/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:43:07,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:43:07,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:43:07,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:43:07,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:43:07,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:43:07,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:43:07,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:43:07,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:43:07,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:43:07,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:43:07,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:43:07,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:43:07,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:43:07,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:43:07,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:43:07,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:43:07,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:43:07,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:43:07,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:43:07,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:43:07,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:43:07,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:43:07,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:43:07,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:43:07,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:43:07,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:43:07,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:43:07,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:43:07,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:43:07,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:43:07,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:43:07,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:43:07,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:43:07,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:43:07,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:43:07,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:43:07,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:43:07,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:43:07,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:43:07,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:43:07,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:43:07,207 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:43:07,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:43:07,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:43:07,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:43:07,211 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:43:07,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:43:07,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:43:07,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:43:07,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:43:07,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:43:07,213 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:43:07,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:43:07,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:43:07,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:43:07,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:43:07,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:43:07,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:07,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:43:07,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:43:07,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:43:07,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:43:07,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:43:07,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:43:07,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:43:07,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:43:07,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:43:07,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:43:07,514 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:43:07,515 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:43:07,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product03.cil.c [2019-11-07 00:43:07,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6667c74/04200d57e0dc41ebb50f127bb3f505eb/FLAG0e0ff3574 [2019-11-07 00:43:08,256 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:43:08,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product03.cil.c [2019-11-07 00:43:08,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6667c74/04200d57e0dc41ebb50f127bb3f505eb/FLAG0e0ff3574 [2019-11-07 00:43:08,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6667c74/04200d57e0dc41ebb50f127bb3f505eb [2019-11-07 00:43:08,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:43:08,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:43:08,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:08,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:43:08,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:43:08,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:08" (1/1) ... [2019-11-07 00:43:08,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60be0f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:08, skipping insertion in model container [2019-11-07 00:43:08,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:08" (1/1) ... [2019-11-07 00:43:08,493 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:43:08,583 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:43:09,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:09,275 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:43:09,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:09,556 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:43:09,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09 WrapperNode [2019-11-07 00:43:09,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:09,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:43:09,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:43:09,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:43:09,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... [2019-11-07 00:43:09,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:43:09,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:43:09,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:43:09,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:43:09,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:43:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:43:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:09,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:09,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:43:09,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:43:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:43:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:43:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:43:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:09,847 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:43:09,847 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:43:09,848 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:43:09,850 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:43:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:43:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:43:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:43:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:43:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:43:09,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:43:09,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:43:09,853 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:43:09,853 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:43:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:43:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:43:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:43:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:43:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:43:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:43:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:43:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:43:09,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:43:09,856 