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_spec13_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:07:36,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:07:36,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:07:36,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:07:36,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:07:36,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:07:36,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:07:36,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:07:36,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:07:36,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:07:36,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:07:36,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:07:36,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:07:36,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:07:36,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:07:36,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:07:36,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:07:36,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:07:36,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:07:36,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:07:36,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:07:36,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:07:36,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:07:36,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:07:36,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:07:36,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:07:36,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:07:36,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:07:36,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:07:36,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:07:36,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:07:36,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:07:36,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:07:36,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:07:36,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:07:36,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:07:36,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:07:36,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:07:36,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:07:36,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:07:36,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:07:36,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:07:36,908 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:07:36,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:07:36,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:07:36,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:07:36,910 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:07:36,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:07:36,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:07:36,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:07:36,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:07:36,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:07:36,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:07:36,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:07:36,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:07:36,911 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:07:36,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:07:36,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:07:36,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:07:36,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:07:36,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:07:36,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:07:36,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:07:36,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:36,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:07:36,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:07:36,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:07:36,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:07:36,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:07:36,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:07:36,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:07:37,199 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:07:37,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:07:37,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:07:37,221 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:07:37,222 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:07:37,222 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-15 01:07:37,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119d09095/d453c050f0704aaebbc729515bbcfcbf/FLAG6d150fa8d [2019-10-15 01:07:37,967 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:07:37,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-15 01:07:37,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119d09095/d453c050f0704aaebbc729515bbcfcbf/FLAG6d150fa8d [2019-10-15 01:07:38,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119d09095/d453c050f0704aaebbc729515bbcfcbf [2019-10-15 01:07:38,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:07:38,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:07:38,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:38,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:07:38,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:07:38,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:38" (1/1) ... [2019-10-15 01:07:38,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b2a64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:38, skipping insertion in model container [2019-10-15 01:07:38,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:38" (1/1) ... [2019-10-15 01:07:38,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:07:38,230 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:07:38,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:38,995 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:07:39,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:39,192 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:07:39,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39 WrapperNode [2019-10-15 01:07:39,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:39,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:07:39,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:07:39,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:07:39,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... [2019-10-15 01:07:39,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:07:39,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:07:39,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:07:39,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:07:39,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:07:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:07:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:07:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:07:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:07:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:07:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:07:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:07:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:07:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:07:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:07:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:07:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:07:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:07:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:07:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:07:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:07:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:07:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:07:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:07:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:07:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:07:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:07:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:07:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:07:39,499 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:07:39,500 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:07:39,500 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:07:39,500 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:07:39,500 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:07:39,500 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:07:39,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:07:39,502 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:07:39,503 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:07:39,503 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-15 01:07:39,503 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:07:39,503 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:07:39,503 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:07:39,504 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:07:39,504 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:07:39,504 