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_spec14_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:06,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:06,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:06,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:06,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:06,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:06,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:06,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:06,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:06,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:06,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:06,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:06,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:06,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:06,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:06,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:06,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:06,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:06,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:06,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:06,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:06,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:06,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:06,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:06,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:06,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:06,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:06,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:06,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:06,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:06,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:06,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:06,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:06,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:06,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:06,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:06,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:06,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:06,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:06,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:06,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:06,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:06,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:06,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:06,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:06,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:06,717 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:06,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:06,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:06,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:06,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:06,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:06,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:06,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:06,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:06,721 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:06,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:06,722 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:06,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:06,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:06,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:06,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:06,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:06,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:06,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:06,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:06,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:06,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:06,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:06,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:06,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:07,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:07,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:07,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:07,051 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:07,051 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:07,052 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product23.cil.c [2019-10-13 21:09:07,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b018ebf34/43a7b37b9fa44cbf97c24960c411e3c2/FLAG8f3c47d6d [2019-10-13 21:09:07,791 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:07,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product23.cil.c [2019-10-13 21:09:07,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b018ebf34/43a7b37b9fa44cbf97c24960c411e3c2/FLAG8f3c47d6d [2019-10-13 21:09:07,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b018ebf34/43a7b37b9fa44cbf97c24960c411e3c2 [2019-10-13 21:09:07,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:07,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:07,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:07,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:08,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:08,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:07" (1/1) ... [2019-10-13 21:09:08,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6228bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:08, skipping insertion in model container [2019-10-13 21:09:08,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:07" (1/1) ... [2019-10-13 21:09:08,011 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:08,091 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:08,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:08,990 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:09,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:09,207 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:09,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09 WrapperNode [2019-10-13 21:09:09,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:09,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:09,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:09,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:09,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:09,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:09,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:09,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:09,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:09,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:09,475 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:09,475 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:09,475 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:09,475 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:09,476 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:09,476 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:09,476 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:09,477 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:09,477 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:09,477 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:09,477 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:09,478 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:09,478 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:09,478 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:09,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:09,480 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:09,480 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:09,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-13 21:09:09,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:09,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:09,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:09,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:09,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:09,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:09,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:09,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:09,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:09,486 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:09,486 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:09,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:09,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:09,486 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:09,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:09,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:09,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:09,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:09,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:09,489 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:09,489 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:09,489 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:09,489 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:09,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:09,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:09,491 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:09,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-13 21:09:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:12,352 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:12,352 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:12,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:12 