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:43:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:43:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:43:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:43:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:43:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:43:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__base [2019-11-07 00:43:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:43:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:43:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:43:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-11-07 00:43:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:43:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:43:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:43:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:43:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:43:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:43:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:43:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:43:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:43:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:43:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:43:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:43:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:43:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:43:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:43:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:43:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:43:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:43:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:43:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:43:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:43:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:43:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:43:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:43:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:43:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:43:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:43:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:43:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:43:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:43:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:43:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:43:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:43:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:43:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:43:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:43:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:43:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:43:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:43:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:43:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:43:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:43:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:43:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:43:09,879 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:43:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:43:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:43:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:43:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:43:09,881 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:43:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:43:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:43:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:43:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:43:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:43:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:43:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:43:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:43:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__base [2019-11-07 00:43:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:43:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:43:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-11-07 00:43:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:09,888 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:43:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:43:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:43:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:43:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:43:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:43:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:43:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:43:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:43:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:43:09,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:43:09,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:43:12,311 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:43:12,312 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:43:12,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:12 BoogieIcfgContainer [2019-11-07 00:43:12,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:43:12,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:43:12,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:43:12,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:43:12,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:43:08" (1/3) ... [2019-11-07 00:43:12,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6317ebde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:12, skipping insertion in model container [2019-11-07 00:43:12,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:09" (2/3) ... [2019-11-07 00:43:12,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6317ebde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:12, skipping insertion in model container [2019-11-07 00:43:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:12" (3/3) ... [2019-11-07 00:43:12,323 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2019-11-07 00:43:12,333 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:43:12,345 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:43:12,356 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:43:12,400 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:43:12,401 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:43:12,401 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:43:12,401 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:43:12,401 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:43:12,401 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:43:12,401 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:43:12,401 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:43:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states. [2019-11-07 00:43:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:43:12,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:12,472 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:12,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1710974497, now seen corresponding path program 1 times [2019-11-07 00:43:12,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:12,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874498788] [2019-11-07 00:43:12,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:13,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874498788] [2019-11-07 00:43:13,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:13,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:13,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832924872] [2019-11-07 00:43:13,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:13,195 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:13,213 INFO L87 Difference]: Start difference. First operand 769 states. Second operand 7 states. [2019-11-07 00:43:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:13,512 INFO L93 Difference]: Finished difference Result 1217 states and 1978 transitions. [2019-11-07 00:43:13,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:13,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-11-07 00:43:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:13,544 INFO L225 Difference]: With dead ends: 1217 [2019-11-07 00:43:13,545 INFO L226 Difference]: Without dead ends: 617 [2019-11-07 00:43:13,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-11-07 00:43:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 615. [2019-11-07 00:43:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-11-07 00:43:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 984 transitions. [2019-11-07 00:43:13,726 