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:07:39,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:07:39,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:07:39,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:07:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:07:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:07:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:07:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:07:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:07:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:07:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:07:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:07:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:07:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:07:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:07:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:07:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:07:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:07:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:07:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:07:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:07:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:07:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:07:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:07:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:07:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:07:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:07:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:07:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:07:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:07:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:07:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:07:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:07:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:07:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:07:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:07:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:07:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:07:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:07:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:07:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:07:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:07:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:07:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:07:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:07:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:07:41,886 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:07:41,886 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:07:41,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:41 BoogieIcfgContainer [2019-10-15 01:07:41,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:07:41,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:07:41,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:07:41,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:07:41,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:07:38" (1/3) ... [2019-10-15 01:07:41,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e62af6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:41, skipping insertion in model container [2019-10-15 01:07:41,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:39" (2/3) ... [2019-10-15 01:07:41,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e62af6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:41, skipping insertion in model container [2019-10-15 01:07:41,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:41" (3/3) ... [2019-10-15 01:07:41,899 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2019-10-15 01:07:41,910 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:07:41,922 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:07:41,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:07:41,978 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:07:41,978 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:07:41,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:07:41,978 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:07:41,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:07:41,979 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:07:41,979 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:07:41,979 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:07:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states. [2019-10-15 01:07:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:07:42,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:42,055 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] [2019-10-15 01:07:42,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1657439968, now seen corresponding path program 1 times [2019-10-15 01:07:42,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:42,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564930790] [2019-10-15 01:07:42,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:42,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:42,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:42,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564930790] [2019-10-15 01:07:42,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404147659] [2019-10-15 01:07:42,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:43,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:43,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:43,701 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:43,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:43,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 01:07:43,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512304027] [2019-10-15 01:07:43,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:43,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:43,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:43,907 INFO L87 Difference]: Start difference. First operand 823 states. Second operand 4 states. [2019-10-15 01:07:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:44,184 INFO L93 Difference]: Finished difference Result 1347 states and 2176 transitions. [2019-10-15 01:07:44,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:44,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-15 01:07:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:44,220 INFO L225 Difference]: With dead ends: 1347 [2019-10-15 01:07:44,221 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:07:44,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:07:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2019-10-15 01:07:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-15 01:07:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2019-10-15 01:07:44,361 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 113 [2019-10-15 01:07:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:44,362 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2019-10-15 01:07:44,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2019-10-15 01:07:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:07:44,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:44,370 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] [2019-10-15 01:07:44,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:44,578 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1328074300, now seen corresponding path program 1 times [2019-10-15 01:07:44,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:44,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331433036] [2019-10-15 01:07:44,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:44,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331433036] [2019-10-15 01:07:44,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561297373] [2019-10-15 01:07:44,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:45,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:45,536 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:45,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:45,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:45,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776614912] [2019-10-15 01:07:45,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:45,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:45,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:45,915 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand 7 states. [2019-10-15 01:07:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:46,100 INFO L93 Difference]: Finished difference Result 1341 states and 2139 transitions. [2019-10-15 01:07:46,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:46,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-15 01:07:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:46,107 INFO L225 Difference]: With dead ends: 1341 [2019-10-15 01:07:46,107 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:07:46,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:07:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 686. [2019-10-15 01:07:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-10-15 01:07:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1088 transitions. [2019-10-15 01:07:46,157 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1088 transitions. Word has length 115 [2019-10-15 01:07:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:46,158 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1088 transitions. [2019-10-15 01:07:46,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1088 transitions. [2019-10-15 01:07:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:07:46,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:46,161 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] [2019-10-15 