BoogieIcfgContainer [2019-10-13 21:09:12,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:12,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:12,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:12,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:07" (1/3) ... [2019-10-13 21:09:12,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0f9764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:12, skipping insertion in model container [2019-10-13 21:09:12,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09" (2/3) ... [2019-10-13 21:09:12,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0f9764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:12, skipping insertion in model container [2019-10-13 21:09:12,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:12" (3/3) ... [2019-10-13 21:09:12,366 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2019-10-13 21:09:12,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:12,388 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:12,399 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:12,439 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:12,439 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:12,439 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:12,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:12,440 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:12,440 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:12,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:12,440 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states. [2019-10-13 21:09:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:09:12,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:12,530 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:12,534 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1117426819, now seen corresponding path program 1 times [2019-10-13 21:09:12,551 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:12,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758558407] [2019-10-13 21:09:12,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:13,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758558407] [2019-10-13 21:09:13,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:13,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:13,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179566010] [2019-10-13 21:09:13,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:13,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:13,237 INFO L87 Difference]: Start difference. First operand 766 states. Second operand 4 states. [2019-10-13 21:09:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:13,452 INFO L93 Difference]: Finished difference Result 1230 states and 1960 transitions. [2019-10-13 21:09:13,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:13,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-10-13 21:09:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:13,492 INFO L225 Difference]: With dead ends: 1230 [2019-10-13 21:09:13,493 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:13,506 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 21:09:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 971 transitions. [2019-10-13 21:09:13,653 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 971 transitions. Word has length 135 [2019-10-13 21:09:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:13,654 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 971 transitions. [2019-10-13 21:09:13,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 971 transitions. [2019-10-13 21:09:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:09:13,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:13,672 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:13,673 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1099628587, now seen corresponding path program 1 times [2019-10-13 21:09:13,674 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:13,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112853592] [2019-10-13 21:09:13,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,675 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:13,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112853592] [2019-10-13 21:09:13,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:13,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:13,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267139305] [2019-10-13 21:09:13,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:13,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:13,964 INFO L87 Difference]: Start difference. First operand 618 states and 971 transitions. Second operand 4 states. [2019-10-13 21:09:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,068 INFO L93 Difference]: Finished difference Result 1203 states and 1903 transitions. [2019-10-13 21:09:14,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:14,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-10-13 21:09:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,075 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:09:14,075 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:14,079 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 21:09:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 970 transitions. [2019-10-13 21:09:14,112 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 970 transitions. Word has length 136 [2019-10-13 21:09:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,113 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 970 transitions. [2019-10-13 21:09:14,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 970 transitions. [2019-10-13 21:09:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:09:14,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,165 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:14,165 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 896519935, now seen corresponding path program 1 times [2019-10-13 21:09:14,166 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294001548] [2019-10-13 21:09:14,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:14,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294001548] [2019-10-13 21:09:14,373 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,373 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:14,373 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959766125] [2019-10-13 21:09:14,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:14,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:14,375 INFO L87 Difference]: Start difference. First operand 618 states and 970 transitions. Second operand 4 states. [2019-10-13 21:09:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,458 INFO L93 Difference]: Finished difference Result 1203 states and 1902 transitions. [2019-10-13 21:09:14,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:14,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 21:09:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,464 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:09:14,464 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:14,468 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 21:09:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 969 transitions. [2019-10-13 21:09:14,496 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 969 transitions. Word has length 137 [2019-10-13 21:09:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,497 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 969 transitions. [2019-10-13 21:09:14,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 969 transitions. [2019-10-13 21:09:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:09:14,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,503 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:14,503 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash -756244441, now seen corresponding path program 1 times [2019-10-13 21:09:14,504 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166588816] [2019-10-13 21:09:14,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:14,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166588816] [2019-10-13 21:09:14,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:14,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424638307] [2019-10-13 21:09:14,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:14,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:14,644 INFO L87 Difference]: Start difference. First operand 618 states and 969 transitions. Second operand 4 states. [2019-10-13 21:09:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,739 INFO L93 Difference]: Finished difference Result 1203 states and 1901 transitions. [2019-10-13 21:09:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:14,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-13 21:09:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,747 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:09:14,747 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:14,753 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 21:09:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 968 transitions. [2019-10-13 21:09:14,786 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 968 transitions. Word has length 138 [2019-10-13 21:09:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,786 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 968 transitions. [2019-10-13 21:09:14,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 968 transitions. [2019-10-13 