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 984 transitions. Word has length 141 [2019-11-07 00:43:13,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:13,727 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 984 transitions. [2019-11-07 00:43:13,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:13,727 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 984 transitions. [2019-11-07 00:43:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:43:13,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:13,738 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:13,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:13,739 INFO L82 PathProgramCache]: Analyzing trace with hash 896936914, now seen corresponding path program 1 times [2019-11-07 00:43:13,739 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:13,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120058099] [2019-11-07 00:43:13,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:13,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120058099] [2019-11-07 00:43:13,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:13,983 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:13,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316211931] [2019-11-07 00:43:13,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:13,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:13,988 INFO L87 Difference]: Start difference. First operand 615 states and 984 transitions. Second operand 4 states. [2019-11-07 00:43:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:14,066 INFO L93 Difference]: Finished difference Result 1196 states and 1933 transitions. [2019-11-07 00:43:14,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:14,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 00:43:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:14,073 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:43:14,073 INFO L226 Difference]: Without dead ends: 597 [2019-11-07 00:43:14,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2019-11-07 00:43:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2019-11-07 00:43:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2019-11-07 00:43:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 951 transitions. [2019-11-07 00:43:14,112 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 951 transitions. Word has length 142 [2019-11-07 00:43:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:14,114 INFO L462 AbstractCegarLoop]: Abstraction has 597 states and 951 transitions. [2019-11-07 00:43:14,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 951 transitions. [2019-11-07 00:43:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:43:14,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:14,127 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:14,128 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1517302758, now seen corresponding path program 1 times [2019-11-07 00:43:14,128 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:14,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840200906] [2019-11-07 00:43:14,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:14,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840200906] [2019-11-07 00:43:14,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:14,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:14,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447736562] [2019-11-07 00:43:14,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:14,447 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:14,447 INFO L87 Difference]: Start difference. First operand 597 states and 951 transitions. Second operand 7 states. [2019-11-07 00:43:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:14,560 INFO L93 Difference]: Finished difference Result 1165 states and 1875 transitions. [2019-11-07 00:43:14,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:14,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-07 00:43:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:14,570 INFO L225 Difference]: With dead ends: 1165 [2019-11-07 00:43:14,570 INFO L226 Difference]: Without dead ends: 591 [2019-11-07 00:43:14,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2019-11-07 00:43:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2019-11-07 00:43:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2019-11-07 00:43:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 938 transitions. [2019-11-07 00:43:14,612 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 938 transitions. Word has length 142 [2019-11-07 00:43:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:14,613 INFO L462 AbstractCegarLoop]: Abstraction has 591 states and 938 transitions. [2019-11-07 00:43:14,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 938 transitions. [2019-11-07 00:43:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:43:14,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:14,618 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:14,618 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1570420835, now seen corresponding path program 1 times [2019-11-07 00:43:14,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:14,619 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371013515] [2019-11-07 00:43:14,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:14,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371013515] [2019-11-07 00:43:14,800 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:14,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:14,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582822893] [2019-11-07 00:43:14,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:14,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:14,804 INFO L87 Difference]: Start difference. First operand 591 states and 938 transitions. Second operand 7 states. [2019-11-07 00:43:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:14,941 INFO L93 Difference]: Finished difference Result 1153 states and 1849 transitions. [2019-11-07 00:43:14,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:14,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:43:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:14,946 INFO L225 Difference]: With dead ends: 1153 [2019-11-07 00:43:14,947 INFO L226 Difference]: Without dead ends: 585 [2019-11-07 00:43:14,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-11-07 00:43:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2019-11-07 00:43:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2019-11-07 00:43:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 925 transitions. [2019-11-07 00:43:14,973 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 925 transitions. Word has length 143 [2019-11-07 00:43:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:14,974 INFO L462 AbstractCegarLoop]: Abstraction has 585 states and 925 transitions. [2019-11-07 00:43:14,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 925 transitions. [2019-11-07 00:43:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:43:14,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:14,978 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:14,979 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:14,979 INFO L82 PathProgramCache]: Analyzing trace with hash -115528610, now seen corresponding path program 1 times [2019-11-07 00:43:14,979 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:14,980 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380134879] [2019-11-07 00:43:14,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:15,132 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380134879] [2019-11-07 00:43:15,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:15,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:15,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871406942] [2019-11-07 00:43:15,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:15,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:15,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:15,134 INFO L87 Difference]: Start difference. First operand 585 states and 925 transitions. Second operand 7 states. [2019-11-07 00:43:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:15,224 INFO L93 Difference]: Finished difference Result 1141 states and 1823 transitions. [2019-11-07 00:43:15,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:15,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:43:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:15,230 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:43:15,230 