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_spec3_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:11:33,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:11:33,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:11:33,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:11:33,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:11:33,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:11:33,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:11:33,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:11:33,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:11:33,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:11:33,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:11:33,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:11:33,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:11:33,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:11:33,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:11:33,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:11:33,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:11:33,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:11:33,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:11:33,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:11:33,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:11:33,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:11:33,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:11:33,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:11:33,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:11:33,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:11:33,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:11:33,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:11:33,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:11:33,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:11:33,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:11:33,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:11:33,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:11:33,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:11:33,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:11:33,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:11:33,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:11:33,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:11:33,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:11:33,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:11:33,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:11:33,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:11:33,499 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:11:33,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:11:33,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:11:33,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:11:33,501 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:11:33,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:11:33,502 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:11:33,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:11:33,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:11:33,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:11:33,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:11:33,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:11:33,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:11:33,505 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:11:33,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:11:33,506 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:11:33,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:11:33,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:11:33,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:11:33,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:11:33,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:11:33,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:33,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:11:33,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:11:33,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:11:33,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:11:33,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:11:33,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:11:33,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:11:33,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:11:33,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:11:33,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:11:33,813 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:11:33,813 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:11:33,814 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-13 21:11:33,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cbe45b3f/41f307cc51324726a716faad9684571f/FLAGc8239cbf5 [2019-10-13 21:11:34,563 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:11:34,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-13 21:11:34,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cbe45b3f/41f307cc51324726a716faad9684571f/FLAGc8239cbf5 [2019-10-13 21:11:34,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cbe45b3f/41f307cc51324726a716faad9684571f [2019-10-13 21:11:34,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:11:34,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:11:34,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:34,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:11:34,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:11:34,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ff5150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:34, skipping insertion in model container [2019-10-13 21:11:34,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:34" (1/1) ... [2019-10-13 21:11:34,895 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:11:34,975 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:11:35,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:35,783 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:11:35,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:35,963 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:11:35,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35 WrapperNode [2019-10-13 21:11:35,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:35,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:11:35,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:11:35,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:11:35,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:35,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... [2019-10-13 21:11:36,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:11:36,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:11:36,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:11:36,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:11:36,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:36,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:11:36,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:11:36,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:36,283 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:11:36,284 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:11:36,284 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:11:36,285 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:11:36,285 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:11:36,285 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:11:36,286 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:11:36,286 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:11:36,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:11:36,286 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:11:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:11:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:11:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:11:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:11:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:11:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:11:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:11:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:11:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:11:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:11:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:11:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:11:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:11:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:11:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:11:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:11:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:11:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:11:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:11:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:11:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:11:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:11:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:11:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:11:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:11:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:11:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:11:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:11:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:11:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:11:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:11:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:11:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:11:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:11:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:11:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:11:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:11:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:11:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:11:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:11:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:11:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:11:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:11:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:11:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:11:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:11:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:11:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:11:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:11:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:11:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:11:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:11:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:11:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:11:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:11:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:11:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:11:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:11:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:11:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:11:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:11:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:11:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:11:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:11:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:11:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:11:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:11:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:11:38,559 