/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:40:23,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:40:23,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:40:23,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:40:23,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:40:23,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:40:23,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:40:23,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:40:23,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:40:23,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:40:23,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:40:23,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:40:23,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:40:23,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:40:23,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:40:23,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:40:23,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:40:23,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:40:23,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:40:23,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:40:23,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:40:23,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:40:23,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:40:23,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:40:23,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:40:23,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:40:23,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:40:23,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:40:23,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:40:23,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:40:23,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:40:23,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:40:23,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:40:23,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:40:23,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:40:23,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:40:23,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:40:23,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:40:23,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:40:23,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:40:23,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:40:23,605 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 [2019-11-07 00:40:23,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:40:23,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:40:23,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:40:23,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:40:23,622 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:40:23,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:40:23,622 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:40:23,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:40:23,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:40:23,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:40:23,624 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:40:23,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:40:23,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:40:23,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:40:23,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:40:23,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:40:23,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:23,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:40:23,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:40:23,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:40:23,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:40:23,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:40:23,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:40:23,627 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 [2019-11-07 00:40:23,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:40:23,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:40:23,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:40:23,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:40:23,935 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:40:23,936 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-11-07 00:40:24,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e943d546/1ee4ba23643f43bd9a16a2877b4919a8/FLAGb344cefe0 [2019-11-07 00:40:24,685 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:40:24,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-11-07 00:40:24,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e943d546/1ee4ba23643f43bd9a16a2877b4919a8/FLAGb344cefe0 [2019-11-07 00:40:24,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e943d546/1ee4ba23643f43bd9a16a2877b4919a8 [2019-11-07 00:40:24,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:40:24,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:40:24,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:24,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:40:24,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:40:24,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:24" (1/1) ... [2019-11-07 00:40:24,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5910708c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:24, skipping insertion in model container [2019-11-07 00:40:24,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:24" (1/1) ... [2019-11-07 00:40:24,906 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:40:24,990 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:40:25,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:25,700 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:40:25,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:25,924 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:40:25,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25 WrapperNode [2019-11-07 00:40:25,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:25,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:40:25,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:40:25,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:40:25,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:25,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:25,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:25,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:26,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:26,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:26,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (1/1) ... [2019-11-07 00:40:26,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:40:26,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:40:26,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:40:26,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:40:26,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (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 [2019-11-07 00:40:26,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:40:26,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:40:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:40:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:40:26,250 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:40:26,250 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:40:26,251 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:40:26,251 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:40:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:40:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:40:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:40:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:40:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:40:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:40:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:40:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:40:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:40:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:40:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:40:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:40:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:40:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:40:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:40:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 00:40:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:40:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 00:40:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:40:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:40:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:40:26,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:40:26,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:26,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:40:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:40:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:40:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:40:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:40:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:40:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:40:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:40:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:40:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:40:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:40:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:40:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:40:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:40:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:40:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:40:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:40:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:40:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:40:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:40:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:40:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:40:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:40:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:40:26,267 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:40:26,267 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:40:26,268 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:40:26,269 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:40:26,269 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:40:26,269 