java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:53,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:53,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:53,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:53,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:53,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:53,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:53,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:53,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:53,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:53,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:53,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:53,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:53,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:53,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:53,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:53,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:53,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:53,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:53,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:53,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:53,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:53,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:53,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:53,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:53,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:53,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:53,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:53,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:53,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:53,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:53,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:53,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:53,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:53,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:53,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:53,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:53,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:53,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:53,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:53,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:53,113 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 [2019-10-15 01:08:53,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:53,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:53,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:53,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:53,132 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:53,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:53,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:53,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:53,134 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:53,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:53,134 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:53,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:53,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:53,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:53,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:53,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:53,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:53,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:53,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:53,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:53,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:53,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:53,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:53,137 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 [2019-10-15 01:08:53,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:53,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:53,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:53,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:53,460 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:53,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product27.cil.c [2019-10-15 01:08:53,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709b5c69/1af67383ad61422c9d7b8ac19c2ee72d/FLAGfc6e7a6c5 [2019-10-15 01:08:54,217 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:54,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product27.cil.c [2019-10-15 01:08:54,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709b5c69/1af67383ad61422c9d7b8ac19c2ee72d/FLAGfc6e7a6c5 [2019-10-15 01:08:54,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709b5c69/1af67383ad61422c9d7b8ac19c2ee72d [2019-10-15 01:08:54,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:54,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:54,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:54,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:54,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:54,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:54" (1/1) ... [2019-10-15 01:08:54,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74752006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:54, skipping insertion in model container [2019-10-15 01:08:54,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:54" (1/1) ... [2019-10-15 01:08:54,396 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:54,478 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:55,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:55,215 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:55,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:55,509 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:55,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55 WrapperNode [2019-10-15 01:08:55,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:55,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:55,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:55,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:55,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:55,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:55,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:55,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:55,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (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 [2019-10-15 01:08:55,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:55,823 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:08:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:08:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:55,841 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:55,842 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:55,862 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:58,511 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:58,511 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:58,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:58 BoogieIcfgContainer [2019-10-15 01:08:58,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:58,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:58,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:58,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:58,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:54" (1/3) ... [2019-10-15 01:08:58,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8306b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:58, skipping insertion in model container [2019-10-15 01:08:58,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55" (2/3) ... [2019-10-15 01:08:58,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8306b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:58, skipping insertion in model container [2019-10-15 01:08:58,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:58" (3/3) ... [2019-10-15 01:08:58,524 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2019-10-15 01:08:58,535 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:58,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:58,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:58,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:58,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:58,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:58,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:58,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:58,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:58,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:58,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2019-10-15 01:08:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:08:58,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,690 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:58,692 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1141636338, now seen corresponding path program 1 times [2019-10-15 01:08:58,707 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986430768] [2019-10-15 01:08:58,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:59,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986430768] [2019-10-15 01:08:59,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649769450] [2019-10-15 01:08:59,425 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 [2019-10-15 01:09:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:00,197 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:00,558 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:00,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:00,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205958834] [2019-10-15 01:09:00,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:00,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:00,590 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 2 states. [2019-10-15 01:09:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,670 INFO L93 Difference]: Finished difference Result 670 states and 1061 transitions. [2019-10-15 01:09:00,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:00,672 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-15 01:09:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,704 INFO L225 Difference]: With dead ends: 670 [2019-10-15 01:09:00,704 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:09:00,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:09:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-15 01:09:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-15 01:09:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1006 transitions. [2019-10-15 