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:11:38,559 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:11:38,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:38 BoogieIcfgContainer [2019-10-13 21:11:38,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:11:38,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:11:38,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:11:38,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:11:38,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:11:34" (1/3) ... [2019-10-13 21:11:38,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8a5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:38, skipping insertion in model container [2019-10-13 21:11:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:35" (2/3) ... [2019-10-13 21:11:38,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8a5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:38, skipping insertion in model container [2019-10-13 21:11:38,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:38" (3/3) ... [2019-10-13 21:11:38,574 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2019-10-13 21:11:38,585 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:11:38,600 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:11:38,613 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:11:38,661 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:11:38,662 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:11:38,662 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:11:38,662 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:11:38,662 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:11:38,662 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:11:38,662 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:11:38,662 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:11:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states. [2019-10-13 21:11:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:11:38,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:38,748 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:38,751 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash -713058684, now seen corresponding path program 1 times [2019-10-13 21:11:38,768 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013915861] [2019-10-13 21:11:38,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:39,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013915861] [2019-10-13 21:11:39,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:39,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:39,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166846396] [2019-10-13 21:11:39,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:39,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:39,609 INFO L87 Difference]: Start difference. First operand 793 states. Second operand 7 states. [2019-10-13 21:11:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:39,875 INFO L93 Difference]: Finished difference Result 1265 states and 2048 transitions. [2019-10-13 21:11:39,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:39,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2019-10-13 21:11:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:39,918 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 21:11:39,918 INFO L226 Difference]: Without dead ends: 641 [2019-10-13 21:11:39,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2019-10-13 21:11:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2019-10-13 21:11:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-13 21:11:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1019 transitions. [2019-10-13 21:11:40,109 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1019 transitions. Word has length 132 [2019-10-13 21:11:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,110 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 1019 transitions. [2019-10-13 21:11:40,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1019 transitions. [2019-10-13 21:11:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:11:40,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,135 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,138 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2033776308, now seen corresponding path program 1 times [2019-10-13 21:11:40,139 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930710289] [2019-10-13 21:11:40,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:40,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930710289] [2019-10-13 21:11:40,345 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:40,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303157916] [2019-10-13 21:11:40,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:40,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:40,348 INFO L87 Difference]: Start difference. First operand 639 states and 1019 transitions. Second operand 4 states. [2019-10-13 21:11:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:40,456 INFO L93 Difference]: Finished difference Result 1244 states and 2003 transitions. [2019-10-13 21:11:40,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:40,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 21:11:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:40,463 INFO L225 Difference]: With dead ends: 1244 [2019-10-13 21:11:40,463 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:11:40,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:11:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:11:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:11:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 986 transitions. [2019-10-13 21:11:40,495 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 986 transitions. Word has length 133 [2019-10-13 21:11:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,495 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 986 transitions. [2019-10-13 21:11:40,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 986 transitions. [2019-10-13 21:11:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:11:40,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,501 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,501 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1652657134, now seen corresponding path program 1 times [2019-10-13 21:11:40,502 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093028573] [2019-10-13 21:11:40,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:40,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093028573] [2019-10-13 21:11:40,706 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:40,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:40,706 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534936355] [2019-10-13 21:11:40,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:40,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:40,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:40,708 INFO L87 Difference]: Start difference. First operand 621 states and 986 transitions. Second operand 7 states. [2019-10-13 21:11:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:40,806 INFO L93 Difference]: Finished difference Result 1213 states and 1945 transitions. [2019-10-13 21:11:40,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:40,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2019-10-13 21:11:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:40,812 INFO L225 Difference]: With dead ends: 1213 [2019-10-13 21:11:40,812 INFO L226 Difference]: Without dead ends: 615 [2019-10-13 21:11:40,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-13 21:11:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-10-13 21:11:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-10-13 21:11:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 973 transitions. [2019-10-13 21:11:40,841 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 973 transitions. Word has length 133 [2019-10-13 21:11:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:40,841 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 973 transitions. [2019-10-13 21:11:40,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 973 transitions. [2019-10-13 21:11:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:11:40,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:40,846 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:40,846 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1402803232, now seen corresponding path program 1 times [2019-10-13 