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:40:26,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:40:26,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:26,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:40:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:40:26,272 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:40:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:40:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:40:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:40:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:40:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:40:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:40:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:40:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:40:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:40:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:40:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:40:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:40:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:40:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:40:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:40:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:40:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:40:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:40:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:40:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:40:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:40:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:40:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:40:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:40:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:40:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:40:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:40:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:40:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:40:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:40:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:40:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 00:40:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 00:40:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:40:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:40:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:40:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:40:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:40:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:40:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:40:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:40:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:40:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:40:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:40:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:40:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:40:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:40:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:40:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:40:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:40:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:40:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:40:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:40:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:40:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:40:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:40:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:28,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:28,759 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:28,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:28 BoogieIcfgContainer [2019-11-07 00:40:28,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:28,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:28,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:28,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:28,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:24" (1/3) ... [2019-11-07 00:40:28,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa1ec0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:28, skipping insertion in model container [2019-11-07 00:40:28,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:25" (2/3) ... [2019-11-07 00:40:28,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa1ec0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:28, skipping insertion in model container [2019-11-07 00:40:28,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:28" (3/3) ... [2019-11-07 00:40:28,769 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2019-11-07 00:40:28,779 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:28,791 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:28,802 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:28,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:28,848 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:28,848 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:28,848 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:28,848 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:28,849 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:28,849 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:28,849 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2019-11-07 00:40:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:40:28,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:28,931 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:28,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 669576515, now seen corresponding path program 1 times [2019-11-07 00:40:28,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:28,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397116273] [2019-11-07 00:40:28,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:29,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397116273] [2019-11-07 00:40:29,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172681301] [2019-11-07 00:40:29,602 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 [2019-11-07 00:40:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:30,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:30,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:30,337 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:30,535 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:30,535 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:30,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404596838] [2019-11-07 00:40:30,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:30,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:30,562 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 2 states. [2019-11-07 00:40:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:30,641 INFO L93 Difference]: Finished difference Result 663 states and 1051 transitions. [2019-11-07 00:40:30,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:30,644 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-11-07 00:40:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:30,693 INFO L225 Difference]: With dead ends: 663 [2019-11-07 00:40:30,693 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:40:30,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:40:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:40:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:40:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 996 transitions. [2019-11-07 00:40:30,836 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 996 transitions. Word has length 116 [2019-11-07 00:40:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:30,842 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 996 transitions. [2019-11-07 00:40:30,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 996 transitions. [2019-11-07 00:40:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:40:30,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:30,853 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:31,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:31,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 835424246, now seen corresponding path program 1 times [2019-11-07 00:40:31,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:31,056 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104996608] [2019-11-07 00:40:31,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:31,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104996608] [2019-11-07 00:40:31,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371457254] [2019-11-07 00:40:31,492 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 [2019-11-07 00:40:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:32,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:32,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:32,198 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:32,459 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:32,459 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:32,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850176140] [2019-11-07 00:40:32,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:32,461 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:32,462 INFO L87 Difference]: Start difference. First operand 626 states and 996 transitions. Second operand 4 states. [2019-11-07 00:40:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:32,562 INFO L93 Difference]: Finished difference Result 1224 states and 1965 transitions. [2019-11-07 00:40:32,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:32,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-07 00:40:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:32,574 INFO L225 Difference]: With dead ends: 1224 [2019-11-07 00:40:32,575 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:40:32,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:40:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:40:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:40:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 995 transitions. [2019-11-07 00:40:32,634 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 995 transitions. Word has length 118 [2019-11-07 00:40:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:32,635 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 995 transitions. [2019-11-07 00:40:32,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 995 transitions. [2019-11-07 00:40:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 00:40:32,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:32,645 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:32,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:32,853 