01:07:46,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,369 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1848619236, now seen corresponding path program 1 times [2019-10-15 01:07:46,370 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:46,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132803496] [2019-10-15 01:07:46,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:46,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132803496] [2019-10-15 01:07:46,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782825967] [2019-10-15 01:07:46,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:47,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:47,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:47,247 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:47,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:47,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:47,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105231480] [2019-10-15 01:07:47,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:47,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:47,402 INFO L87 Difference]: Start difference. First operand 686 states and 1088 transitions. Second operand 4 states. [2019-10-15 01:07:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:47,514 INFO L93 Difference]: Finished difference Result 1357 states and 2164 transitions. [2019-10-15 01:07:47,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:47,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-15 01:07:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:47,520 INFO L225 Difference]: With dead ends: 1357 [2019-10-15 01:07:47,521 INFO L226 Difference]: Without dead ends: 697 [2019-10-15 01:07:47,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-15 01:07:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2019-10-15 01:07:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-15 01:07:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1096 transitions. [2019-10-15 01:07:47,585 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1096 transitions. Word has length 116 [2019-10-15 01:07:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:47,587 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1096 transitions. [2019-10-15 01:07:47,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1096 transitions. [2019-10-15 01:07:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:07:47,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:47,592 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] [2019-10-15 01:07:47,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -154321500, now seen corresponding path program 1 times [2019-10-15 01:07:47,808 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:47,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124086572] [2019-10-15 01:07:47,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:47,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124086572] [2019-10-15 01:07:47,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582343411] [2019-10-15 01:07:47,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:48,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:48,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:48,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:49,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:49,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:49,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838077577] [2019-10-15 01:07:49,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:49,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:49,113 INFO L87 Difference]: Start difference. First operand 695 states and 1096 transitions. Second operand 7 states. [2019-10-15 01:07:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:49,280 INFO L93 Difference]: Finished difference Result 1358 states and 2155 transitions. [2019-10-15 01:07:49,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:49,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-15 01:07:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:49,287 INFO L225 Difference]: With dead ends: 1358 [2019-10-15 01:07:49,287 INFO L226 Difference]: Without dead ends: 704 [2019-10-15 01:07:49,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-15 01:07:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 695. [2019-10-15 01:07:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-15 01:07:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1096 transitions. [2019-10-15 01:07:49,319 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1096 transitions. Word has length 116 [2019-10-15 01:07:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:49,320 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1096 transitions. [2019-10-15 01:07:49,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1096 transitions. [2019-10-15 01:07:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 01:07:49,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:49,323 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] [2019-10-15 01:07:49,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:49,531 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash -698243827, now seen corresponding path program 1 times [2019-10-15 01:07:49,532 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:49,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210964192] [2019-10-15 01:07:49,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:49,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210964192] [2019-10-15 01:07:49,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004658233] [2019-10-15 01:07:49,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:50,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:50,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:50,745 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:50,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:50,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298190844] [2019-10-15 01:07:50,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:50,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:50,749 INFO L87 Difference]: Start difference. First operand 695 states and 1096 transitions. Second operand 4 states. [2019-10-15 01:07:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:51,034 INFO L93 Difference]: Finished difference Result 1391 states and 2225 transitions. [2019-10-15 01:07:51,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:51,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-15 01:07:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:51,040 INFO L225 Difference]: With dead ends: 1391 [2019-10-15 01:07:51,041 INFO L226 Difference]: Without dead ends: 737 [2019-10-15 01:07:51,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-15 01:07:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 734. [2019-10-15 01:07:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-15 01:07:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1169 transitions. [2019-10-15 01:07:51,072 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1169 transitions. Word has length 119 [2019-10-15 01:07:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:51,073 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1169 transitions. [2019-10-15 01:07:51,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1169 transitions. [2019-10-15 01:07:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:07:51,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:51,076 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] [2019-10-15 01:07:51,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:51,292 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1098316311, now seen corresponding path program 1 times [2019-10-15 01:07:51,293 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:51,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726344693] [2019-10-15 01:07:51,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:51,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726344693] [2019-10-15 01:07:51,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578714293] [2019-10-15 01:07:51,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:52,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:52,093 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:52,211 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:52,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:52,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175662596] [2019-10-15 01:07:52,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:52,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:52,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:52,215 INFO L87 Difference]: Start difference. First operand 734 states and 1169 transitions. Second operand 5 states. [2019-10-15 01:07:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:52,328 INFO L93 Difference]: Finished difference Result 1415 states and 2271 transitions. [2019-10-15 01:07:52,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:52,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-15 01:07:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:52,341 INFO L225 Difference]: With dead ends: 1415 [2019-10-15 01:07:52,341 INFO L226 Difference]: Without dead ends: 734 [2019-10-15 01:07:52,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-15 01:07:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-10-15 01:07:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-15 01:07:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1164 