21:09:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 21:09:14,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,793 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:14,794 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,794 INFO L82 PathProgramCache]: Analyzing trace with hash -103696005, now seen corresponding path program 1 times [2019-10-13 21:09:14,794 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972714201] [2019-10-13 21:09:14,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:14,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972714201] [2019-10-13 21:09:14,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:14,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501820523] [2019-10-13 21:09:14,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:14,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:14,999 INFO L87 Difference]: Start difference. First operand 618 states and 968 transitions. Second operand 4 states. [2019-10-13 21:09:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,068 INFO L93 Difference]: Finished difference Result 1203 states and 1900 transitions. [2019-10-13 21:09:15,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:15,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-13 21:09:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,075 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:09:15,075 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:15,079 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 21:09:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 967 transitions. [2019-10-13 21:09:15,105 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 967 transitions. Word has length 139 [2019-10-13 21:09:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,105 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 967 transitions. [2019-10-13 21:09:15,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 967 transitions. [2019-10-13 21:09:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:15,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,111 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,111 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1000894429, now seen corresponding path program 1 times [2019-10-13 21:09:15,112 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304380267] [2019-10-13 21:09:15,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:15,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304380267] [2019-10-13 21:09:15,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:09:15,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829352205] [2019-10-13 21:09:15,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:09:15,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:09:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:15,331 INFO L87 Difference]: Start difference. First operand 618 states and 967 transitions. Second operand 10 states. [2019-10-13 21:09:15,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,563 INFO L93 Difference]: Finished difference Result 1208 states and 1907 transitions. [2019-10-13 21:09:15,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:09:15,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-10-13 21:09:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,577 INFO L225 Difference]: With dead ends: 1208 [2019-10-13 21:09:15,578 INFO L226 Difference]: Without dead ends: 627 [2019-10-13 21:09:15,584 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-10-13 21:09:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 625. [2019-10-13 21:09:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-13 21:09:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 977 transitions. [2019-10-13 21:09:15,626 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 977 transitions. Word has length 140 [2019-10-13 21:09:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,626 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 977 transitions. [2019-10-13 21:09:15,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:09:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 977 transitions. [2019-10-13 21:09:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:15,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,632 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,632 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1987477118, now seen corresponding path program 1 times [2019-10-13 21:09:15,633 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665780473] [2019-10-13 21:09:15,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:15,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665780473] [2019-10-13 21:09:15,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:15,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246161074] [2019-10-13 21:09:15,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:15,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:15,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:15,820 INFO L87 Difference]: Start difference. First operand 625 states and 977 transitions. Second operand 4 states. [2019-10-13 21:09:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,893 INFO L93 Difference]: Finished difference Result 1209 states and 1908 transitions. [2019-10-13 21:09:15,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:15,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:09:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,900 INFO L225 Difference]: With dead ends: 1209 [2019-10-13 21:09:15,900 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:15,904 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 21:09:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 970 transitions. [2019-10-13 21:09:15,935 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 970 transitions. Word has length 140 [2019-10-13 21:09:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,935 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 970 transitions. [2019-10-13 21:09:15,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 970 transitions. [2019-10-13 21:09:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 21:09:15,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,941 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,941 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1145901007, now seen corresponding path program 1 times [2019-10-13 21:09:15,942 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714952577] [2019-10-13 21:09:15,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:16,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714952577] [2019-10-13 21:09:16,092 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:16,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:16,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329104425] [2019-10-13 21:09:16,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:16,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:16,094 INFO L87 Difference]: Start difference. First operand 621 states and 970 transitions. Second operand 6 states. [2019-10-13 21:09:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:16,434 INFO L93 Difference]: Finished difference Result 1222 states and 1932 transitions. [2019-10-13 21:09:16,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:09:16,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 21:09:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:16,442 INFO L225 Difference]: With dead ends: 1222 [2019-10-13 21:09:16,443 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:16,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 626. [2019-10-13 21:09:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 971 transitions. [2019-10-13 21:09:16,483 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 971 transitions. Word has length 141 [2019-10-13 21:09:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:16,483 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 971 transitions. [2019-10-13 21:09:16,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 971 transitions. [2019-10-13 21:09:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:09:16,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:16,491 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:16,491 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1935329146, now seen corresponding path program 1 times [2019-10-13 21:09:16,492 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:16,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601062053] [2019-10-13 21:09:16,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:16,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601062053] [2019-10-13 21:09:16,684 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:16,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:16,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540731233] [2019-10-13 21:09:16,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:16,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:16,687 INFO L87 Difference]: Start difference. First operand 626 states and 971 transitions. Second operand 6 states. [2019-10-13 21:09:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,090 INFO L93 Difference]: Finished difference Result 1185 states and 1847 transitions. [2019-10-13 21:09:17,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:17,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-13 21:09:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:17,104 INFO L225 Difference]: With dead ends: 1185 [2019-10-13 21:09:17,104 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:17,109 