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:15,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 912 transitions. [2019-11-07 00:43:15,259 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 912 transitions. Word has length 144 [2019-11-07 00:43:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:15,260 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 912 transitions. [2019-11-07 00:43:15,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 912 transitions. [2019-11-07 00:43:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:43:15,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:15,264 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:15,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1354475425, now seen corresponding path program 1 times [2019-11-07 00:43:15,266 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:15,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254749074] [2019-11-07 00:43:15,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:15,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254749074] [2019-11-07 00:43:15,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:15,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:15,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745055248] [2019-11-07 00:43:15,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:15,461 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:15,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:15,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:15,462 INFO L87 Difference]: Start difference. First operand 579 states and 912 transitions. Second operand 7 states. [2019-11-07 00:43:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:15,652 INFO L93 Difference]: Finished difference Result 1129 states and 1797 transitions. [2019-11-07 00:43:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:15,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:43:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:15,668 INFO L225 Difference]: With dead ends: 1129 [2019-11-07 00:43:15,668 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:15,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 911 transitions. [2019-11-07 00:43:15,716 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 911 transitions. Word has length 144 [2019-11-07 00:43:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:15,716 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 911 transitions. [2019-11-07 00:43:15,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 911 transitions. [2019-11-07 00:43:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:43:15,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:15,723 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:15,723 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash 538513127, now seen corresponding path program 1 times [2019-11-07 00:43:15,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:15,725 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337280319] [2019-11-07 00:43:15,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:15,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337280319] [2019-11-07 00:43:15,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:15,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:15,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104552569] [2019-11-07 00:43:15,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:15,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:15,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:15,909 INFO L87 Difference]: Start difference. First operand 579 states and 911 transitions. Second operand 5 states. [2019-11-07 00:43:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:15,987 INFO L93 Difference]: Finished difference Result 1128 states and 1794 transitions. [2019-11-07 00:43:15,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:15,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-07 00:43:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:15,996 INFO L225 Difference]: With dead ends: 1128 [2019-11-07 00:43:15,996 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:15,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 910 transitions. [2019-11-07 00:43:16,024 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 910 transitions. Word has length 145 [2019-11-07 00:43:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:16,025 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 910 transitions. [2019-11-07 00:43:16,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 910 transitions. [2019-11-07 00:43:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:43:16,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:16,030 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:16,030 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1098945642, now seen corresponding path program 1 times [2019-11-07 00:43:16,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:16,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976106935] [2019-11-07 00:43:16,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:16,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976106935] [2019-11-07 00:43:16,191 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:16,191 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:16,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035977743] [2019-11-07 00:43:16,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:16,192 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:16,193 INFO L87 Difference]: Start difference. First operand 579 states and 910 transitions. Second operand 5 states. [2019-11-07 00:43:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:16,278 INFO L93 Difference]: Finished difference Result 1128 states and 1792 transitions. [2019-11-07 00:43:16,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:16,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-11-07 00:43:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:16,284 INFO L225 Difference]: With dead ends: 1128 [2019-11-07 00:43:16,284 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:16,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 909 transitions. [2019-11-07 00:43:16,318 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 909 transitions. Word has length 146 [2019-11-07 00:43:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:16,319 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 909 transitions. [2019-11-07 00:43:16,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 909 transitions. [2019-11-07 00:43:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:43:16,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:16,323 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:16,323 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1332579362, now seen corresponding path program 1 times [2019-11-07 00:43:16,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:16,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434679133] [2019-11-07 00:43:16,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:16,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434679133] [2019-11-07 00:43:16,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:16,554 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:16,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237160638] [2019-11-07 00:43:16,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:16,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:16,555 INFO L87 Difference]: Start difference. First operand 579 states and 909 transitions. Second operand 5 states. [2019-11-07 00:43:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:16,621 INFO L93 Difference]: Finished difference Result 1128 states and 1790 transitions. [2019-11-07 00:43:16,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:16,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:43:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:16,627 INFO L225 Difference]: With dead ends: 1128 [2019-11-07 00:43:16,627 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:16,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 908 transitions. [2019-11-07 00:43:16,657 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 908 transitions. Word has length 147 [2019-11-07 00:43:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:16,657 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 908 transitions. [2019-11-07 00:43:16,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 908 transitions. [2019-11-07 00:43:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 