java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:12,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:12,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:12,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:12,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:12,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:12,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:12,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:12,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:12,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:12,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:12,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:12,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:12,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:12,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:12,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:12,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:12,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:12,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:12,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:12,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:12,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:12,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:12,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:12,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:12,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:12,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:12,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:12,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:12,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:12,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:12,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:12,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:12,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:12,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:12,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:12,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:12,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:12,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:12,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:12,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:12,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:12,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:12,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:12,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:12,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:12,215 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:12,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:12,216 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:12,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:12,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:12,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:12,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:12,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:12,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:12,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:12,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:12,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:12,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:12,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:12,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:12,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:12,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:12,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:12,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:12,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:12,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:12,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:12,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:12,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:12,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:12,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:12,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:12,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:12,532 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:12,532 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:12,533 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-10-13 21:10:12,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56669f00a/b29dfee6d41841a08524141fe656b2a2/FLAGb46e4e8e9 [2019-10-13 21:10:13,279 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:13,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-10-13 21:10:13,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56669f00a/b29dfee6d41841a08524141fe656b2a2/FLAGb46e4e8e9 [2019-10-13 21:10:13,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56669f00a/b29dfee6d41841a08524141fe656b2a2 [2019-10-13 21:10:13,492 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:13,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:13,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:13,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:13,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:13,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:13" (1/1) ... [2019-10-13 21:10:13,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@958021d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:13, skipping insertion in model container [2019-10-13 21:10:13,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:13" (1/1) ... [2019-10-13 21:10:13,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:13,587 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:14,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:14,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:14,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:14,557 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:14,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14 WrapperNode [2019-10-13 21:10:14,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:14,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:14,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:14,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:14,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... [2019-10-13 21:10:14,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:14,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:14,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:14,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:14,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:14,928 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:14,928 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:14,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:14,928 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:14,929 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:14,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:14,929 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:14,929 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:14,930 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:14,934 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:14,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:14,934 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:14,934 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:14,935 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:14,935 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:14,935 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:14,939 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:14,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:14,940 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:14,940 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:14,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:14,941 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:14,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:14,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:14,941 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:14,942 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:14,942 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:14,942 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:14,943 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:14,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:14,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:14,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:17,623 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:17,623 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:17,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:17 BoogieIcfgContainer [2019-10-13 21:10:17,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:17,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:17,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:17,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:17,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:13" (1/3) ... [2019-10-13 21:10:17,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22492f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:17, skipping insertion in model container [2019-10-13 21:10:17,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:14" (2/3) ... [2019-10-13 21:10:17,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22492f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:17, skipping insertion in model container [2019-10-13 21:10:17,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:17" (3/3) ... [2019-10-13 21:10:17,634 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2019-10-13 21:10:17,644 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:17,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:17,666 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:17,709 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:17,709 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:17,709 