-13 21:08:47,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:47,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:47,811 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand 7 states. [2019-10-13 21:08:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,979 INFO L93 Difference]: Finished difference Result 1341 states and 2139 transitions. [2019-10-13 21:08:47,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:47,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-13 21:08:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,986 INFO L225 Difference]: With dead ends: 1341 [2019-10-13 21:08:47,986 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:08:47,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:08:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 686. [2019-10-13 21:08:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-10-13 21:08:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1088 transitions. [2019-10-13 21:08:48,031 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1088 transitions. Word has length 115 [2019-10-13 21:08:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:48,034 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1088 transitions. [2019-10-13 21:08:48,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1088 transitions. [2019-10-13 21:08:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:48,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:48,037 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] [2019-10-13 21:08:48,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,249 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1848619236, now seen corresponding path program 1 times [2019-10-13 21:08:48,250 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:48,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848854554] [2019-10-13 21:08:48,251 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,251 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:48,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848854554] [2019-10-13 21:08:48,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850153673] [2019-10-13 21:08:48,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:49,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:49,082 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:49,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:49,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:49,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233168003] [2019-10-13 21:08:49,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:49,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:49,227 INFO L87 Difference]: Start difference. First operand 686 states and 1088 transitions. Second operand 4 states. [2019-10-13 21:08:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,330 INFO L93 Difference]: Finished difference Result 1357 states and 2164 transitions. [2019-10-13 21:08:49,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:49,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 21:08:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,346 INFO L225 Difference]: With dead ends: 1357 [2019-10-13 21:08:49,348 INFO L226 Difference]: Without dead ends: 697 [2019-10-13 21:08:49,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-13 21:08:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2019-10-13 21:08:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-13 21:08:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1096 transitions. [2019-10-13 21:08:49,412 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1096 transitions. Word has length 116 [2019-10-13 21:08:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,413 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1096 transitions. [2019-10-13 21:08:49,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1096 transitions. [2019-10-13 21:08:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:49,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,418 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] [2019-10-13 21:08:49,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,626 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,626 INFO L82 PathProgramCache]: Analyzing trace with hash -154321500, now seen corresponding path program 1 times [2019-10-13 21:08:49,626 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977227529] [2019-10-13 21:08:49,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:49,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977227529] [2019-10-13 21:08:49,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692302393] [2019-10-13 21:08:49,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:50,383 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:50,602 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:50,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:50,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92095011] [2019-10-13 21:08:50,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:50,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:50,604 INFO L87 Difference]: Start difference. First operand 695 states and 1096 transitions. Second operand 7 states. [2019-10-13 21:08:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,737 INFO L93 Difference]: Finished difference Result 1358 states and 2155 transitions. [2019-10-13 21:08:50,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:50,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-13 21:08:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,744 INFO L225 Difference]: With dead ends: 1358 [2019-10-13 21:08:50,745 INFO L226 Difference]: Without dead ends: 704 [2019-10-13 21:08:50,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-13 21:08:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 695. [2019-10-13 21:08:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-13 21:08:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1096 transitions. [2019-10-13 21:08:50,781 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1096 transitions. Word has length 116 [2019-10-13 21:08:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,782 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1096 transitions. [2019-10-13 21:08:50,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1096 transitions. [2019-10-13 21:08:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 21:08:50,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,785 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] [2019-10-13 21:08:50,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,993 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash -698243827, now seen corresponding path program 1 times [2019-10-13 21:08:50,994 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:50,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592254811] [2019-10-13 21:08:50,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:51,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592254811] [2019-10-13 21:08:51,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178806102] [2019-10-13 21:08:51,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:51,647 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:51,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:51,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:51,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969997586] [2019-10-13 21:08:51,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:51,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:51,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:51,753 INFO L87 Difference]: Start difference. First operand 695 states and 1096 transitions. Second operand 4 states. [2019-10-13 21:08:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:51,998 INFO L93 Difference]: Finished difference Result 1391 states and 2225 transitions. [2019-10-13 21:08:51,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:51,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-13 21:08:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,006 INFO L225 Difference]: With dead ends: 1391 [2019-10-13 21:08:52,006 INFO L226 Difference]: Without dead ends: 737 [2019-10-13 21:08:52,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-13 21:08:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 734. [2019-10-13 21:08:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:08:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1169 transitions. [2019-10-13 21:08:52,042 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1169 transitions. Word has length 119 [2019-10-13 21:08:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,044 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1169 transitions. [2019-10-13 21:08:52,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1169 transitions. [2019-10-13 21:08:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:08:52,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,050 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] [2019-10-13 21:08:52,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,257 