00:43:16,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:16,662 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:16,662 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1053582449, now seen corresponding path program 1 times [2019-11-07 00:43:16,664 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:16,664 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469519972] [2019-11-07 00:43:16,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:16,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469519972] [2019-11-07 00:43:16,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:16,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:16,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832402633] [2019-11-07 00:43:16,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:16,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:16,836 INFO L87 Difference]: Start difference. First operand 579 states and 908 transitions. Second operand 5 states. [2019-11-07 00:43:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:16,916 INFO L93 Difference]: Finished difference Result 1128 states and 1788 transitions. [2019-11-07 00:43:16,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:16,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-11-07 00:43:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:16,921 INFO L225 Difference]: With dead ends: 1128 [2019-11-07 00:43:16,922 INFO L226 Difference]: Without dead ends: 579 [2019-11-07 00:43:16,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2019-11-07 00:43:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2019-11-07 00:43:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:43:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 907 transitions. [2019-11-07 00:43:16,950 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 907 transitions. Word has length 148 [2019-11-07 00:43:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:16,951 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 907 transitions. [2019-11-07 00:43:16,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 907 transitions. [2019-11-07 00:43:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 00:43:16,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:16,955 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:16,956 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1647215267, now seen corresponding path program 1 times [2019-11-07 00:43:16,956 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:16,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151192089] [2019-11-07 00:43:16,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:17,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151192089] [2019-11-07 00:43:17,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603729101] [2019-11-07 00:43:17,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:17,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:17,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:43:17,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:18,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:18,002 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 00:43:18,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553462806] [2019-11-07 00:43:18,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:18,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:18,003 INFO L87 Difference]: Start difference. First operand 579 states and 907 transitions. Second operand 3 states. [2019-11-07 00:43:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:18,084 INFO L93 Difference]: Finished difference Result 1616 states and 2581 transitions. [2019-11-07 00:43:18,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:18,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 00:43:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:18,094 INFO L225 Difference]: With dead ends: 1616 [2019-11-07 00:43:18,095 INFO L226 Difference]: Without dead ends: 1071 [2019-11-07 00:43:18,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2019-11-07 00:43:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1058. [2019-11-07 00:43:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2019-11-07 00:43:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1677 transitions. [2019-11-07 00:43:18,147 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1677 transitions. Word has length 149 [2019-11-07 00:43:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:18,148 INFO L462 AbstractCegarLoop]: Abstraction has 1058 states and 1677 transitions. [2019-11-07 00:43:18,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1677 transitions. [2019-11-07 00:43:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:18,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:18,155 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:18,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:18,366 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1008151181, now seen corresponding path program 1 times [2019-11-07 00:43:18,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:18,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463029431] [2019-11-07 00:43:18,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:18,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463029431] [2019-11-07 00:43:18,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:18,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:18,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807213772] [2019-11-07 00:43:18,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:18,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:18,631 INFO L87 Difference]: Start difference. First operand 1058 states and 1677 transitions. Second operand 7 states. [2019-11-07 00:43:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:21,282 INFO L93 Difference]: Finished difference Result 3108 states and 5048 transitions. [2019-11-07 00:43:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:21,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-11-07 00:43:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:21,298 INFO L225 Difference]: With dead ends: 3108 [2019-11-07 00:43:21,298 INFO L226 Difference]: Without dead ends: 2084 [2019-11-07 00:43:21,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-11-07 00:43:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2018. [2019-11-07 00:43:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2018 states. [2019-11-07 00:43:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3265 transitions. [2019-11-07 00:43:21,392 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3265 transitions. Word has length 153 [2019-11-07 00:43:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:21,393 INFO L462 AbstractCegarLoop]: Abstraction has 2018 states and 3265 transitions. [2019-11-07 00:43:21,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3265 transitions. [2019-11-07 00:43:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:43:21,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:21,399 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:21,399 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1609221353, now seen corresponding path program 1 times [2019-11-07 00:43:21,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:21,400 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805819574] [2019-11-07 00:43:21,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:21,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805819574] [2019-11-07 00:43:21,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631098993] [2019-11-07 00:43:21,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:22,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:22,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:43:22,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:22,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:22,571 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 00:43:22,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146623658] [2019-11-07 00:43:22,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:22,572 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:22,573 INFO L87 Difference]: Start difference. First operand 2018 states and 3265 transitions. Second operand 3 states. [2019-11-07 00:43:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:22,760 INFO L93 Difference]: Finished difference Result 4972 states and 8128 transitions. [2019-11-07 00:43:22,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:22,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:43:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:22,784 