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:32,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash 963635798, now seen corresponding path program 1 times [2019-11-07 00:40:32,853 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:32,853 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881043338] [2019-11-07 00:40:32,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:32,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881043338] [2019-11-07 00:40:32,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132114369] [2019-11-07 00:40:32,998 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 [2019-11-07 00:40:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:33,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:33,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:33,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:33,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:33,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:33,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009513947] [2019-11-07 00:40:33,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:33,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:33,852 INFO L87 Difference]: Start difference. First operand 626 states and 995 transitions. Second operand 4 states. [2019-11-07 00:40:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:33,950 INFO L93 Difference]: Finished difference Result 1224 states and 1963 transitions. [2019-11-07 00:40:33,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:33,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-11-07 00:40:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:33,956 INFO L225 Difference]: With dead ends: 1224 [2019-11-07 00:40:33,956 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:40:33,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:40:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:40:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:40:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 994 transitions. [2019-11-07 00:40:33,985 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 994 transitions. Word has length 120 [2019-11-07 00:40:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:33,986 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 994 transitions. [2019-11-07 00:40:33,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 994 transitions. [2019-11-07 00:40:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:40:33,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:33,988 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:34,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:34,196 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash 684702014, now seen corresponding path program 1 times [2019-11-07 00:40:34,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:34,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963386483] [2019-11-07 00:40:34,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:34,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963386483] [2019-11-07 00:40:34,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648237231] [2019-11-07 00:40:34,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:35,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:35,066 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:35,291 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:35,292 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:35,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066768037] [2019-11-07 00:40:35,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:35,294 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:35,295 INFO L87 Difference]: Start difference. First operand 626 states and 994 transitions. Second operand 4 states. [2019-11-07 00:40:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:35,390 INFO L93 Difference]: Finished difference Result 1231 states and 1970 transitions. [2019-11-07 00:40:35,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:35,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-07 00:40:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:35,396 INFO L225 Difference]: With dead ends: 1231 [2019-11-07 00:40:35,397 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:40:35,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:40:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-11-07 00:40:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:40:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1006 transitions. [2019-11-07 00:40:35,432 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1006 transitions. Word has length 122 [2019-11-07 00:40:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:35,432 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1006 transitions. [2019-11-07 00:40:35,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1006 transitions. [2019-11-07 00:40:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:40:35,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:35,436 INFO L410 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] [2019-11-07 00:40:35,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:35,643 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1568855861, now seen corresponding path program 1 times [2019-11-07 00:40:35,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:35,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372237036] [2019-11-07 00:40:35,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:35,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372237036] [2019-11-07 00:40:35,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776343615] [2019-11-07 00:40:35,863 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 [2019-11-07 00:40:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:36,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:36,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:36,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:36,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:36,659 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:36,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024666864] [2019-11-07 00:40:36,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:36,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:36,662 INFO L87 Difference]: Start difference. First operand 635 states and 1006 transitions. Second operand 4 states. [2019-11-07 00:40:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:36,801 INFO L93 Difference]: Finished difference Result 1233 states and 1971 transitions. [2019-11-07 00:40:36,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:36,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-07 00:40:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:36,807 INFO L225 Difference]: With dead ends: 1233 [2019-11-07 00:40:36,807 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:40:36,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:40:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-11-07 00:40:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:40:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1005 transitions. [2019-11-07 00:40:36,832 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1005 transitions. Word has length 123 [2019-11-07 00:40:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:36,833 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1005 transitions. [2019-11-07 00:40:36,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1005 transitions. [2019-11-07 00:40:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:40:36,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:36,835 INFO L410 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] [2019-11-07 00:40:37,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:37,043 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash 43826914, now seen corresponding path program 1 times [2019-11-07 00:40:37,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:37,045 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370263568] [2019-11-07 00:40:37,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:37,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370263568] [2019-11-07 00:40:37,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912823859] [2019-11-07 00:40:37,146 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 [2019-11-07 00:40:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:37,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:37,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:37,793 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:38,003 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:38,003 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059263600] [2019-11-07 00:40:38,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:38,005 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:38,006 INFO L87 Difference]: Start difference. First operand 635 states and 1005 transitions. Second operand 4 states. [2019-11-07 00:40:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:38,108 INFO L93 Difference]: Finished difference Result 1233 states and 1970 transitions. [2019-11-07 00:40:38,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:38,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-07 00:40:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:38,116 INFO L225 Difference]: With dead ends: 1233 [2019-11-07 00:40:38,116 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:40:38,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:40:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-11-07 00:40:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:40:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1004 transitions. [2019-11-07 00:40:38,151 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1004 transitions. Word has length 124 [2019-11-07 00:40:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:38,151 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1004 transitions. [2019-11-07 00:40:38,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1004 transitions. [2019-11-07 00:40:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:40:38,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:38,155 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:38,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:38,364 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1250885551, now seen corresponding path program 1 times [2019-11-07 00:40:38,365 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:38,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517197644] [2019-11-07 00:40:38,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:38,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517197644] [2019-11-07 