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 967 transitions. [2019-10-13 21:09:17,170 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 967 transitions. Word has length 142 [2019-10-13 21:09:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:17,171 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 967 transitions. [2019-10-13 21:09:17,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 967 transitions. [2019-10-13 21:09:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:09:17,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:17,178 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:17,178 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash 210411572, now seen corresponding path program 1 times [2019-10-13 21:09:17,179 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:17,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875994219] [2019-10-13 21:09:17,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:17,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875994219] [2019-10-13 21:09:17,336 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:17,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:17,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914060867] [2019-10-13 21:09:17,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:17,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:17,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:17,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:17,338 INFO L87 Difference]: Start difference. First operand 626 states and 967 transitions. Second operand 6 states. [2019-10-13 21:09:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,578 INFO L93 Difference]: Finished difference Result 1185 states and 1843 transitions. [2019-10-13 21:09:17,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:17,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-13 21:09:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:17,584 INFO L225 Difference]: With dead ends: 1185 [2019-10-13 21:09:17,585 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:17,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 963 transitions. [2019-10-13 21:09:17,620 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 963 transitions. Word has length 143 [2019-10-13 21:09:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:17,621 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 963 transitions. [2019-10-13 21:09:17,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 963 transitions. [2019-10-13 21:09:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:09:17,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:17,627 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:17,627 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash 487742644, now seen corresponding path program 1 times [2019-10-13 21:09:17,628 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:17,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491877559] [2019-10-13 21:09:17,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:17,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491877559] [2019-10-13 21:09:17,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:17,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:09:17,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539826554] [2019-10-13 21:09:17,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:17,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:17,780 INFO L87 Difference]: Start difference. First operand 626 states and 963 transitions. Second operand 7 states. [2019-10-13 21:09:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:18,027 INFO L93 Difference]: Finished difference Result 1188 states and 1843 transitions. [2019-10-13 21:09:18,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:18,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-13 21:09:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,035 INFO L225 Difference]: With dead ends: 1188 [2019-10-13 21:09:18,035 INFO L226 Difference]: Without dead ends: 608 [2019-10-13 21:09:18,040 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 21:09:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-10-13 21:09:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2019-10-13 21:09:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 926 transitions. [2019-10-13 21:09:18,074 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 926 transitions. Word has length 143 [2019-10-13 21:09:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,075 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 926 transitions. [2019-10-13 21:09:18,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 926 transitions. [2019-10-13 21:09:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:09:18,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,082 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:18,083 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1183492043, now seen corresponding path program 1 times [2019-10-13 21:09:18,084 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249670704] [2019-10-13 21:09:18,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:18,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249670704] [2019-10-13 21:09:18,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:18,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:18,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822190162] [2019-10-13 21:09:18,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:18,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:18,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:18,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:18,272 INFO L87 Difference]: Start difference. First operand 605 states and 926 transitions. Second operand 6 states. [2019-10-13 21:09:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:18,428 INFO L93 Difference]: Finished difference Result 1164 states and 1802 transitions. [2019-10-13 21:09:18,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:18,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-13 21:09:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,433 INFO L225 Difference]: With dead ends: 1164 [2019-10-13 21:09:18,434 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:09:18,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:09:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:09:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 925 transitions. [2019-10-13 21:09:18,463 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 925 transitions. Word has length 144 [2019-10-13 21:09:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,464 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 925 transitions. [2019-10-13 21:09:18,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 925 transitions. [2019-10-13 21:09:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:09:18,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,469 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:18,469 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 163843225, now seen corresponding path program 1 times [2019-10-13 21:09:18,470 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099247334] [2019-10-13 21:09:18,470 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:18,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099247334] [2019-10-13 21:09:18,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:18,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:18,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93385513] [2019-10-13 21:09:18,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:18,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:18,616 INFO L87 Difference]: Start difference. First operand 605 states and 925 transitions. Second operand 6 states. [2019-10-13 21:09:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:18,763 INFO L93 Difference]: Finished difference Result 1164 states and 1801 transitions. [2019-10-13 21:09:18,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:18,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-13 21:09:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,768 INFO L225 Difference]: With dead ends: 1164 [2019-10-13 21:09:18,768 INFO L226 Difference]: Without dead ends: 605 [2019-10-13 21:09:18,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-13 21:09:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-13 21:09:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-13 21:09:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 924 transitions. [2019-10-13 21:09:18,797 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 924 transitions. Word has length 145 [2019-10-13 21:09:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,797 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 924 transitions. [2019-10-13 21:09:18,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 924 transitions. [2019-10-13 21:09:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:09:18,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,802 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:18,803 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1794095888, now seen corresponding path program 1 times [2019-10-13 21:09:18,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483260739] [2019-10-13 21:09:18,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:19,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483260739] [2019-10-13 21:09:19,030 