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:17,709 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:17,709 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:17,710 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:17,710 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:17,710 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-10-13 21:10:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:10:17,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,794 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:17,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 902898907, now seen corresponding path program 1 times [2019-10-13 21:10:17,815 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:17,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128184148] [2019-10-13 21:10:17,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:18,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128184148] [2019-10-13 21:10:18,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89300063] [2019-10-13 21:10:18,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:19,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:19,222 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:19,588 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:19,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:19,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711864436] [2019-10-13 21:10:19,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:19,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:19,618 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-10-13 21:10:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:19,701 INFO L93 Difference]: Finished difference Result 673 states and 1068 transitions. [2019-10-13 21:10:19,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:19,703 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-10-13 21:10:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:19,824 INFO L225 Difference]: With dead ends: 673 [2019-10-13 21:10:19,824 INFO L226 Difference]: Without dead ends: 636 [2019-10-13 21:10:19,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-13 21:10:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-13 21:10:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1013 transitions. [2019-10-13 21:10:19,989 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1013 transitions. Word has length 155 [2019-10-13 21:10:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:19,997 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1013 transitions. [2019-10-13 21:10:19,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1013 transitions. [2019-10-13 21:10:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:10:20,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:20,016 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:20,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,227 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 598223950, now seen corresponding path program 1 times [2019-10-13 21:10:20,229 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:20,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425554515] [2019-10-13 21:10:20,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:20,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425554515] [2019-10-13 21:10:20,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631846468] [2019-10-13 21:10:20,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:21,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:21,175 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:21,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:21,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:21,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649835795] [2019-10-13 21:10:21,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:21,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:21,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:21,496 INFO L87 Difference]: Start difference. First operand 636 states and 1013 transitions. Second operand 4 states. [2019-10-13 21:10:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:21,594 INFO L93 Difference]: Finished difference Result 1244 states and 1999 transitions. [2019-10-13 21:10:21,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:21,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-13 21:10:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:21,602 INFO L225 Difference]: With dead ends: 1244 [2019-10-13 21:10:21,602 INFO L226 Difference]: Without dead ends: 636 [2019-10-13 21:10:21,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-13 21:10:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-13 21:10:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1012 transitions. [2019-10-13 21:10:21,661 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1012 transitions. Word has length 157 [2019-10-13 21:10:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:21,661 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1012 transitions. [2019-10-13 21:10:21,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1012 transitions. [2019-10-13 21:10:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 21:10:21,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:21,672 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:21,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,889 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1074530708, now seen corresponding path program 1 times [2019-10-13 21:10:21,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:21,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138456849] [2019-10-13 21:10:21,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:22,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138456849] [2019-10-13 21:10:22,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139659560] [2019-10-13 21:10:22,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:22,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:22,779 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:23,095 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:23,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:23,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836252211] [2019-10-13 21:10:23,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:23,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:23,097 INFO L87 Difference]: Start difference. First operand 636 states and 1012 transitions. Second operand 4 states. [2019-10-13 21:10:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,188 INFO L93 Difference]: Finished difference Result 1244 states and 1997 transitions. [2019-10-13 21:10:23,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:23,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-13 21:10:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,196 INFO L225 Difference]: With dead ends: 1244 [2019-10-13 21:10:23,197 INFO L226 Difference]: Without dead ends: 636 [2019-10-13 21:10:23,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-13 21:10:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-13 21:10:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1011 transitions. [2019-10-13 21:10:23,240 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1011 transitions. Word has length 159 [2019-10-13 21:10:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1011 transitions. [2019-10-13 21:10:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1011 transitions. [2019-10-13 21:10:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:10:23,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,247 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:23,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,456 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:23,457 INFO L82 PathProgramCache]: Analyzing trace with hash 480608966, now seen corresponding path program 1 times [2019-10-13 21:10:23,457 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:23,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538560773] [2019-10-13 21:10:23,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:23,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538560773] [2019-10-13 21:10:23,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826448427] [2019-10-13 21:10:23,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:24,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:24,373 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:24,639 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:24,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:24,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738486585] [2019-10-13 21:10:24,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:24,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:24,644 INFO L87 Difference]: Start difference. First operand 636 states and 1011 transitions. Second operand 4 states. [2019-10-13 21:10:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:24,742 INFO L93 Difference]: Finished difference Result 1251 states and 2004 transitions. [2019-10-13 21:10:24,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:24,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 21:10:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:24,748 INFO L225 Difference]: With dead ends: 1251 [2019-10-13 21:10:24,748 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:24,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1023 transitions. [2019-10-13 21:10:24,779 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1023 transitions. Word has length 161 [2019-10-13 21:10:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:24,780 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1023 transitions. [2019-10-13 21:10:24,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1023 transitions. [2019-10-13 21:10:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:10:24,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,787 