transitions. [2019-10-15 01:07:52,384 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1164 transitions. Word has length 121 [2019-10-15 01:07:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:52,384 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1164 transitions. [2019-10-15 01:07:52,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1164 transitions. [2019-10-15 01:07:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:07:52,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:52,389 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] [2019-10-15 01:07:52,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,599 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1266209205, now seen corresponding path program 1 times [2019-10-15 01:07:52,600 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:52,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134352533] [2019-10-15 01:07:52,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:52,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134352533] [2019-10-15 01:07:52,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211313552] [2019-10-15 01:07:52,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:53,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:53,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:53,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:53,796 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:53,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:07:53,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202020363] [2019-10-15 01:07:53,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:07:53,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:07:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:07:53,800 INFO L87 Difference]: Start difference. First operand 734 states and 1164 transitions. Second operand 11 states. [2019-10-15 01:07:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:53,993 INFO L93 Difference]: Finished difference Result 1389 states and 2212 transitions. [2019-10-15 01:07:53,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:07:53,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-10-15 01:07:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:54,002 INFO L225 Difference]: With dead ends: 1389 [2019-10-15 01:07:54,002 INFO L226 Difference]: Without dead ends: 754 [2019-10-15 01:07:54,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:07:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2019-10-15 01:07:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 741. [2019-10-15 01:07:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:07:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-15 01:07:54,041 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 122 [2019-10-15 01:07:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:54,043 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-15 01:07:54,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:07:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-15 01:07:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:07:54,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:54,047 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] [2019-10-15 01:07:54,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:54,257 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1449069541, now seen corresponding path program 1 times [2019-10-15 01:07:54,258 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:54,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221974374] [2019-10-15 01:07:54,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:54,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221974374] [2019-10-15 01:07:54,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362867322] [2019-10-15 01:07:54,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:55,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:55,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:55,095 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:55,325 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:55,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:07:55,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038699265] [2019-10-15 01:07:55,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:07:55,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:07:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:55,327 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 8 states. [2019-10-15 01:07:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:55,468 INFO L93 Difference]: Finished difference Result 1387 states and 2208 transitions. [2019-10-15 01:07:55,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:55,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-15 01:07:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:55,475 INFO L225 Difference]: With dead ends: 1387 [2019-10-15 01:07:55,475 INFO L226 Difference]: Without dead ends: 752 [2019-10-15 01:07:55,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-15 01:07:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 745. [2019-10-15 01:07:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-15 01:07:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1180 transitions. [2019-10-15 01:07:55,512 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1180 transitions. Word has length 123 [2019-10-15 01:07:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:55,513 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1180 transitions. [2019-10-15 01:07:55,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:07:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1180 transitions. [2019-10-15 01:07:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:07:55,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:55,516 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] [2019-10-15 01:07:55,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:55,733 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1059446297, now seen corresponding path program 1 times [2019-10-15 01:07:55,734 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:55,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644626319] [2019-10-15 01:07:55,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:55,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:55,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:55,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644626319] [2019-10-15 01:07:55,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155576641] [2019-10-15 01:07:55,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:56,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:56,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:56,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:56,737 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:56,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:56,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481503204] [2019-10-15 01:07:56,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:56,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:56,739 INFO L87 Difference]: Start difference. First operand 745 states and 1180 transitions. Second operand 5 states. [2019-10-15 01:07:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:56,964 INFO L93 Difference]: Finished difference Result 1425 states and 2285 transitions. [2019-10-15 01:07:56,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:56,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-15 01:07:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:56,971 INFO L225 Difference]: With dead ends: 1425 [2019-10-15 01:07:56,972 INFO L226 Difference]: Without dead ends: 790 [2019-10-15 01:07:56,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2019-10-15 01:07:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2019-10-15 01:07:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-10-15 01:07:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1256 transitions. [2019-10-15 01:07:57,019 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1256 transitions. Word has length 124 [2019-10-15 01:07:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:57,021 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1256 transitions. [2019-10-15 01:07:57,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1256 transitions. [2019-10-15 01:07:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:07:57,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:57,026 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] [2019-10-15 01:07:57,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:57,236 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash -968304473, now seen corresponding path program 1 times [2019-10-15 01:07:57,236 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:57,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914518816] [2019-10-15 01:07:57,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:57,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:57,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:57,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914518816] [2019-10-15 01:07:57,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114305802] [2019-10-15 01:07:57,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:58,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:58,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:58,280 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:58,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-15 