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1098316311, now seen corresponding path program 1 times [2019-10-13 21:08:52,258 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109372918] [2019-10-13 21:08:52,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:52,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109372918] [2019-10-13 21:08:52,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869719552] [2019-10-13 21:08:52,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:53,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,176 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:53,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:53,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086071203] [2019-10-13 21:08:53,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:53,179 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:53,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:53,181 INFO L87 Difference]: Start difference. First operand 734 states and 1169 transitions. Second operand 5 states. [2019-10-13 21:08:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,264 INFO L93 Difference]: Finished difference Result 1415 states and 2271 transitions. [2019-10-13 21:08:53,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:53,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-13 21:08:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,276 INFO L225 Difference]: With dead ends: 1415 [2019-10-13 21:08:53,276 INFO L226 Difference]: Without dead ends: 734 [2019-10-13 21:08:53,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-13 21:08:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-10-13 21:08:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:08:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1164 transitions. [2019-10-13 21:08:53,321 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1164 transitions. Word has length 121 [2019-10-13 21:08:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,321 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1164 transitions. [2019-10-13 21:08:53,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1164 transitions. [2019-10-13 21:08:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:08:53,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,326 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:53,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,536 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1266209205, now seen corresponding path program 1 times [2019-10-13 21:08:53,537 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420501221] [2019-10-13 21:08:53,538 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,538 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420501221] [2019-10-13 21:08:53,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614890908] [2019-10-13 21:08:53,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:54,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:54,652 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:54,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:54,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620549101] [2019-10-13 21:08:54,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:54,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:54,656 INFO L87 Difference]: Start difference. First operand 734 states and 1164 transitions. Second operand 11 states. [2019-10-13 21:08:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,839 INFO L93 Difference]: Finished difference Result 1389 states and 2212 transitions. [2019-10-13 21:08:54,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:54,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-10-13 21:08:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,845 INFO L225 Difference]: With dead ends: 1389 [2019-10-13 21:08:54,846 INFO L226 Difference]: Without dead ends: 754 [2019-10-13 21:08:54,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2019-10-13 21:08:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 741. [2019-10-13 21:08:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:08:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-13 21:08:54,877 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 122 [2019-10-13 21:08:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,878 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-13 21:08:54,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-13 21:08:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:08:54,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,881 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 21:08:55,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,089 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1449069541, now seen corresponding path program 1 times [2019-10-13 21:08:55,090 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849015436] [2019-10-13 21:08:55,090 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:55,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849015436] [2019-10-13 21:08:55,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324795024] [2019-10-13 21:08:55,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:55,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:55,808 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:56,005 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:56,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:08:56,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349733471] [2019-10-13 21:08:56,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:08:56,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:08:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:56,010 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 8 states. [2019-10-13 21:08:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:56,162 INFO L93 Difference]: Finished difference Result 1387 states and 2208 transitions. [2019-10-13 21:08:56,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:56,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-13 21:08:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:56,169 INFO L225 Difference]: With dead ends: 1387 [2019-10-13 21:08:56,169 INFO L226 Difference]: Without dead ends: 752 [2019-10-13 21:08:56,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 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 21:08:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-13 21:08:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 745. [2019-10-13 21:08:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 21:08:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1180 transitions. [2019-10-13 21:08:56,199 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1180 transitions. Word has length 123 [2019-10-13 21:08:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:56,200 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1180 transitions. [2019-10-13 21:08:56,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:08:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1180 transitions. [2019-10-13 21:08:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:08:56,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:56,203 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 21:08:56,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,410 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:56,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1059446297, now seen corresponding path program 1 times [2019-10-13 21:08:56,411 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:56,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148511603] [2019-10-13 21:08:56,411 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,411 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:56,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148511603] [2019-10-13 21:08:56,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381701541] [2019-10-13 21:08:56,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:57,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:57,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:57,291 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:57,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:57,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158276944] [2019-10-13 21:08:57,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:57,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:57,294 INFO L87 Difference]: Start difference. First operand 745 states and 1180 transitions. Second operand 5 states. [2019-10-13 21:08:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,518 INFO L93 Difference]: Finished difference Result 1425 states and 2285 transitions. [2019-10-13 21:08:57,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:57,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-13 21:08:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:57,525 INFO L225 Difference]: With dead ends: 1425 [2019-10-13 21:08:57,525 INFO L226 Difference]: Without dead ends: 790 [2019-10-13 21:08:57,529 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2019-10-13 21:08:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2019-10-13 