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:25,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,005 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 744578377, now seen corresponding path program 1 times [2019-10-13 21:10:25,006 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:25,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974487132] [2019-10-13 21:10:25,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:25,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974487132] [2019-10-13 21:10:25,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788657907] [2019-10-13 21:10:25,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:25,883 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:26,145 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:26,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:26,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966507824] [2019-10-13 21:10:26,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:26,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:26,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:26,148 INFO L87 Difference]: Start difference. First operand 645 states and 1023 transitions. Second operand 4 states. [2019-10-13 21:10:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:26,265 INFO L93 Difference]: Finished difference Result 1253 states and 2005 transitions. [2019-10-13 21:10:26,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:26,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 21:10:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:26,288 INFO L225 Difference]: With dead ends: 1253 [2019-10-13 21:10:26,288 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:26,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1022 transitions. [2019-10-13 21:10:26,330 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1022 transitions. Word has length 162 [2019-10-13 21:10:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,331 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1022 transitions. [2019-10-13 21:10:26,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1022 transitions. [2019-10-13 21:10:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:10:26,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,341 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:26,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,560 INFO L82 PathProgramCache]: Analyzing trace with hash -831847774, now seen corresponding path program 1 times [2019-10-13 21:10:26,560 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474135102] [2019-10-13 21:10:26,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:26,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474135102] [2019-10-13 21:10:26,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777181914] [2019-10-13 21:10:26,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:27,464 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:27,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:27,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:27,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765758719] [2019-10-13 21:10:27,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:27,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:27,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:27,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:27,758 INFO L87 Difference]: Start difference. First operand 645 states and 1022 transitions. Second operand 4 states. [2019-10-13 21:10:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:27,858 INFO L93 Difference]: Finished difference Result 1253 states and 2004 transitions. [2019-10-13 21:10:27,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:27,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-13 21:10:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:27,866 INFO L225 Difference]: With dead ends: 1253 [2019-10-13 21:10:27,867 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:27,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-10-13 21:10:27,902 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 163 [2019-10-13 21:10:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:27,903 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-10-13 21:10:27,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-10-13 21:10:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:10:27,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:27,912 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:28,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,132 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 669005797, now seen corresponding path program 1 times [2019-10-13 21:10:28,133 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:28,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342329346] [2019-10-13 21:10:28,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:28,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342329346] [2019-10-13 21:10:28,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715530312] [2019-10-13 21:10:28,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:29,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:29,098 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:29,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:29,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:29,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690226060] [2019-10-13 21:10:29,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:29,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:29,360 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 4 states. [2019-10-13 21:10:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:29,529 INFO L93 Difference]: Finished difference Result 1252 states and 2004 transitions. [2019-10-13 21:10:29,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:29,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-13 21:10:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:29,534 INFO L225 Difference]: With dead ends: 1252 [2019-10-13 21:10:29,534 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:29,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1016 transitions. [2019-10-13 21:10:29,560 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1016 transitions. Word has length 164 [2019-10-13 21:10:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:29,561 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1016 transitions. [2019-10-13 21:10:29,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1016 transitions. [2019-10-13 21:10:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:10:29,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:29,566 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:29,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,784 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1950074191, now seen corresponding path program 1 times [2019-10-13 21:10:29,784 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:29,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367868114] [2019-10-13 21:10:29,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:29,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367868114] [2019-10-13 21:10:29,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477987337] [2019-10-13 21:10:29,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:30,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:30,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:31,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:31,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:31,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192255911] [2019-10-13 21:10:31,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:31,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:31,082 INFO L87 Difference]: Start difference. First operand 645 states and 1016 transitions. Second operand 4 states. [2019-10-13 21:10:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:31,254 INFO L93 Difference]: Finished difference Result 1252 states and 1994 transitions. [2019-10-13 21:10:31,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:31,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:10:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:31,259 INFO L225 Difference]: With dead ends: 1252 [2019-10-13 21:10:31,260 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:31,263 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1011 transitions. [2019-10-13 21:10:31,292 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1011 transitions. Word has length 166 [2019-10-13 21:10:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:31,292 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1011 transitions. [2019-10-13 21:10:31,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1011 transitions. [2019-10-13 21:10:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:10:31,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:31,298 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:31,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:31,514 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash 889413103, now seen corresponding path program 1 times [2019-10-13 21:10:31,516 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:31,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106964851] [2019-10-13 21:10:31,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:31,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106964851] [2019-10-13 21:10:31,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551291192] [2019-10-13 21:10:31,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:32,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:32,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:32,462 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:33,047 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-10-13 