INFO L225 Difference]: With dead ends: 4972 [2019-11-07 00:43:22,784 INFO L226 Difference]: Without dead ends: 2988 [2019-11-07 00:43:22,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2019-11-07 00:43:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2888. [2019-11-07 00:43:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2888 states. [2019-11-07 00:43:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 4693 transitions. [2019-11-07 00:43:22,935 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 4693 transitions. Word has length 150 [2019-11-07 00:43:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:22,937 INFO L462 AbstractCegarLoop]: Abstraction has 2888 states and 4693 transitions. [2019-11-07 00:43:22,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 4693 transitions. [2019-11-07 00:43:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:22,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:22,946 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:23,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:23,154 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash 484144798, now seen corresponding path program 1 times [2019-11-07 00:43:23,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:23,155 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532834291] [2019-11-07 00:43:23,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:23,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532834291] [2019-11-07 00:43:23,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102776444] [2019-11-07 00:43:23,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:23,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:23,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:43:24,016 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:24,136 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:24,136 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-07 00:43:24,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913132530] [2019-11-07 00:43:24,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:24,139 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:24,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:43:24,140 INFO L87 Difference]: Start difference. First operand 2888 states and 4693 transitions. Second operand 4 states. [2019-11-07 00:43:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:24,349 INFO L93 Difference]: Finished difference Result 5814 states and 9533 transitions. [2019-11-07 00:43:24,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:24,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-07 00:43:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:24,374 INFO L225 Difference]: With dead ends: 5814 [2019-11-07 00:43:24,374 INFO L226 Difference]: Without dead ends: 2960 [2019-11-07 00:43:24,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:43:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-11-07 00:43:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2910. [2019-11-07 00:43:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2910 states. [2019-11-07 00:43:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4721 transitions. [2019-11-07 00:43:24,520 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4721 transitions. Word has length 153 [2019-11-07 00:43:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:24,521 INFO L462 AbstractCegarLoop]: Abstraction has 2910 states and 4721 transitions. [2019-11-07 00:43:24,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4721 transitions. [2019-11-07 00:43:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:24,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:24,528 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:24,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:24,736 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 318290409, now seen corresponding path program 1 times [2019-11-07 00:43:24,737 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:24,737 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717781909] [2019-11-07 00:43:24,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:24,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717781909] [2019-11-07 00:43:24,858 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:24,858 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:24,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66016283] [2019-11-07 00:43:24,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:24,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:24,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:24,860 INFO L87 Difference]: Start difference. First operand 2910 states and 4721 transitions. Second operand 4 states. [2019-11-07 00:43:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:25,021 INFO L93 Difference]: Finished difference Result 5780 states and 9450 transitions. [2019-11-07 00:43:25,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:25,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-07 00:43:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:25,043 INFO L225 Difference]: With dead ends: 5780 [2019-11-07 00:43:25,044 INFO L226 Difference]: Without dead ends: 2904 [2019-11-07 00:43:25,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2019-11-07 00:43:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2894. [2019-11-07 00:43:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-07 00:43:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 4669 transitions. [2019-11-07 00:43:25,181 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 4669 transitions. Word has length 153 [2019-11-07 00:43:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:25,181 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 4669 transitions. [2019-11-07 00:43:25,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 4669 transitions. [2019-11-07 00:43:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:25,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:25,188 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:25,188 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1785476129, now seen corresponding path program 1 times [2019-11-07 00:43:25,189 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:25,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383846475] [2019-11-07 00:43:25,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:43:25,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383846475] [2019-11-07 00:43:25,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670600833] [2019-11-07 00:43:25,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:25,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:43:25,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:43:26,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:26,189 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:26,189 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 11 [2019-11-07 00:43:26,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131066463] [2019-11-07 00:43:26,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:26,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:26,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:26,191 INFO L87 Difference]: Start difference. First operand 2894 states and 4669 transitions. Second operand 3 states. [2019-11-07 00:43:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:26,371 INFO L93 Difference]: Finished difference Result 8582 states and 14025 transitions. [2019-11-07 00:43:26,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:26,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-11-07 00:43:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:26,431 INFO L225 Difference]: With dead ends: 8582 [2019-11-07 00:43:26,431 INFO L226 Difference]: Without dead ends: 5723 [2019-11-07 00:43:26,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2019-11-07 00:43:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 5653. [2019-11-07 00:43:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5653 states. [2019-11-07 00:43:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 9202 transitions. [2019-11-07 00:43:26,689 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 9202 transitions. Word has length 153 [2019-11-07 00:43:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:26,690 INFO L462 AbstractCegarLoop]: Abstraction has 5653 states and 9202 transitions. [2019-11-07 00:43:26,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 9202 transitions. [2019-11-07 00:43:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:26,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:26,698 