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:19,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:09:19,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529326398] [2019-10-13 21:09:19,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:09:19,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:09:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:19,032 INFO L87 Difference]: Start difference. First operand 605 states and 924 transitions. Second operand 12 states. [2019-10-13 21:09:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:19,428 INFO L93 Difference]: Finished difference Result 1170 states and 1811 transitions. [2019-10-13 21:09:19,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:19,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-10-13 21:09:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:19,434 INFO L225 Difference]: With dead ends: 1170 [2019-10-13 21:09:19,435 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:19,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 610. [2019-10-13 21:09:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2019-10-13 21:09:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 930 transitions. [2019-10-13 21:09:19,465 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 930 transitions. Word has length 146 [2019-10-13 21:09:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:19,466 INFO L462 AbstractCegarLoop]: Abstraction has 610 states and 930 transitions. [2019-10-13 21:09:19,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:09:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 930 transitions. [2019-10-13 21:09:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:19,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:19,471 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:19,472 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 114192712, now seen corresponding path program 1 times [2019-10-13 21:09:19,472 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:19,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426154473] [2019-10-13 21:09:19,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:09:19,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426154473] [2019-10-13 21:09:19,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38190839] [2019-10-13 21:09:19,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:20,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:20,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:09:20,336 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:09:20,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:20,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-10-13 21:09:20,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927348463] [2019-10-13 21:09:20,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:20,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:20,744 INFO L87 Difference]: Start difference. First operand 610 states and 930 transitions. Second operand 5 states. [2019-10-13 21:09:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:21,612 INFO L93 Difference]: Finished difference Result 1175 states and 1847 transitions. [2019-10-13 21:09:21,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:21,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-13 21:09:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:21,619 INFO L225 Difference]: With dead ends: 1175 [2019-10-13 21:09:21,619 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 21:09:21,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 21:09:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-13 21:09:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-13 21:09:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 943 transitions. [2019-10-13 21:09:21,666 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 943 transitions. Word has length 147 [2019-10-13 21:09:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:21,667 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 943 transitions. [2019-10-13 21:09:21,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 943 transitions. [2019-10-13 21:09:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:09:21,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:21,673 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:21,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:21,891 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1841294517, now seen corresponding path program 1 times [2019-10-13 21:09:21,892 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:21,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194982599] [2019-10-13 21:09:21,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:21,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:21,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:22,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194982599] [2019-10-13 21:09:22,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978616837] [2019-10-13 21:09:22,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:22,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:22,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:23,044 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:23,376 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:23,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-10-13 21:09:23,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308054817] [2019-10-13 21:09:23,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:23,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:23,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:23,378 INFO L87 Difference]: Start difference. First operand 618 states and 943 transitions. Second operand 5 states. [2019-10-13 21:09:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:24,374 INFO L93 Difference]: Finished difference Result 1191 states and 1870 transitions. [2019-10-13 21:09:24,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:24,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-13 21:09:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:24,384 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:09:24,385 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:09:24,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 290 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:09:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:09:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:09:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 956 transitions. [2019-10-13 21:09:24,430 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 956 transitions. Word has length 150 [2019-10-13 21:09:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:24,431 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 956 transitions. [2019-10-13 21:09:24,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 956 transitions. [2019-10-13 21:09:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:09:24,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:24,437 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:24,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:24,656 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:24,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1337110188, now seen corresponding path program 1 times [2019-10-13 21:09:24,657 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:24,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895876241] [2019-10-13 21:09:24,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:24,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:24,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:24,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895876241] [2019-10-13 21:09:24,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987082614] [2019-10-13 21:09:24,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:25,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:25,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:09:25,796 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:09:26,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:26,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-10-13 21:09:26,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570179593] [2019-10-13 21:09:26,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:26,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:26,131 INFO L87 Difference]: Start difference. First operand 626 states and 956 transitions. Second operand 5 states. [2019-10-13 21:09:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:27,005 INFO L93 Difference]: Finished difference Result 1207 states and 1893 transitions. [2019-10-13 21:09:27,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:27,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-13 21:09:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:27,011 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:09:27,011 INFO L226 Difference]: Without dead ends: 634 [2019-10-13 21:09:27,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-10-13 21:09:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-10-13 21:09:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-10-13 21:09:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 969 transitions. [2019-10-13 21:09:27,040 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 969 transitions. Word has length 153 [2019-10-13 21:09:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:27,041 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 969 transitions. [2019-10-13 21:09:27,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 969 transitions. [2019-10-13 