21:11:40,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:40,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711298403] [2019-10-13 21:11:40,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:40,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:41,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711298403] [2019-10-13 21:11:41,035 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:41,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:41,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16890791] [2019-10-13 21:11:41,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:41,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:41,038 INFO L87 Difference]: Start difference. First operand 615 states and 973 transitions. Second operand 7 states. [2019-10-13 21:11:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,155 INFO L93 Difference]: Finished difference Result 1201 states and 1919 transitions. [2019-10-13 21:11:41,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:41,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2019-10-13 21:11:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,164 INFO L225 Difference]: With dead ends: 1201 [2019-10-13 21:11:41,164 INFO L226 Difference]: Without dead ends: 609 [2019-10-13 21:11:41,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-13 21:11:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-13 21:11:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-13 21:11:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 960 transitions. [2019-10-13 21:11:41,252 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 960 transitions. Word has length 134 [2019-10-13 21:11:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,253 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 960 transitions. [2019-10-13 21:11:41,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 960 transitions. [2019-10-13 21:11:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:11:41,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,261 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,261 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1674666634, now seen corresponding path program 1 times [2019-10-13 21:11:41,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083923330] [2019-10-13 21:11:41,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:41,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083923330] [2019-10-13 21:11:41,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:41,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:41,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514106424] [2019-10-13 21:11:41,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:41,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:41,435 INFO L87 Difference]: Start difference. First operand 609 states and 960 transitions. Second operand 7 states. [2019-10-13 21:11:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,530 INFO L93 Difference]: Finished difference Result 1189 states and 1893 transitions. [2019-10-13 21:11:41,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:41,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2019-10-13 21:11:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,536 INFO L225 Difference]: With dead ends: 1189 [2019-10-13 21:11:41,536 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:41,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 947 transitions. [2019-10-13 21:11:41,564 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 947 transitions. Word has length 135 [2019-10-13 21:11:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,565 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 947 transitions. [2019-10-13 21:11:41,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 947 transitions. [2019-10-13 21:11:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:11:41,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,570 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,571 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1533378921, now seen corresponding path program 1 times [2019-10-13 21:11:41,571 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639385206] [2019-10-13 21:11:41,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:41,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639385206] [2019-10-13 21:11:41,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:41,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:41,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002331200] [2019-10-13 21:11:41,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:41,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:41,733 INFO L87 Difference]: Start difference. First operand 603 states and 947 transitions. Second operand 7 states. [2019-10-13 21:11:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:41,823 INFO L93 Difference]: Finished difference Result 1177 states and 1867 transitions. [2019-10-13 21:11:41,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:41,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2019-10-13 21:11:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:41,839 INFO L225 Difference]: With dead ends: 1177 [2019-10-13 21:11:41,839 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:41,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 946 transitions. [2019-10-13 21:11:41,880 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 946 transitions. Word has length 135 [2019-10-13 21:11:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:41,880 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 946 transitions. [2019-10-13 21:11:41,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 946 transitions. [2019-10-13 21:11:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:11:41,885 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:41,885 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:41,886 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 939897276, now seen corresponding path program 1 times [2019-10-13 21:11:41,887 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:41,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304841530] [2019-10-13 21:11:41,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:41,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:42,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304841530] [2019-10-13 21:11:42,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:42,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:42,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109848141] [2019-10-13 21:11:42,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:42,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:42,168 INFO L87 Difference]: Start difference. First operand 603 states and 946 transitions. Second operand 5 states. [2019-10-13 21:11:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:42,241 INFO L93 Difference]: Finished difference Result 1176 states and 1864 transitions. [2019-10-13 21:11:42,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:42,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2019-10-13 21:11:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:42,246 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:11:42,247 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:42,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 945 transitions. [2019-10-13 21:11:42,277 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 945 transitions. Word has length 136 [2019-10-13 21:11:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:42,277 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 945 transitions. [2019-10-13 21:11:42,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 945 transitions. [2019-10-13 21:11:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:11:42,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:42,283 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:42,284 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:42,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1962554060, now seen corresponding path program 1 times [2019-10-13 21:11:42,285 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:42,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657651537] [2019-10-13 21:11:42,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:42,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657651537] [2019-10-13 21:11:42,436 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:42,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:42,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885296340] [2019-10-13 21:11:42,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:42,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:42,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:42,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:42,438 INFO L87 Difference]: Start difference. First operand 603 states and 945 transitions. Second operand 5 states. [2019-10-13 21:11:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:42,510 INFO L93 Difference]: Finished difference Result 1176 states and 1862 transitions. [2019-10-13 21:11:42,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:42,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-13 21:11:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:42,516 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:11:42,516 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:42,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 944 transitions. [2019-10-13 21:11:42,552 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 944 transitions. Word has length 137 [2019-10-13 21:11:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:42,552 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 944 transitions. [2019-10-13 21:11:42,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 944 transitions. [2019-10-13 21:11:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:11:42,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:42,557 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:42,557 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1062439167, now seen corresponding path