21:10:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:33,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:33,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:33,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584942716] [2019-10-13 21:10:33,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:33,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:33,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:33,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:33,144 INFO L87 Difference]: Start difference. First operand 645 states and 1011 transitions. Second operand 4 states. [2019-10-13 21:10:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:33,367 INFO L93 Difference]: Finished difference Result 1288 states and 2043 transitions. [2019-10-13 21:10:33,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:33,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:10:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:33,374 INFO L225 Difference]: With dead ends: 1288 [2019-10-13 21:10:33,374 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:10:33,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:10:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-13 21:10:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-13 21:10:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1075 transitions. [2019-10-13 21:10:33,400 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1075 transitions. Word has length 168 [2019-10-13 21:10:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:33,401 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1075 transitions. [2019-10-13 21:10:33,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1075 transitions. [2019-10-13 21:10:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:10:33,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:33,407 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:33,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:33,622 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash 666131544, now seen corresponding path program 1 times [2019-10-13 21:10:33,622 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:33,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787699668] [2019-10-13 21:10:33,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:33,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787699668] [2019-10-13 21:10:33,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434033821] [2019-10-13 21:10:33,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:34,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:34,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:35,039 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:35,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:35,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194314803] [2019-10-13 21:10:35,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:35,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:35,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:35,043 INFO L87 Difference]: Start difference. First operand 684 states and 1075 transitions. Second operand 4 states. [2019-10-13 21:10:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:35,257 INFO L93 Difference]: Finished difference Result 1291 states and 2046 transitions. [2019-10-13 21:10:35,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:35,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 21:10:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:35,265 INFO L225 Difference]: With dead ends: 1291 [2019-10-13 21:10:35,265 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:10:35,269 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:10:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-13 21:10:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-13 21:10:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-10-13 21:10:35,302 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 169 [2019-10-13 21:10:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:35,303 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-10-13 21:10:35,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-10-13 21:10:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:10:35,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:35,309 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:35,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,526 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1349098745, now seen corresponding path program 1 times [2019-10-13 21:10:35,527 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:35,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644363886] [2019-10-13 21:10:35,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:35,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644363886] [2019-10-13 21:10:35,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518956335] [2019-10-13 21:10:35,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:36,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:36,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:36,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:37,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:37,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:37,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:37,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357704292] [2019-10-13 21:10:37,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:37,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:37,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:37,211 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 9 states. [2019-10-13 21:10:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:37,457 INFO L93 Difference]: Finished difference Result 1304 states and 2060 transitions. [2019-10-13 21:10:37,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:37,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 169 [2019-10-13 21:10:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:37,463 INFO L225 Difference]: With dead ends: 1304 [2019-10-13 21:10:37,463 INFO L226 Difference]: Without dead ends: 700 [2019-10-13 21:10:37,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-13 21:10:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 693. [2019-10-13 21:10:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-13 21:10:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-10-13 21:10:37,500 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 169 [2019-10-13 21:10:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:37,501 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-10-13 21:10:37,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-10-13 21:10:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:37,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:37,506 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:37,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:37,714 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1532717939, now seen corresponding path program 1 times [2019-10-13 21:10:37,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:37,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124867705] [2019-10-13 21:10:37,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:10:37,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124867705] [2019-10-13 21:10:37,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995064497] [2019-10-13 21:10:37,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:38,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:38,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:38,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:38,867 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:38,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:38,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977900948] [2019-10-13 21:10:38,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:38,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:38,869 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 4 states. [2019-10-13 21:10:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:39,062 INFO L93 Difference]: Finished difference Result 1305 states and 2063 transitions. [2019-10-13 21:10:39,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:39,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:10:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:39,068 INFO L225 Difference]: With dead ends: 1305 [2019-10-13 21:10:39,068 INFO L226 Difference]: Without dead ends: 693 [2019-10-13 21:10:39,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-13 21:10:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-13 21:10:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-13 21:10:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1078 transitions. [2019-10-13 21:10:39,098 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1078 transitions. Word has length 170 [2019-10-13 21:10:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:39,099 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1078 transitions. [2019-10-13 21:10:39,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1078 transitions. [2019-10-13 21:10:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:39,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:39,104 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:39,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:39,321 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash -852054306, now seen corresponding path program 1 times [2019-10-13 21:10:39,321 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:39,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775764563] [2019-10-13 21:10:39,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,322 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:10:39,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775764563] [2019-10-13 21:10:39,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023940190] [2019-10-13 21:10:39,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:40,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:40,272 