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-07 00:43:26,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:26,914 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1229627489, now seen corresponding path program 1 times [2019-11-07 00:43:26,915 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:26,915 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44293791] [2019-11-07 00:43:26,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:43:27,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44293791] [2019-11-07 00:43:27,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279242631] [2019-11-07 00:43:27,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:27,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:43:27,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:43:27,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:28,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:43:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:28,161 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:43:28,161 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-11-07 00:43:28,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580837847] [2019-11-07 00:43:28,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:43:28,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:43:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:43:28,163 INFO L87 Difference]: Start difference. First operand 5653 states and 9202 transitions. Second operand 6 states. [2019-11-07 00:43:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:29,670 INFO L93 Difference]: Finished difference Result 15172 states and 24939 transitions. [2019-11-07 00:43:29,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:43:29,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-11-07 00:43:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:29,744 INFO L225 Difference]: With dead ends: 15172 [2019-11-07 00:43:29,744 INFO L226 Difference]: Without dead ends: 9553 [2019-11-07 00:43:29,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:43:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9553 states. [2019-11-07 00:43:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 9513. [2019-11-07 00:43:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9513 states. [2019-11-07 00:43:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 15166 transitions. [2019-11-07 00:43:30,138 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 15166 transitions. Word has length 153 [2019-11-07 00:43:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:30,138 INFO L462 AbstractCegarLoop]: Abstraction has 9513 states and 15166 transitions. [2019-11-07 00:43:30,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:43:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 15166 transitions. [2019-11-07 00:43:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:43:30,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:30,144 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:30,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:30,360 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2070244592, now seen corresponding path program 1 times [2019-11-07 00:43:30,360 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:30,360 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191235505] [2019-11-07 00:43:30,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 00:43:31,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191235505] [2019-11-07 00:43:31,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:31,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:31,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290621837] [2019-11-07 00:43:31,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:31,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:31,202 INFO L87 Difference]: Start difference. First operand 9513 states and 15166 transitions. Second operand 7 states. [2019-11-07 00:43:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,001 INFO L93 Difference]: Finished difference Result 28456 states and 46340 transitions. [2019-11-07 00:43:34,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:34,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-11-07 00:43:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,151 INFO L225 Difference]: With dead ends: 28456 [2019-11-07 00:43:34,152 INFO L226 Difference]: Without dead ends: 18977 [2019-11-07 00:43:34,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18977 states. [2019-11-07 00:43:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18977 to 18849. [2019-11-07 00:43:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18849 states. [2019-11-07 00:43:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 30362 transitions. [2019-11-07 00:43:35,037 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 30362 transitions. Word has length 161 [2019-11-07 00:43:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:35,037 INFO L462 AbstractCegarLoop]: Abstraction has 18849 states and 30362 transitions. [2019-11-07 00:43:35,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 30362 transitions. [2019-11-07 00:43:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:43:35,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:35,042 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:35,043 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash -529036724, now seen corresponding path program 1 times [2019-11-07 00:43:35,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:35,044 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324242357] [2019-11-07 00:43:35,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:43:35,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324242357] [2019-11-07 00:43:35,197 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:35,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:35,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623321856] [2019-11-07 00:43:35,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:35,199 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:35,203 INFO L87 Difference]: Start difference. First operand 18849 states and 30362 transitions. Second operand 4 states. [2019-11-07 00:43:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:35,872 INFO L93 Difference]: Finished difference Result 37740 states and 61311 transitions. [2019-11-07 00:43:35,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:35,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-11-07 00:43:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:36,220 INFO L225 Difference]: With dead ends: 37740 [2019-11-07 00:43:36,220 INFO L226 Difference]: Without dead ends: 18919 [2019-11-07 00:43:36,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18919 states. [2019-11-07 00:43:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18919 to 18855. [2019-11-07 00:43:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18855 states. [2019-11-07 00:43:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18855 states to 18855 states and 30286 transitions. [2019-11-07 00:43:36,991 INFO L78 Accepts]: Start accepts. Automaton has 18855 states and 30286 transitions. Word has length 162 [2019-11-07 00:43:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,992 INFO L462 AbstractCegarLoop]: Abstraction has 18855 states and 30286 transitions. [2019-11-07 00:43:36,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 18855 states and 30286 transitions. [2019-11-07 00:43:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:43:37,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:37,002 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:37,002 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:37,003 INFO L82 PathProgramCache]: Analyzing trace with hash 290171593, now seen corresponding path program 1 times [2019-11-07 00:43:37,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:37,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401728399] [2019-11-07 00:43:37,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:43:37,233 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401728399] [2019-11-07 00:43:37,233 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:37,233 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:37,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607906112] [2019-11-07 00:43:37,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:37,234 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:37,235 INFO L87 Difference]: Start difference. First operand 18855 states and 30286 transitions. Second operand 7 states.