21:08:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-10-13 21:08:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1256 transitions. [2019-10-13 21:08:57,570 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1256 transitions. Word has length 124 [2019-10-13 21:08:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:57,572 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1256 transitions. [2019-10-13 21:08:57,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1256 transitions. [2019-10-13 21:08:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:08:57,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:57,575 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:57,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,784 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash -968304473, now seen corresponding path program 1 times [2019-10-13 21:08:57,785 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:57,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674483757] [2019-10-13 21:08:57,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:57,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674483757] [2019-10-13 21:08:57,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922339210] [2019-10-13 21:08:57,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:58,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:58,555 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:58,666 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:58,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:58,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727617401] [2019-10-13 21:08:58,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:58,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:58,668 INFO L87 Difference]: Start difference. First operand 787 states and 1256 transitions. Second operand 6 states. [2019-10-13 21:08:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:58,738 INFO L93 Difference]: Finished difference Result 1479 states and 2370 transitions. [2019-10-13 21:08:58,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:58,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 21:08:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:58,744 INFO L225 Difference]: With dead ends: 1479 [2019-10-13 21:08:58,744 INFO L226 Difference]: Without dead ends: 783 [2019-10-13 21:08:58,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-13 21:08:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 780. [2019-10-13 21:08:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-10-13 21:08:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1243 transitions. [2019-10-13 21:08:58,776 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1243 transitions. Word has length 125 [2019-10-13 21:08:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:58,776 INFO L462 AbstractCegarLoop]: Abstraction has 780 states and 1243 transitions. [2019-10-13 21:08:58,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1243 transitions. [2019-10-13 21:08:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:08:58,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:58,780 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:58,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,989 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1832817376, now seen corresponding path program 1 times [2019-10-13 21:08:58,989 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656337902] [2019-10-13 21:08:58,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:59,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656337902] [2019-10-13 21:08:59,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134467689] [2019-10-13 21:08:59,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:08:59,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:08:59,767 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:59,910 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:59,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:08:59,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375647141] [2019-10-13 21:08:59,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:59,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:59,914 INFO L87 Difference]: Start difference. First operand 780 states and 1243 transitions. Second operand 4 states. [2019-10-13 21:09:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:01,021 INFO L93 Difference]: Finished difference Result 2635 states and 4263 transitions. [2019-10-13 21:09:01,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:01,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-13 21:09:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:01,038 INFO L225 Difference]: With dead ends: 2635 [2019-10-13 21:09:01,038 INFO L226 Difference]: Without dead ends: 2004 [2019-10-13 21:09:01,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2019-10-13 21:09:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1858. [2019-10-13 21:09:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1858 states. [2019-10-13 21:09:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3011 transitions. [2019-10-13 21:09:01,142 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3011 transitions. Word has length 126 [2019-10-13 21:09:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:01,145 INFO L462 AbstractCegarLoop]: Abstraction has 1858 states and 3011 transitions. [2019-10-13 21:09:01,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3011 transitions. [2019-10-13 21:09:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:01,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:01,154 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:01,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,362 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash -918204397, now seen corresponding path program 1 times [2019-10-13 21:09:01,363 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:01,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875324322] [2019-10-13 21:09:01,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:01,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875324322] [2019-10-13 21:09:01,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233901441] [2019-10-13 21:09:01,550 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 21:09:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:09:02,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:09:02,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:02,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:02,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:09:02,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569109442] [2019-10-13 21:09:02,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:02,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:02,459 INFO L87 Difference]: Start difference. First operand 1858 states and 3011 transitions. Second operand 4 states. [2019-10-13 21:09:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:02,547 INFO L93 Difference]: Finished difference Result 3675 states and 5982 transitions. [2019-10-13 21:09:02,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:02,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-10-13 21:09:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:02,561 INFO L225 Difference]: With dead ends: 3675 [2019-10-13 21:09:02,561 INFO L226 Difference]: Without dead ends: 1835 [2019-10-13 21:09:02,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2019-10-13 21:09:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1835. [2019-10-13 21:09:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2019-10-13 21:09:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2966 transitions. [2019-10-13 21:09:02,636 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2966 transitions. Word has length 176 [2019-10-13 21:09:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:02,637 INFO L462 AbstractCegarLoop]: Abstraction has 1835 states and 2966 transitions. [2019-10-13 21:09:02,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2966 transitions. [2019-10-13 21:09:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:09:02,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:02,643 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:02,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,851 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 965560856, now seen corresponding path program 1 times [2019-10-13 21:09:02,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:02,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885947545] [2019-10-13 21:09:02,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:02,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885947545] [2019-10-13 21:09:02,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511833586] [2019-10-13 21:09:02,994 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 21:09:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:03,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:03,708 