01:09:00,838 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1006 transitions. Word has length 164 [2019-10-15 01:09:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,841 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1006 transitions. [2019-10-15 01:09:00,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1006 transitions. [2019-10-15 01:09:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:00,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,850 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:01,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,067 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash -54443263, now seen corresponding path program 1 times [2019-10-15 01:09:01,067 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178430786] [2019-10-15 01:09:01,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:01,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178430786] [2019-10-15 01:09:01,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035951573] [2019-10-15 01:09:01,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:09:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:02,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:02,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:02,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882626063] [2019-10-15 01:09:02,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:02,367 INFO L87 Difference]: Start difference. First operand 633 states and 1006 transitions. Second operand 4 states. [2019-10-15 01:09:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,526 INFO L93 Difference]: Finished difference Result 1238 states and 1985 transitions. [2019-10-15 01:09:02,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:02,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 01:09:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,537 INFO L225 Difference]: With dead ends: 1238 [2019-10-15 01:09:02,537 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:09:02,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:09:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-15 01:09:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-15 01:09:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1005 transitions. [2019-10-15 01:09:02,601 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1005 transitions. Word has length 166 [2019-10-15 01:09:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,603 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1005 transitions. [2019-10-15 01:09:02,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1005 transitions. [2019-10-15 01:09:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:09:02,613 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,614 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:02,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,831 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash 41360599, now seen corresponding path program 1 times [2019-10-15 01:09:02,832 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:02,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010180724] [2019-10-15 01:09:02,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:03,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010180724] [2019-10-15 01:09:03,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75420761] [2019-10-15 01:09:03,114 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 [2019-10-15 01:09:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 3291 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:03,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:04,059 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:04,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926468685] [2019-10-15 01:09:04,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:04,061 INFO L87 Difference]: Start difference. First operand 633 states and 1005 transitions. Second operand 4 states. [2019-10-15 01:09:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,147 INFO L93 Difference]: Finished difference Result 1238 states and 1983 transitions. [2019-10-15 01:09:04,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:04,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-15 01:09:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,154 INFO L225 Difference]: With dead ends: 1238 [2019-10-15 01:09:04,154 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:09:04,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:09:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-15 01:09:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-15 01:09:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1004 transitions. [2019-10-15 01:09:04,199 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1004 transitions. Word has length 168 [2019-10-15 01:09:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,200 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1004 transitions. [2019-10-15 01:09:04,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1004 transitions. [2019-10-15 01:09:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:04,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,205 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:04,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,416 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1984965257, now seen corresponding path program 1 times [2019-10-15 01:09:04,417 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645437644] [2019-10-15 01:09:04,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:04,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645437644] [2019-10-15 01:09:04,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347226545] [2019-10-15 01:09:04,554 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 [2019-10-15 01:09:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:05,292 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:05,588 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:05,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676431321] [2019-10-15 01:09:05,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:05,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:05,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:05,590 INFO L87 Difference]: Start difference. First operand 633 states and 1004 transitions. Second operand 4 states. [2019-10-15 01:09:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,668 INFO L93 Difference]: Finished difference Result 1245 states and 1990 transitions. [2019-10-15 01:09:05,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:05,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-15 01:09:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,674 INFO L225 Difference]: With dead ends: 1245 [2019-10-15 01:09:05,674 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:05,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1016 transitions. [2019-10-15 01:09:05,703 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1016 transitions. Word has length 170 [2019-10-15 01:09:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:05,704 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1016 transitions. [2019-10-15 01:09:05,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1016 transitions. [2019-10-15 01:09:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:09:05,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:05,709 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:05,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,926 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1663399092, now seen corresponding path program 1 times [2019-10-15 01:09:05,927 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:05,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70401541] [2019-10-15 01:09:05,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:06,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70401541] [2019-10-15 01:09:06,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98910120] [2019-10-15 01:09:06,049 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 [2019-10-15 01:09:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:06,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:06,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:07,088 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:07,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930406462] [2019-10-15 01:09:07,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:07,091 INFO L87 Difference]: Start difference. First operand 642 states and 1016 transitions. Second operand 4 states. [2019-10-15 01:09:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,192 INFO L93 Difference]: Finished difference Result 1247 states and 1991 transitions. [2019-10-15 01:09:07,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:07,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-15 01:09:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,212 INFO L225 Difference]: With dead ends: 1247 [2019-10-15 01:09:07,213 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:07,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1015 transitions. [2019-10-15 01:09:07,265 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1015 transitions. Word has length 171 [2019-10-15 01:09:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,266 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1015 transitions. [2019-10-15 01:09:07,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1015 transitions. [2019-10-15 01:09:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 01:09:07,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,275 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:07,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,495 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 424078317, now seen corresponding path program 1 times [2019-10-15 01:09:07,496 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869546316] [2019-10-15 01:09:07,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:07,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869546316] [2019-10-15 01:09:07,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117019622] [2019-10-15 01:09:07,646 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 [2019-10-15 01:09:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:08,401 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:08,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:08,706 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114067515] [2019-10-15 