21:09:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:09:27,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:27,047 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:27,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:27,261 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -938944175, now seen corresponding path program 1 times [2019-10-13 21:09:27,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:27,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797035464] [2019-10-13 21:09:27,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:27,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797035464] [2019-10-13 21:09:27,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610731718] [2019-10-13 21:09:27,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:28,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:28,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:09:28,109 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:09:28,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:28,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 16 [2019-10-13 21:09:28,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964667097] [2019-10-13 21:09:28,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:28,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:28,406 INFO L87 Difference]: Start difference. First operand 634 states and 969 transitions. Second operand 5 states. [2019-10-13 21:09:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:29,239 INFO L93 Difference]: Finished difference Result 1223 states and 1916 transitions. [2019-10-13 21:09:29,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:29,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-13 21:09:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:29,246 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:09:29,246 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:09:29,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:09:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:09:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:09:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 982 transitions. [2019-10-13 21:09:29,273 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 982 transitions. Word has length 156 [2019-10-13 21:09:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:29,273 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 982 transitions. [2019-10-13 21:09:29,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 982 transitions. [2019-10-13 21:09:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 21:09:29,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:29,279 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:29,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:29,493 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash 427669008, now seen corresponding path program 1 times [2019-10-13 21:09:29,494 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:29,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100174366] [2019-10-13 21:09:29,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:29,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:29,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:29,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100174366] [2019-10-13 21:09:29,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302394253] [2019-10-13 21:09:29,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:30,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 21:09:30,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:30,278 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:09:30,413 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:30,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-10-13 21:09:30,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045051386] [2019-10-13 21:09:30,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:30,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:30,415 INFO L87 Difference]: Start difference. First operand 642 states and 982 transitions. Second operand 6 states. [2019-10-13 21:09:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:31,253 INFO L93 Difference]: Finished difference Result 1826 states and 2878 transitions. [2019-10-13 21:09:31,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:31,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-13 21:09:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:31,265 INFO L225 Difference]: With dead ends: 1826 [2019-10-13 21:09:31,265 INFO L226 Difference]: Without dead ends: 1237 [2019-10-13 21:09:31,269 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2019-10-13 21:09:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1228. [2019-10-13 21:09:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-10-13 21:09:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1917 transitions. [2019-10-13 21:09:31,322 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1917 transitions. Word has length 159 [2019-10-13 21:09:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:31,323 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1917 transitions. [2019-10-13 21:09:31,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1917 transitions. [2019-10-13 21:09:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:31,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:31,329 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:31,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:31,537 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -319977560, now seen corresponding path program 1 times [2019-10-13 21:09:31,538 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:31,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151202401] [2019-10-13 21:09:31,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:31,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151202401] [2019-10-13 21:09:31,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522785069] [2019-10-13 21:09:31,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:32,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:09:32,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:32,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:09:32,484 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:32,484 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-10-13 21:09:32,484 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350515859] [2019-10-13 21:09:32,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:09:32,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:32,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:09:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:32,486 INFO L87 Difference]: Start difference. First operand 1228 states and 1917 transitions. Second operand 3 states. [2019-10-13 21:09:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:32,605 INFO L93 Difference]: Finished difference Result 2983 states and 4733 transitions. [2019-10-13 21:09:32,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:09:32,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-10-13 21:09:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:32,619 INFO L225 Difference]: With dead ends: 2983 [2019-10-13 21:09:32,619 INFO L226 Difference]: Without dead ends: 1809 [2019-10-13 21:09:32,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2019-10-13 21:09:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1228. [2019-10-13 21:09:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-10-13 21:09:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1916 transitions. [2019-10-13 21:09:32,699 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1916 transitions. Word has length 164 [2019-10-13 21:09:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:32,701 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1916 transitions. [2019-10-13 21:09:32,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:09:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1916 transitions. [2019-10-13 21:09:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:32,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:32,707 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:32,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:32,922 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:32,923 INFO L82 PathProgramCache]: Analyzing trace with hash 103669162, now seen corresponding path program 1 times [2019-10-13 21:09:32,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:32,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379309964] [2019-10-13 21:09:32,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:32,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:32,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:33,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379309964] [2019-10-13 21:09:33,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917989999] [2019-10-13 21:09:33,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:33,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-13 21:09:33,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:09:33,700 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:34,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:34,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-10-13 21:09:34,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845313913] [2019-10-13 21:09:34,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:34,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:34,118 INFO L87 Difference]: Start difference. First operand 1228 states and 1916 transitions. Second operand 9 states.