00:40:38,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036905000] [2019-11-07 00:40:38,702 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 [2019-11-07 00:40:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:39,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:39,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:39,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:39,685 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:39,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-11-07 00:40:39,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044391747] [2019-11-07 00:40:39,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:39,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:39,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:39,687 INFO L87 Difference]: Start difference. First operand 635 states and 1004 transitions. Second operand 7 states. [2019-11-07 00:40:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:39,831 INFO L93 Difference]: Finished difference Result 1240 states and 1979 transitions. [2019-11-07 00:40:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:39,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-11-07 00:40:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:39,838 INFO L225 Difference]: With dead ends: 1240 [2019-11-07 00:40:39,838 INFO L226 Difference]: Without dead ends: 646 [2019-11-07 00:40:39,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:40:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-11-07 00:40:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 642. [2019-11-07 00:40:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:40:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1014 transitions. [2019-11-07 00:40:39,870 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1014 transitions. Word has length 125 [2019-11-07 00:40:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:39,871 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1014 transitions. [2019-11-07 00:40:39,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1014 transitions. [2019-11-07 00:40:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:40:39,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:39,874 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:40,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:40,081 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash 865518768, now seen corresponding path program 1 times [2019-11-07 00:40:40,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:40,082 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708839613] [2019-11-07 00:40:40,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:40,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708839613] [2019-11-07 00:40:40,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901192681] [2019-11-07 00:40:40,185 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 [2019-11-07 00:40:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:40,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:40,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:40,897 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:41,082 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:41,082 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:41,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626771698] [2019-11-07 00:40:41,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:41,083 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:41,084 INFO L87 Difference]: Start difference. First operand 642 states and 1014 transitions. Second operand 4 states. [2019-11-07 00:40:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:41,266 INFO L93 Difference]: Finished difference Result 1245 states and 1990 transitions. [2019-11-07 00:40:41,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:41,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-11-07 00:40:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:41,281 INFO L225 Difference]: With dead ends: 1245 [2019-11-07 00:40:41,281 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:40:41,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:40:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:40:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:40:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1009 transitions. [2019-11-07 00:40:41,311 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1009 transitions. Word has length 125 [2019-11-07 00:40:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:41,311 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1009 transitions. [2019-11-07 00:40:41,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1009 transitions. [2019-11-07 00:40:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-07 00:40:41,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:41,314 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:41,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:41,522 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash -162638701, now seen corresponding path program 1 times [2019-11-07 00:40:41,523 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:41,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543176693] [2019-11-07 00:40:41,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:41,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543176693] [2019-11-07 00:40:41,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615833762] [2019-11-07 00:40:41,667 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 [2019-11-07 00:40:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:42,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:42,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:42,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:42,623 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:42,623 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:42,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970669135] [2019-11-07 00:40:42,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:42,624 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:42,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:42,625 INFO L87 Difference]: Start difference. First operand 642 states and 1009 transitions. Second operand 4 states. [2019-11-07 00:40:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:42,799 INFO L93 Difference]: Finished difference Result 1245 states and 1980 transitions. [2019-11-07 00:40:42,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:42,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-11-07 00:40:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:42,805 INFO L225 Difference]: With dead ends: 1245 [2019-11-07 00:40:42,805 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:40:42,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:40:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:40:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:40:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1004 transitions. [2019-11-07 00:40:42,833 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1004 transitions. Word has length 128 [2019-11-07 00:40:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:42,833 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1004 transitions. [2019-11-07 00:40:42,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1004 transitions. [2019-11-07 00:40:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:40:42,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:42,836 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:43,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:43,044 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2001392257, now seen corresponding path program 1 times [2019-11-07 00:40:43,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:43,045 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910868020] [2019-11-07 00:40:43,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:43,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910868020] [2019-11-07 00:40:43,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985262359] [2019-11-07 00:40:43,181 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 [2019-11-07 00:40:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:43,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:43,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:43,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:44,124 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:44,124 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:44,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57534965] [2019-11-07 00:40:44,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:44,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:44,127 INFO L87 Difference]: Start difference. First operand 642 states and 1004 transitions. Second operand 4 states. [2019-11-07 00:40:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:44,329 INFO L93 Difference]: Finished difference Result 1281 states and 2028 transitions. [2019-11-07 00:40:44,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:44,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-11-07 00:40:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:44,335 INFO L225 Difference]: With dead ends: 1281 [2019-11-07 00:40:44,335 INFO L226 Difference]: Without dead ends: 684 [2019-11-07 00:40:44,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-11-07 00:40:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2019-11-07 00:40:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-11-07 00:40:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1067 transitions. [2019-11-07 00:40:44,373 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1067 transitions. Word has length 130 [2019-11-07 00:40:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:44,374 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1067 transitions. [2019-11-07 00:40:44,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1067 transitions. [2019-11-07 00:40:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:40:44,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:44,377 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:44,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:44,585 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1601209857, now seen corresponding path program 1 times [2019-11-07 00:40:44,586 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:44,586 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946679751] [2019-11-07 00:40:44,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:44,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946679751] [2019-11-07 