01:07:58,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690475778] [2019-10-15 01:07:58,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:07:58,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:07:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:58,282 INFO L87 Difference]: Start difference. First operand 787 states and 1256 transitions. Second operand 6 states. [2019-10-15 01:07:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:58,350 INFO L93 Difference]: Finished difference Result 1479 states and 2370 transitions. [2019-10-15 01:07:58,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:58,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-15 01:07:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:58,357 INFO L225 Difference]: With dead ends: 1479 [2019-10-15 01:07:58,357 INFO L226 Difference]: Without dead ends: 783 [2019-10-15 01:07:58,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-15 01:07:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 780. [2019-10-15 01:07:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-10-15 01:07:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1243 transitions. [2019-10-15 01:07:58,387 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1243 transitions. Word has length 125 [2019-10-15 01:07:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:58,387 INFO L462 AbstractCegarLoop]: Abstraction has 780 states and 1243 transitions. [2019-10-15 01:07:58,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:07:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1243 transitions. [2019-10-15 01:07:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 01:07:58,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:58,392 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, 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] [2019-10-15 01:07:58,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,606 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1832817376, now seen corresponding path program 1 times [2019-10-15 01:07:58,606 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:58,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851235656] [2019-10-15 01:07:58,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:58,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851235656] [2019-10-15 01:07:58,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582199814] [2019-10-15 01:07:58,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:59,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:07:59,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 01:07:59,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:59,904 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:59,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 01:07:59,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560857796] [2019-10-15 01:07:59,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:59,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:07:59,907 INFO L87 Difference]: Start difference. First operand 780 states and 1243 transitions. Second operand 4 states. [2019-10-15 01:08:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:01,212 INFO L93 Difference]: Finished difference Result 2635 states and 4263 transitions. [2019-10-15 01:08:01,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:01,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-15 01:08:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:01,227 INFO L225 Difference]: With dead ends: 2635 [2019-10-15 01:08:01,227 INFO L226 Difference]: Without dead ends: 2004 [2019-10-15 01:08:01,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:08:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2019-10-15 01:08:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1858. [2019-10-15 01:08:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1858 states. [2019-10-15 01:08:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3011 transitions. [2019-10-15 01:08:01,300 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3011 transitions. Word has length 126 [2019-10-15 01:08:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:01,301 INFO L462 AbstractCegarLoop]: Abstraction has 1858 states and 3011 transitions. [2019-10-15 01:08:01,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3011 transitions. [2019-10-15 01:08:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:08:01,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:01,307 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, 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] [2019-10-15 01:08:01,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:01,515 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash -918204397, now seen corresponding path program 1 times [2019-10-15 01:08:01,516 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:01,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166375528] [2019-10-15 01:08:01,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:01,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:01,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:08:01,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166375528] [2019-10-15 01:08:01,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494621077] [2019-10-15 01:08:01,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:02,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:08:02,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:08:02,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:08:02,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:02,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 01:08:02,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224226389] [2019-10-15 01:08:02,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:02,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:08:02,689 INFO L87 Difference]: Start difference. First operand 1858 states and 3011 transitions. Second operand 4 states. [2019-10-15 01:08:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:02,788 INFO L93 Difference]: Finished difference Result 3675 states and 5982 transitions. [2019-10-15 01:08:02,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:02,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-10-15 01:08:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:02,803 INFO L225 Difference]: With dead ends: 3675 [2019-10-15 01:08:02,803 INFO L226 Difference]: Without dead ends: 1835 [2019-10-15 01:08:02,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:08:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2019-10-15 01:08:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1835. [2019-10-15 01:08:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2019-10-15 01:08:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2966 transitions. [2019-10-15 01:08:02,891 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2966 transitions. Word has length 176 [2019-10-15 01:08:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:02,891 INFO L462 AbstractCegarLoop]: Abstraction has 1835 states and 2966 transitions. [2019-10-15 01:08:02,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2966 transitions. [2019-10-15 01:08:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:08:02,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:02,897 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:03,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:03,106 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084325, now seen corresponding path program 1 times [2019-10-15 01:08:03,107 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:03,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695144599] [2019-10-15 01:08:03,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:03,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:03,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:03,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695144599] [2019-10-15 01:08:03,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853821903] [2019-10-15 01:08:03,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:04,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:04,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:04,303 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:04,579 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:04,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-15 01:08:04,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277319965] [2019-10-15 01:08:04,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:04,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:04,581 INFO L87 Difference]: Start difference. First operand 1835 states and 2966 transitions. Second operand 7 states. [2019-10-15 01:08:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:04,740 INFO L93 Difference]: Finished difference Result 3634 states and 5879 transitions. [2019-10-15 01:08:04,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:04,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2019-10-15 01:08:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:04,753 INFO L225 Difference]: With dead ends: 3634 [2019-10-15 01:08:04,753 INFO L226 Difference]: Without dead ends: 1847 [2019-10-15 01:08:04,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 336 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2019-10-15 01:08:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1829. [2019-10-15 01:08:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2019-10-15 01:08:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2952 transitions. [2019-10-15 