program 1 times [2019-10-13 21:11:42,558 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:42,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763398140] [2019-10-13 21:11:42,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:42,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763398140] [2019-10-13 21:11:42,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:42,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:42,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743247657] [2019-10-13 21:11:42,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:42,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:42,716 INFO L87 Difference]: Start difference. First operand 603 states and 944 transitions. Second operand 5 states. [2019-10-13 21:11:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:42,788 INFO L93 Difference]: Finished difference Result 1176 states and 1860 transitions. [2019-10-13 21:11:42,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:42,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2019-10-13 21:11:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:42,796 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:11:42,797 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:42,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 943 transitions. [2019-10-13 21:11:42,824 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 943 transitions. Word has length 138 [2019-10-13 21:11:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:42,824 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 943 transitions. [2019-10-13 21:11:42,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 943 transitions. [2019-10-13 21:11:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 21:11:42,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:42,830 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:42,831 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1753111833, now seen corresponding path program 1 times [2019-10-13 21:11:42,831 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:42,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135729455] [2019-10-13 21:11:42,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:42,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:43,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135729455] [2019-10-13 21:11:43,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:43,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:11:43,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251732707] [2019-10-13 21:11:43,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:43,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:43,035 INFO L87 Difference]: Start difference. First operand 603 states and 943 transitions. Second operand 5 states. [2019-10-13 21:11:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:43,107 INFO L93 Difference]: Finished difference Result 1176 states and 1858 transitions. [2019-10-13 21:11:43,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:43,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-13 21:11:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:43,113 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:11:43,113 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:11:43,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:11:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:11:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:11:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 942 transitions. [2019-10-13 21:11:43,147 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 942 transitions. Word has length 139 [2019-10-13 21:11:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:43,147 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 942 transitions. [2019-10-13 21:11:43,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 942 transitions. [2019-10-13 21:11:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:11:43,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:43,152 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:43,152 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash -477327290, now seen corresponding path program 1 times [2019-10-13 21:11:43,152 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:43,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167642813] [2019-10-13 21:11:43,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:11:43,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167642813] [2019-10-13 21:11:43,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299934016] [2019-10-13 21:11:43,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:44,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:11:44,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:44,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:44,370 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:44,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:11:44,371 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419887153] [2019-10-13 21:11:44,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:44,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:44,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:44,374 INFO L87 Difference]: Start difference. First operand 603 states and 942 transitions. Second operand 3 states. [2019-10-13 21:11:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:44,462 INFO L93 Difference]: Finished difference Result 1688 states and 2686 transitions. [2019-10-13 21:11:44,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:44,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-13 21:11:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:44,472 INFO L225 Difference]: With dead ends: 1688 [2019-10-13 21:11:44,473 INFO L226 Difference]: Without dead ends: 1119 [2019-10-13 21:11:44,477 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2019-10-13 21:11:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1106. [2019-10-13 21:11:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2019-10-13 21:11:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1747 transitions. [2019-10-13 21:11:44,547 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1747 transitions. Word has length 140 [2019-10-13 21:11:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:44,548 INFO L462 AbstractCegarLoop]: Abstraction has 1106 states and 1747 transitions. [2019-10-13 21:11:44,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1747 transitions. [2019-10-13 21:11:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 21:11:44,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:44,555 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:44,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:44,762 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1124187117, now seen corresponding path program 1 times [2019-10-13 21:11:44,763 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:44,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506784616] [2019-10-13 21:11:44,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:44,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:44,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:11:44,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506784616] [2019-10-13 21:11:44,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274325537] [2019-10-13 21:11:44,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:45,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:11:45,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:45,722 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:11:45,867 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:45,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:11:45,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769292880] [2019-10-13 21:11:45,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:45,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:45,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:45,869 INFO L87 Difference]: Start difference. First operand 1106 states and 1747 transitions. Second operand 3 states. [2019-10-13 21:11:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:45,970 INFO L93 Difference]: Finished difference Result 2694 states and 4298 transitions. [2019-10-13 21:11:45,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:45,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-13 21:11:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:45,984 INFO L225 Difference]: With dead ends: 2694 [2019-10-13 21:11:45,984 INFO L226 Difference]: Without dead ends: 1622 [2019-10-13 21:11:45,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2019-10-13 21:11:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1573. [2019-10-13 21:11:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2019-10-13 21:11:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2505 transitions. [2019-10-13 21:11:46,071 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2505 transitions. Word has length 141 [2019-10-13 21:11:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:46,072 INFO L462 AbstractCegarLoop]: Abstraction has 1573 states and 2505 transitions. [2019-10-13 21:11:46,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2505 transitions. [2019-10-13 21:11:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:11:46,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:46,081 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:46,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:46,296 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 925611022, now seen corresponding path program 1 times [2019-10-13 21:11:46,297 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:46,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049382117] [2019-10-13 21:11:46,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:46,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:46,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:11:46,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049382117] [2019-10-13 21:11:46,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005121654] [2019-10-13 