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:03,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:03,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:09:03,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932423134] [2019-10-13 21:09:03,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:03,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:03,919 INFO L87 Difference]: Start difference. First operand 1835 states and 2966 transitions. Second operand 7 states. [2019-10-13 21:09:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:04,073 INFO L93 Difference]: Finished difference Result 3634 states and 5879 transitions. [2019-10-13 21:09:04,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:04,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2019-10-13 21:09:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:04,086 INFO L225 Difference]: With dead ends: 3634 [2019-10-13 21:09:04,087 INFO L226 Difference]: Without dead ends: 1847 [2019-10-13 21:09:04,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2019-10-13 21:09:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1829. [2019-10-13 21:09:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2019-10-13 21:09:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2952 transitions. [2019-10-13 21:09:04,236 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2952 transitions. Word has length 174 [2019-10-13 21:09:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,236 INFO L462 AbstractCegarLoop]: Abstraction has 1829 states and 2952 transitions. [2019-10-13 21:09:04,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2952 transitions. [2019-10-13 21:09:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:09:04,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,244 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:04,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:04,449 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 455100135, now seen corresponding path program 1 times [2019-10-13 21:09:04,449 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:04,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21612576] [2019-10-13 21:09:04,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:04,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21612576] [2019-10-13 21:09:04,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545349522] [2019-10-13 21:09:04,587 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 21:09:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:05,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:05,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:05,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:05,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:05,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:05,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:05,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626785155] [2019-10-13 21:09:05,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:05,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:05,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:05,722 INFO L87 Difference]: Start difference. First operand 1829 states and 2952 transitions. Second operand 9 states. [2019-10-13 21:09:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:05,956 INFO L93 Difference]: Finished difference Result 3635 states and 5877 transitions. [2019-10-13 21:09:05,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:05,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 173 [2019-10-13 21:09:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:05,969 INFO L225 Difference]: With dead ends: 3635 [2019-10-13 21:09:05,969 INFO L226 Difference]: Without dead ends: 1855 [2019-10-13 21:09:05,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2019-10-13 21:09:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1831. [2019-10-13 21:09:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-13 21:09:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-13 21:09:06,044 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 173 [2019-10-13 21:09:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:06,045 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-13 21:09:06,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-13 21:09:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:09:06,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:06,056 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:06,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:06,264 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:06,264 INFO L82 PathProgramCache]: Analyzing trace with hash -718598851, now seen corresponding path program 1 times [2019-10-13 21:09:06,265 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:06,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161333251] [2019-10-13 21:09:06,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:06,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161333251] [2019-10-13 21:09:06,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992607167] [2019-10-13 21:09:06,393 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 21:09:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:07,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:07,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:07,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:07,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:07,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:07,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:07,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559967446] [2019-10-13 21:09:07,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:07,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:07,532 INFO L87 Difference]: Start difference. First operand 1831 states and 2956 transitions. Second operand 9 states. [2019-10-13 21:09:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:07,790 INFO L93 Difference]: Finished difference Result 3636 states and 5881 transitions. [2019-10-13 21:09:07,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:07,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-13 21:09:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:07,806 INFO L225 Difference]: With dead ends: 3636 [2019-10-13 21:09:07,806 INFO L226 Difference]: Without dead ends: 1854 [2019-10-13 21:09:07,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2019-10-13 21:09:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1831. [2019-10-13 21:09:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-13 21:09:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-13 21:09:07,894 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 174 [2019-10-13 21:09:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:07,894 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-13 21:09:07,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-13 21:09:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:07,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:07,900 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:08,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:08,108 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1640133275, now seen corresponding path program 1 times [2019-10-13 21:09:08,109 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:08,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262257557] [2019-10-13 21:09:08,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:08,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262257557] [2019-10-13 21:09:08,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035734133] [2019-10-13 21:09:08,225 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 21:09:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:08,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:08,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:09,072 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:09,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:09,415 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:09,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:09:09,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962658] [2019-10-13 21:09:09,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:09,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:09,417 INFO L87 Difference]: Start difference. First operand 1831 states and 2956 transitions. Second operand 9 states. [2019-10-13 21:09:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:09,652 INFO L93 Difference]: Finished difference Result 3637 states and 5885 transitions. [2019-10-13 21:09:09,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:09,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-13 21:09:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:09,666 INFO L225 Difference]: With dead ends: 3637 [2019-10-13 21:09:09,667 INFO L226 Difference]: Without dead ends: 1855 [2019-10-13 21:09:09,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 337 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2019-10-13 21:09:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1831. [2019-10-13 