01:08:04,824 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2952 transitions. Word has length 173 [2019-10-15 01:08:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:04,824 INFO L462 AbstractCegarLoop]: Abstraction has 1829 states and 2952 transitions. [2019-10-15 01:08:04,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2952 transitions. [2019-10-15 01:08:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:08:04,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:04,830 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:05,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:05,043 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash 455100135, now seen corresponding path program 1 times [2019-10-15 01:08:05,043 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:05,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954280872] [2019-10-15 01:08:05,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:05,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:05,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:05,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954280872] [2019-10-15 01:08:05,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009196857] [2019-10-15 01:08:05,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:06,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:06,166 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:06,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:06,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:06,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:06,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158083642] [2019-10-15 01:08:06,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:06,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:06,638 INFO L87 Difference]: Start difference. First operand 1829 states and 2952 transitions. Second operand 9 states. [2019-10-15 01:08:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:06,916 INFO L93 Difference]: Finished difference Result 3635 states and 5877 transitions. [2019-10-15 01:08:06,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:06,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 173 [2019-10-15 01:08:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:06,931 INFO L225 Difference]: With dead ends: 3635 [2019-10-15 01:08:06,931 INFO L226 Difference]: Without dead ends: 1855 [2019-10-15 01:08:06,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2019-10-15 01:08:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1831. [2019-10-15 01:08:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-15 01:08:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-15 01:08:07,004 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 173 [2019-10-15 01:08:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:07,004 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-15 01:08:07,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-15 01:08:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 01:08:07,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:07,011 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:07,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:07,218 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -718598851, now seen corresponding path program 1 times [2019-10-15 01:08:07,219 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:07,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086503719] [2019-10-15 01:08:07,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:07,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086503719] [2019-10-15 01:08:07,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492259603] [2019-10-15 01:08:07,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:08,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:08,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:08,207 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:08,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:08,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:08,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:08,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077374548] [2019-10-15 01:08:08,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:08,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:08,873 INFO L87 Difference]: Start difference. First operand 1831 states and 2956 transitions. Second operand 9 states. [2019-10-15 01:08:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:09,141 INFO L93 Difference]: Finished difference Result 3636 states and 5881 transitions. [2019-10-15 01:08:09,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:09,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-15 01:08:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:09,157 INFO L225 Difference]: With dead ends: 3636 [2019-10-15 01:08:09,158 INFO L226 Difference]: Without dead ends: 1854 [2019-10-15 01:08:09,172 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2019-10-15 01:08:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1831. [2019-10-15 01:08:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-15 01:08:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-15 01:08:09,241 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 174 [2019-10-15 01:08:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:09,242 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-15 01:08:09,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-15 01:08:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:08:09,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:09,251 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:09,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:09,462 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1640133275, now seen corresponding path program 1 times [2019-10-15 01:08:09,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:09,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072410275] [2019-10-15 01:08:09,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:09,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:09,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:09,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072410275] [2019-10-15 01:08:09,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591936662] [2019-10-15 01:08:09,593 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 [2019-10-15 01:08:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:10,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:10,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:10,516 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:10,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:10,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:10,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:08:10,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42825968] [2019-10-15 01:08:10,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:10,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:10,916 INFO L87 Difference]: Start difference. First operand 1831 states and 2956 transitions. Second operand 9 states. [2019-10-15 01:08:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:11,173 INFO L93 Difference]: Finished difference Result 3637 states and 5885 transitions. [2019-10-15 01:08:11,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:11,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-15 01:08:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:11,187 INFO L225 Difference]: With dead ends: 3637 [2019-10-15 01:08:11,189 INFO L226 Difference]: Without dead ends: 1855 [2019-10-15 01:08:11,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 337 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:11,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2019-10-15 01:08:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1831. [2019-10-15 01:08:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2019-10-15 01:08:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2956 transitions. [2019-10-15 01:08:11,260 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2956 transitions. Word has length 176 [2019-10-15 01:08:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:11,260 INFO L462 AbstractCegarLoop]: Abstraction has 1831 states and 2956 transitions. [2019-10-15 01:08:11,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2956 transitions. [2019-10-15 01:08:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:08:11,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:11,268 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:11,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:11,476 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1260907448, now seen corresponding path program 1 times [2019-10-15 01:08:11,477 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:11,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654778386] [2019-10-15 01:08:11,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:11,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:11,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:11,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654778386] [2019-10-15 01:08:11,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551032653] [2019-10-15 01:08:11,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:08:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:12,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:08:12,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:08:12,582 INFO L321 TraceCheckSpWp]: Computing backward predicates...