01:09:08,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:08,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:08,711 INFO L87 Difference]: Start difference. First operand 642 states and 1015 transitions. Second operand 4 states. [2019-10-15 01:09:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:08,826 INFO L93 Difference]: Finished difference Result 1247 states and 1990 transitions. [2019-10-15 01:09:08,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:08,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-15 01:09:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:08,844 INFO L225 Difference]: With dead ends: 1247 [2019-10-15 01:09:08,844 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:08,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1014 transitions. [2019-10-15 01:09:08,884 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1014 transitions. Word has length 172 [2019-10-15 01:09:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:08,885 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1014 transitions. [2019-10-15 01:09:08,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1014 transitions. [2019-10-15 01:09:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:09:08,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:08,895 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,115 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 799135704, now seen corresponding path program 1 times [2019-10-15 01:09:09,117 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7643527] [2019-10-15 01:09:09,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:09,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7643527] [2019-10-15 01:09:09,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677517147] [2019-10-15 01:09:09,530 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 [2019-10-15 01:09:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:10,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:10,898 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:10,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379473568] [2019-10-15 01:09:10,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:10,903 INFO L87 Difference]: Start difference. First operand 642 states and 1014 transitions. Second operand 4 states. [2019-10-15 01:09:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:11,071 INFO L93 Difference]: Finished difference Result 1246 states and 1990 transitions. [2019-10-15 01:09:11,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:11,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-15 01:09:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:11,078 INFO L225 Difference]: With dead ends: 1246 [2019-10-15 01:09:11,078 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:11,082 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1009 transitions. [2019-10-15 01:09:11,105 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1009 transitions. Word has length 173 [2019-10-15 01:09:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:11,106 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1009 transitions. [2019-10-15 01:09:11,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1009 transitions. [2019-10-15 01:09:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:09:11,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:11,112 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:11,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,328 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash 524690856, now seen corresponding path program 1 times [2019-10-15 01:09:11,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511649493] [2019-10-15 01:09:11,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:11,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511649493] [2019-10-15 01:09:11,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775431982] [2019-10-15 01:09:11,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:12,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:12,384 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:12,676 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:12,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:12,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250759732] [2019-10-15 01:09:12,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:12,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:12,684 INFO L87 Difference]: Start difference. First operand 642 states and 1009 transitions. Second operand 4 states. [2019-10-15 01:09:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,881 INFO L93 Difference]: Finished difference Result 1246 states and 1980 transitions. [2019-10-15 01:09:12,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:12,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-15 01:09:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,892 INFO L225 Difference]: With dead ends: 1246 [2019-10-15 01:09:12,893 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:12,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1004 transitions. [2019-10-15 01:09:12,938 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1004 transitions. Word has length 175 [2019-10-15 01:09:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,938 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1004 transitions. [2019-10-15 01:09:12,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1004 transitions. [2019-10-15 01:09:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 01:09:12,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,948 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:13,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,168 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash 493279630, now seen corresponding path program 1 times [2019-10-15 01:09:13,169 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000158719] [2019-10-15 01:09:13,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:13,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000158719] [2019-10-15 01:09:13,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708638192] [2019-10-15 01:09:13,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:14,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:14,978 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:14,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:14,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612697700] [2019-10-15 01:09:14,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:14,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:14,984 INFO L87 Difference]: Start difference. First operand 642 states and 1004 transitions. Second operand 4 states. [2019-10-15 01:09:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:15,443 INFO L93 Difference]: Finished difference Result 1282 states and 2029 transitions. [2019-10-15 01:09:15,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:15,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-15 01:09:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:15,451 INFO L225 Difference]: With dead ends: 1282 [2019-10-15 01:09:15,451 INFO L226 Difference]: Without dead ends: 681 [2019-10-15 01:09:15,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-15 01:09:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2019-10-15 01:09:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-15 01:09:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1068 transitions. [2019-10-15 01:09:15,480 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1068 transitions. Word has length 177 [2019-10-15 01:09:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:15,482 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1068 transitions. [2019-10-15 01:09:15,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1068 transitions. [2019-10-15 01:09:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:09:15,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:15,488 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:15,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,705 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1246954601, now seen corresponding path program 1 times [2019-10-15 01:09:15,706 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:15,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431885731] [2019-10-15 01:09:15,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:15,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431885731] [2019-10-15 01:09:15,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822377476] [2019-10-15 01:09:15,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:16,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:16,731 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:17,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:17,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:17,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444970301] [2019-10-15 01:09:17,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:17,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:17,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:17,104 INFO L87 Difference]: Start difference. First operand 681 states and 1068 transitions. Second operand 4 states. [2019-10-15 01:09:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,289 INFO L93 Difference]: Finished difference Result 1285 states and 2032 transitions. [2019-10-15 01:09:17,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:17,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-15 01:09:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,295 INFO L225 Difference]: With dead ends: 1285 [2019-10-15 01:09:17,295 INFO L226 Difference]: Without dead ends: 681 [2019-10-15 01:09:17,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-15 01:09:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2019-10-15 01:09:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-15 01:09:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1063 transitions. [2019-10-15 01:09:17,322 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1063 transitions. Word has length 178 [2019-10-15 01:09:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,322 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1063 transitions. [2019-10-15 01:09:17,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1063 transitions. [2019-10-15 01:09:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:09:17,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,328 