21:09:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-13 21:09:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-13 21:09:09,746 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 176 [2019-10-13 21:09:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:09,749 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-13 21:09:09,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-13 21:09:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:09,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:09,755 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:09,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:09,963 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:09,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1260907448, now seen corresponding path program 1 times [2019-10-13 21:09:09,963 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:09,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78722056] [2019-10-13 21:09:09,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:09,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:09,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:10,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78722056] [2019-10-13 21:09:10,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537405061] [2019-10-13 21:09:10,083 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 21:09:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 21:09:10,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:09:10,816 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 21:09:11,033 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:11,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 12 [2019-10-13 21:09:11,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18193556] [2019-10-13 21:09:11,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:11,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:11,035 INFO L87 Difference]: Start difference. First operand 1831 states and 2956 transitions. Second operand 7 states. [2019-10-13 21:09:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:12,088 INFO L93 Difference]: Finished difference Result 4166 states and 6740 transitions. [2019-10-13 21:09:12,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:09:12,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2019-10-13 21:09:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:12,106 INFO L225 Difference]: With dead ends: 4166 [2019-10-13 21:09:12,106 INFO L226 Difference]: Without dead ends: 2455 [2019-10-13 21:09:12,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 339 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2019-10-13 21:09:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2449. [2019-10-13 21:09:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2449 states. [2019-10-13 21:09:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3932 transitions. [2019-10-13 21:09:12,214 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3932 transitions. Word has length 176 [2019-10-13 21:09:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:12,214 INFO L462 AbstractCegarLoop]: Abstraction has 2449 states and 3932 transitions. [2019-10-13 21:09:12,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3932 transitions. [2019-10-13 21:09:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:09:12,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:12,222 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:12,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:12,431 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash 314946853, now seen corresponding path program 1 times [2019-10-13 21:09:12,432 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:12,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781493426] [2019-10-13 21:09:12,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:12,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781493426] [2019-10-13 21:09:12,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374707477] [2019-10-13 21:09:12,553 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 21:09:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:09:13,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:13,234 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:13,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:13,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-10-13 21:09:13,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530535281] [2019-10-13 21:09:13,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:13,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:13,445 INFO L87 Difference]: Start difference. First operand 2449 states and 3932 transitions. Second operand 7 states. [2019-10-13 21:09:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:13,610 INFO L93 Difference]: Finished difference Result 4868 states and 7828 transitions. [2019-10-13 21:09:13,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:13,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-10-13 21:09:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:13,625 INFO L225 Difference]: With dead ends: 4868 [2019-10-13 21:09:13,625 INFO L226 Difference]: Without dead ends: 2460 [2019-10-13 21:09:13,635 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2019-10-13 21:09:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2442. [2019-10-13 21:09:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2442 states. [2019-10-13 21:09:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3916 transitions. [2019-10-13 21:09:13,720 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3916 transitions. Word has length 177 [2019-10-13 21:09:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:13,721 INFO L462 AbstractCegarLoop]: Abstraction has 2442 states and 3916 transitions. [2019-10-13 21:09:13,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3916 transitions. [2019-10-13 21:09:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:13,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:13,729 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:13,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:13,932 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1143373351, now seen corresponding path program 1 times [2019-10-13 21:09:13,932 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:13,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184278554] [2019-10-13 21:09:13,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:14,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184278554] [2019-10-13 21:09:14,055 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,055 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:14,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452500594] [2019-10-13 21:09:14,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:14,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:14,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:14,057 INFO L87 Difference]: Start difference. First operand 2442 states and 3916 transitions. Second operand 4 states. [2019-10-13 21:09:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,145 INFO L93 Difference]: Finished difference Result 4820 states and 7756 transitions. [2019-10-13 21:09:14,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:14,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:09:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,171 INFO L225 Difference]: With dead ends: 4820 [2019-10-13 21:09:14,171 INFO L226 Difference]: Without dead ends: 2420 [2019-10-13 21:09:14,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2019-10-13 21:09:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2420. [2019-10-13 21:09:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2420 states. [2019-10-13 21:09:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3878 transitions. [2019-10-13 21:09:14,251 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3878 transitions. Word has length 178 [2019-10-13 21:09:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,252 INFO L462 AbstractCegarLoop]: Abstraction has 2420 states and 3878 transitions. [2019-10-13 21:09:14,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3878 transitions. [2019-10-13 21:09:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:14,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,259 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:14,260 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1375971052, now seen corresponding path program 1 times [2019-10-13 21:09:14,260 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009565338] [2019-10-13 21:09:14,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:14,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009565338] [2019-10-13 21:09:14,393 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:09:14,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66879106] [2019-10-13 21:09:14,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:14,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:14,395 INFO L87 Difference]: Start difference. First operand 2420 states and 3878 transitions. Second operand 7 states.