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:40,679 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:40,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:40,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503141958] [2019-10-13 21:10:40,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:40,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:40,681 INFO L87 Difference]: Start difference. First operand 693 states and 1078 transitions. Second operand 11 states. [2019-10-13 21:10:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:40,894 INFO L93 Difference]: Finished difference Result 1242 states and 1957 transitions. [2019-10-13 21:10:40,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:40,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-13 21:10:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:40,902 INFO L225 Difference]: With dead ends: 1242 [2019-10-13 21:10:40,902 INFO L226 Difference]: Without dead ends: 710 [2019-10-13 21:10:40,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-10-13 21:10:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 700. [2019-10-13 21:10:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-13 21:10:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1088 transitions. [2019-10-13 21:10:40,959 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1088 transitions. Word has length 171 [2019-10-13 21:10:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:40,959 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1088 transitions. [2019-10-13 21:10:40,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1088 transitions. [2019-10-13 21:10:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:40,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:40,964 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:41,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:41,181 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash -753784112, now seen corresponding path program 1 times [2019-10-13 21:10:41,182 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:41,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852386224] [2019-10-13 21:10:41,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:41,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:41,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:41,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852386224] [2019-10-13 21:10:41,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777921683] [2019-10-13 21:10:41,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:42,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:42,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:42,126 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:42,463 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:42,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:42,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727893025] [2019-10-13 21:10:42,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:42,466 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:42,467 INFO L87 Difference]: Start difference. First operand 700 states and 1088 transitions. Second operand 8 states. [2019-10-13 21:10:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:42,670 INFO L93 Difference]: Finished difference Result 1246 states and 1966 transitions. [2019-10-13 21:10:42,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:42,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-10-13 21:10:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:42,679 INFO L225 Difference]: With dead ends: 1246 [2019-10-13 21:10:42,679 INFO L226 Difference]: Without dead ends: 714 [2019-10-13 21:10:42,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2019-10-13 21:10:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 707. [2019-10-13 21:10:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-13 21:10:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-10-13 21:10:42,717 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-10-13 21:10:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:42,720 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-10-13 21:10:42,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-10-13 21:10:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:42,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:42,725 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:42,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,934 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1017223344, now seen corresponding path program 1 times [2019-10-13 21:10:42,935 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:42,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683953769] [2019-10-13 21:10:42,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:43,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683953769] [2019-10-13 21:10:43,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893631764] [2019-10-13 21:10:43,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:43,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:44,043 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:44,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:44,531 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:44,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:44,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511447769] [2019-10-13 21:10:44,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:44,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:44,533 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 14 states. [2019-10-13 21:10:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:44,778 INFO L93 Difference]: Finished difference Result 1247 states and 1966 transitions. [2019-10-13 21:10:44,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:44,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 170 [2019-10-13 21:10:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:44,783 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 21:10:44,783 INFO L226 Difference]: Without dead ends: 715 [2019-10-13 21:10:44,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-13 21:10:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 707. [2019-10-13 21:10:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-13 21:10:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-10-13 21:10:44,810 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-10-13 21:10:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:44,811 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-10-13 21:10:44,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-10-13 21:10:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:44,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:44,816 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:45,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,032 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash -618074511, now seen corresponding path program 1 times [2019-10-13 21:10:45,033 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:45,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949115296] [2019-10-13 21:10:45,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:45,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949115296] [2019-10-13 21:10:45,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065093891] [2019-10-13 21:10:45,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:45,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:45,986 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:46,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:46,506 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:46,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:46,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515942041] [2019-10-13 21:10:46,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:46,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:46,508 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 11 states. [2019-10-13 21:10:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:46,743 INFO L93 Difference]: Finished difference Result 1248 states and 1974 transitions. [2019-10-13 21:10:46,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:46,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-13 21:10:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:46,749 INFO L225 Difference]: With dead ends: 1248 [2019-10-13 21:10:46,749 INFO L226 Difference]: Without dead ends: 716 [2019-10-13 21:10:46,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 329 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-10-13 21:10:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 709. [2019-10-13 21:10:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-10-13 21:10:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1105 transitions. [2019-10-13 21:10:46,782 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1105 transitions. Word has length 171 [2019-10-13 21:10:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:46,783 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1105 transitions. [2019-10-13 21:10:46,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1105 transitions. [2019-10-13 21:10:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:10:46,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:46,788 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:47,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:47,005 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1414360821, now seen corresponding path program 1 times [2019-10-13 21:10:47,069 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:47,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297842928] [2019-10-13 21:10:47,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:47,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297842928] [2019-10-13 21:10:47,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821776752] [2019-10-13 21:10:47,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true