21:11:46,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:47,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:11:47,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:11:47,081 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:11:47,229 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:47,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-13 21:11:47,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385127500] [2019-10-13 21:11:47,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:47,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:47,234 INFO L87 Difference]: Start difference. First operand 1573 states and 2505 transitions. Second operand 5 states. [2019-10-13 21:11:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:49,613 INFO L93 Difference]: Finished difference Result 7246 states and 11761 transitions. [2019-10-13 21:11:49,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:11:49,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-13 21:11:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:49,681 INFO L225 Difference]: With dead ends: 7246 [2019-10-13 21:11:49,681 INFO L226 Difference]: Without dead ends: 5707 [2019-10-13 21:11:49,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2019-10-13 21:11:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5587. [2019-10-13 21:11:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2019-10-13 21:11:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 8898 transitions. [2019-10-13 21:11:50,145 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 8898 transitions. Word has length 143 [2019-10-13 21:11:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:50,148 INFO L462 AbstractCegarLoop]: Abstraction has 5587 states and 8898 transitions. [2019-10-13 21:11:50,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 8898 transitions. [2019-10-13 21:11:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 21:11:50,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:50,158 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:50,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:50,370 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash 460377240, now seen corresponding path program 1 times [2019-10-13 21:11:50,370 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:50,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207656514] [2019-10-13 21:11:50,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:50,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:50,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:11:50,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207656514] [2019-10-13 21:11:50,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119825361] [2019-10-13 21:11:50,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:51,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:11:51,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:11:51,142 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:11:51,312 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:51,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-13 21:11:51,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682444804] [2019-10-13 21:11:51,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:51,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:51,314 INFO L87 Difference]: Start difference. First operand 5587 states and 8898 transitions. Second operand 3 states. [2019-10-13 21:11:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:51,735 INFO L93 Difference]: Finished difference Result 15516 states and 24989 transitions. [2019-10-13 21:11:51,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:51,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-10-13 21:11:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:51,852 INFO L225 Difference]: With dead ends: 15516 [2019-10-13 21:11:51,852 INFO L226 Difference]: Without dead ends: 10004 [2019-10-13 21:11:51,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10004 states. [2019-10-13 21:11:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10004 to 9901. [2019-10-13 21:11:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9901 states. [2019-10-13 21:11:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 15813 transitions. [2019-10-13 21:11:52,457 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 15813 transitions. Word has length 148 [2019-10-13 21:11:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:52,458 INFO L462 AbstractCegarLoop]: Abstraction has 9901 states and 15813 transitions. [2019-10-13 21:11:52,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:11:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 15813 transitions. [2019-10-13 21:11:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:11:52,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:52,469 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:52,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:52,673 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 809241675, now seen corresponding path program 1 times [2019-10-13 21:11:52,674 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:52,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295921349] [2019-10-13 21:11:52,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:52,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:52,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:11:52,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295921349] [2019-10-13 21:11:52,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161090496] [2019-10-13 21:11:52,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:53,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:11:53,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 21:11:53,658 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:54,313 WARN L191 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-13 21:11:54,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:11:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 21:11:54,683 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:54,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [7] total 20 [2019-10-13 21:11:54,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358402151] [2019-10-13 21:11:54,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 21:11:54,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 21:11:54,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:11:54,685 INFO L87 Difference]: Start difference. First operand 9901 states and 15813 transitions. Second operand 15 states. [2019-10-13 21:12:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:12:00,211 INFO L93 Difference]: Finished difference Result 22354 states and 36119 transitions. [2019-10-13 21:12:00,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 21:12:00,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2019-10-13 21:12:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:12:00,319 INFO L225 Difference]: With dead ends: 22354 [2019-10-13 21:12:00,319 INFO L226 Difference]: Without dead ends: 12471 [2019-10-13 21:12:00,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 287 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2019-10-13 21:12:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12471 states. [2019-10-13 21:12:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12471 to 12390. [2019-10-13 21:12:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12390 states. [2019-10-13 21:12:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 19825 transitions. [2019-10-13 21:12:01,014 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 19825 transitions. Word has length 149 [2019-10-13 21:12:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:12:01,015 INFO L462 AbstractCegarLoop]: Abstraction has 12390 states and 19825 transitions. [2019-10-13 21:12:01,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 21:12:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 19825 transitions. [2019-10-13 21:12:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:12:01,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:12:01,028 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:12:01,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:01,238 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:12:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:12:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1256738631, now seen corresponding path program 1 times [2019-10-13 21:12:01,239 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:12:01,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104239892] [2019-10-13 21:12:01,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:01,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:12:01,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:12:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:12:01,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104239892] [2019-10-13 21:12:01,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082413660] [2019-10-13 21:12:01,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:12:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:12:02,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:12:02,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:12:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 21:12:02,178 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:12:02,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:12:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 21:12:02,535 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:12:02,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [7] total 20 [2019-10-13 21:12:02,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750011952] [2019-10-13 21:12:02,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 21:12:02,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:12:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 21:12:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:12:02,537 INFO L87 Difference]: Start difference. First operand 12390 states and 19825 transitions. Second operand 15 states.