00:40:44,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119051694] [2019-11-07 00:40:44,724 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 [2019-11-07 00:40:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:45,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:45,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:45,496 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:45,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:45,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:45,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:45,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246420067] [2019-11-07 00:40:45,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:45,933 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:45,934 INFO L87 Difference]: Start difference. First operand 681 states and 1067 transitions. Second operand 9 states. [2019-11-07 00:40:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:46,178 INFO L93 Difference]: Finished difference Result 1286 states and 2033 transitions. [2019-11-07 00:40:46,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:46,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-11-07 00:40:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:46,186 INFO L225 Difference]: With dead ends: 1286 [2019-11-07 00:40:46,186 INFO L226 Difference]: Without dead ends: 692 [2019-11-07 00:40:46,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-11-07 00:40:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2019-11-07 00:40:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-11-07 00:40:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1071 transitions. [2019-11-07 00:40:46,229 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1071 transitions. Word has length 130 [2019-11-07 00:40:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:46,230 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1071 transitions. [2019-11-07 00:40:46,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1071 transitions. [2019-11-07 00:40:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:40:46,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:46,235 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:46,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:46,438 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 791722400, now seen corresponding path program 1 times [2019-11-07 00:40:46,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:46,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667553884] [2019-11-07 00:40:46,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:46,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667553884] [2019-11-07 00:40:46,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212607547] [2019-11-07 00:40:46,639 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 [2019-11-07 00:40:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:47,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:47,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:47,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:47,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:47,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:47,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851472152] [2019-11-07 00:40:47,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:47,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:47,752 INFO L87 Difference]: Start difference. First operand 683 states and 1071 transitions. Second operand 11 states. [2019-11-07 00:40:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:47,897 INFO L93 Difference]: Finished difference Result 1222 states and 1933 transitions. [2019-11-07 00:40:47,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:47,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-11-07 00:40:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:47,902 INFO L225 Difference]: With dead ends: 1222 [2019-11-07 00:40:47,903 INFO L226 Difference]: Without dead ends: 700 [2019-11-07 00:40:47,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-07 00:40:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2019-11-07 00:40:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-11-07 00:40:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1081 transitions. [2019-11-07 00:40:47,939 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1081 transitions. Word has length 130 [2019-11-07 00:40:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:47,942 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1081 transitions. [2019-11-07 00:40:47,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1081 transitions. [2019-11-07 00:40:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:40:47,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:47,946 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:48,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:48,155 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash -897013069, now seen corresponding path program 1 times [2019-11-07 00:40:48,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:48,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679494388] [2019-11-07 00:40:48,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:48,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679494388] [2019-11-07 00:40:48,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778634450] [2019-11-07 00:40:48,254 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 [2019-11-07 00:40:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:48,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:48,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:49,083 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:49,253 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:49,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:49,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188558235] [2019-11-07 00:40:49,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:49,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:49,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:49,256 INFO L87 Difference]: Start difference. First operand 690 states and 1081 transitions. Second operand 4 states. [2019-11-07 00:40:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:49,431 INFO L93 Difference]: Finished difference Result 1299 states and 2054 transitions. [2019-11-07 00:40:49,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:49,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-11-07 00:40:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:49,436 INFO L225 Difference]: With dead ends: 1299 [2019-11-07 00:40:49,436 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:40:49,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:40:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-11-07 00:40:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-11-07 00:40:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-11-07 00:40:49,464 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 131 [2019-11-07 00:40:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:49,464 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-11-07 00:40:49,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-11-07 00:40:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:40:49,467 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:49,467 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:49,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:49,676 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -257623020, now seen corresponding path program 1 times [2019-11-07 00:40:49,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:49,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824866290] [2019-11-07 00:40:49,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:49,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824866290] [2019-11-07 00:40:49,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611471941] [2019-11-07 00:40:49,767 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 [2019-11-07 00:40:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:50,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:50,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:50,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:50,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:50,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:40:50,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105164500] [2019-11-07 00:40:50,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:40:50,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:40:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:50,961 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 8 states. [2019-11-07 00:40:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:51,074 INFO L93 Difference]: Finished difference Result 1226 states and 1937 transitions. [2019-11-07 00:40:51,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:51,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-11-07 00:40:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:51,083 INFO L225 Difference]: With dead ends: 1226 [2019-11-07 00:40:51,083 INFO L226 Difference]: Without dead ends: 704 [2019-11-07 00:40:51,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-11-07 00:40:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2019-11-07 00:40:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-07 00:40:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1087 transitions. [2019-11-07 00:40:51,121 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1087 transitions. Word has length 131 [2019-11-07 00:40:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:51,122 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1087 transitions. [2019-11-07 00:40:51,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:40:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1087 transitions. [2019-11-07 00:40:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-07 00:40:51,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:51,124 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:51,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:51,333 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash -63351501, now seen corresponding path program 1 times [2019-11-07 00:40:51,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:51,334 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911380372] [2019-11-07 00:40:51,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:51,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911380372] [2019-11-07 