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:17,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,546 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash 464906472, now seen corresponding path program 1 times [2019-10-15 01:09:17,546 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658455321] [2019-10-15 01:09:17,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:17,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658455321] [2019-10-15 01:09:17,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053986450] [2019-10-15 01:09:17,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 3297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:18,537 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:18,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:09:19,093 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:19,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:19,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484918614] [2019-10-15 01:09:19,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:19,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:19,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:19,096 INFO L87 Difference]: Start difference. First operand 681 states and 1063 transitions. Second operand 9 states. [2019-10-15 01:09:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,386 INFO L93 Difference]: Finished difference Result 1298 states and 2046 transitions. [2019-10-15 01:09:19,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:19,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-15 01:09:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,392 INFO L225 Difference]: With dead ends: 1298 [2019-10-15 01:09:19,392 INFO L226 Difference]: Without dead ends: 697 [2019-10-15 01:09:19,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-15 01:09:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 690. [2019-10-15 01:09:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-15 01:09:19,421 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 178 [2019-10-15 01:09:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,422 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-15 01:09:19,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-15 01:09:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:09:19,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,427 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:19,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,644 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1923884298, now seen corresponding path program 1 times [2019-10-15 01:09:19,645 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:19,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985328338] [2019-10-15 01:09:19,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:09:19,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985328338] [2019-10-15 01:09:19,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28220335] [2019-10-15 01:09:19,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:20,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:20,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:20,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:20,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:20,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104051008] [2019-10-15 01:09:20,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:20,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:20,850 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 4 states. [2019-10-15 01:09:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:21,043 INFO L93 Difference]: Finished difference Result 1299 states and 2049 transitions. [2019-10-15 01:09:21,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:21,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-15 01:09:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:21,049 INFO L225 Difference]: With dead ends: 1299 [2019-10-15 01:09:21,049 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:21,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-15 01:09:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1071 transitions. [2019-10-15 01:09:21,087 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1071 transitions. Word has length 179 [2019-10-15 01:09:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:21,087 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1071 transitions. [2019-10-15 01:09:21,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1071 transitions. [2019-10-15 01:09:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:09:21,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:21,093 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:21,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:21,302 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -204843997, now seen corresponding path program 1 times [2019-10-15 01:09:21,303 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:21,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050984278] [2019-10-15 01:09:21,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:09:21,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050984278] [2019-10-15 01:09:21,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356809900] [2019-10-15 01:09:21,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 3302 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:22,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:22,799 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:22,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:22,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983365068] [2019-10-15 01:09:22,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:22,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:22,801 INFO L87 Difference]: Start difference. First operand 690 states and 1071 transitions. Second operand 11 states. [2019-10-15 01:09:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:22,951 INFO L93 Difference]: Finished difference Result 1236 states and 1943 transitions. [2019-10-15 01:09:22,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:22,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-10-15 01:09:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:22,957 INFO L225 Difference]: With dead ends: 1236 [2019-10-15 01:09:22,957 INFO L226 Difference]: Without dead ends: 707 [2019-10-15 01:09:22,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2019-10-15 01:09:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 697. [2019-10-15 01:09:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:09:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1081 transitions. [2019-10-15 01:09:22,992 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1081 transitions. Word has length 180 [2019-10-15 01:09:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:22,993 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1081 transitions. [2019-10-15 01:09:22,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1081 transitions. [2019-10-15 01:09:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:09:22,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:22,999 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:23,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,209 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 521080781, now seen corresponding path program 1 times [2019-10-15 01:09:23,210 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078235481] [2019-10-15 01:09:23,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,211 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:23,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078235481] [2019-10-15 01:09:23,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726324051] [2019-10-15 01:09:23,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 3303 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:24,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:24,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:24,795 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:24,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:24,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501106440] [2019-10-15 01:09:24,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:24,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:24,801 INFO L87 Difference]: Start difference. First operand 697 states and 1081 transitions. Second operand 8 states. [2019-10-15 01:09:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:24,918 INFO L93 Difference]: Finished difference Result 1240 states and 1952 transitions. [2019-10-15 01:09:24,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:24,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 181 [2019-10-15 01:09:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:24,924 INFO L225 Difference]: With dead ends: 1240 [2019-10-15 01:09:24,925 INFO L226 Difference]: Without dead ends: 711 [2019-10-15 01:09:24,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2019-10-15 01:09:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 704. [2019-10-15 01:09:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-15 01:09:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1092 transitions. [2019-10-15 01:09:24,963 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1092 transitions. Word has length 181 [2019-10-15 01:09:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:24,964 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1092 transitions. [2019-10-15 01:09:24,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1092 transitions. [2019-10-15 01:09:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:09:24,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:24,971 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:25,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:25,188 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 528409421, now seen corresponding path program 1 times [2019-10-15 01:09:25,189 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:25,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337150800] [2019-10-15 01:09:25,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:25,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337150800] [2019-10-15 01:09:25,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40190994] [2019-10-15 01:09:25,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 3299 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:26,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:09:26,230 INFO L321 TraceCheckSpWp]: Computing backward predicates...