00:40:51,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64814863] [2019-11-07 00:40:51,420 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 [2019-11-07 00:40:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:52,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:52,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:52,196 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:52,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:52,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:52,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497417823] [2019-11-07 00:40:52,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:52,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:52,397 INFO L87 Difference]: Start difference. First operand 697 states and 1087 transitions. Second operand 4 states. [2019-11-07 00:40:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:52,613 INFO L93 Difference]: Finished difference Result 1313 states and 2071 transitions. [2019-11-07 00:40:52,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:52,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-11-07 00:40:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:52,620 INFO L225 Difference]: With dead ends: 1313 [2019-11-07 00:40:52,620 INFO L226 Difference]: Without dead ends: 697 [2019-11-07 00:40:52,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-11-07 00:40:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2019-11-07 00:40:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-07 00:40:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-11-07 00:40:52,655 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 132 [2019-11-07 00:40:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:52,655 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-11-07 00:40:52,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-11-07 00:40:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:40:52,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:52,660 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:52,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:52,880 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash -346652232, now seen corresponding path program 1 times [2019-11-07 00:40:52,880 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:52,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231864168] [2019-11-07 00:40:52,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:53,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231864168] [2019-11-07 00:40:53,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061538855] [2019-11-07 00:40:53,009 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 [2019-11-07 00:40:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:53,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:53,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:53,914 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:54,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:54,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:54,399 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668636077] [2019-11-07 00:40:54,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:54,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:54,400 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 14 states. [2019-11-07 00:40:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:54,721 INFO L93 Difference]: Finished difference Result 1227 states and 1932 transitions. [2019-11-07 00:40:54,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:40:54,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-11-07 00:40:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:54,732 INFO L225 Difference]: With dead ends: 1227 [2019-11-07 00:40:54,733 INFO L226 Difference]: Without dead ends: 705 [2019-11-07 00:40:54,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-11-07 00:40:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 697. [2019-11-07 00:40:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-07 00:40:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-11-07 00:40:54,768 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 133 [2019-11-07 00:40:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:54,768 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-11-07 00:40:54,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:40:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-11-07 00:40:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-07 00:40:54,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:54,771 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:54,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:54,978 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1310949591, now seen corresponding path program 1 times [2019-11-07 00:40:54,979 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:54,979 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93282353] [2019-11-07 00:40:54,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:55,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93282353] [2019-11-07 00:40:55,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020560371] [2019-11-07 00:40:55,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 00:40:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:55,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:55,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:55,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:56,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:56,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:56,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:40:56,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759304526] [2019-11-07 00:40:56,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:56,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:56,359 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 11 states. [2019-11-07 00:40:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:56,554 INFO L93 Difference]: Finished difference Result 1228 states and 1940 transitions. [2019-11-07 00:40:56,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:56,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-11-07 00:40:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:56,559 INFO L225 Difference]: With dead ends: 1228 [2019-11-07 00:40:56,560 INFO L226 Difference]: Without dead ends: 706 [2019-11-07 00:40:56,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-11-07 00:40:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 699. [2019-11-07 00:40:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-11-07 00:40:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1088 transitions. [2019-11-07 00:40:56,586 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1088 transitions. Word has length 134 [2019-11-07 00:40:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:56,587 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 1088 transitions. [2019-11-07 00:40:56,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1088 transitions. [2019-11-07 00:40:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:40:56,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:56,591 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:56,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:56,808 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 919812815, now seen corresponding path program 1 times [2019-11-07 00:40:56,809 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:56,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065715067] [2019-11-07 00:40:56,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:56,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065715067] [2019-11-07 00:40:56,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533421546] [2019-11-07 00:40:56,889 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 [2019-11-07 00:40:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:57,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:57,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:57,779 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:57,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:58,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:58,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:40:58,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048772944] [2019-11-07 00:40:58,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:58,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:58,043 INFO L87 Difference]: Start difference. First operand 699 states and 1088 transitions. Second operand 9 states. [2019-11-07 00:40:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:58,166 INFO L93 Difference]: Finished difference Result 1324 states and 2105 transitions. [2019-11-07 00:40:58,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:58,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-11-07 00:40:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:58,171 INFO L225 Difference]: With dead ends: 1324 [2019-11-07 00:40:58,171 INFO L226 Difference]: Without dead ends: 708 [2019-11-07 00:40:58,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2019-11-07 00:40:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2019-11-07 00:40:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-07 00:40:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1096 transitions. [2019-11-07 00:40:58,197 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1096 transitions. Word has length 133 [2019-11-07 00:40:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:58,197 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1096 transitions. [2019-11-07 00:40:58,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1096 transitions. [2019-11-07 00:40:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:40:58,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:58,200 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:58,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:58,408 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1282992091, now seen corresponding path program 1 times [2019-11-07 00:40:58,409 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:58,409 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428182133] [2019-11-07 00:40:58,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:58,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428182133] [2019-11-07 00:40:58,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522503660] [2019-11-07 00:40:58,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:59,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:59,263 INFO L279 TraceCheckSpWp]: Computing forward predicates...